kotlin work part. 1

63 files changed, 3555 insertions, 3894 deletions

diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ColoredRelativeLayout.java b/app/src/main/java/net/lacolaco/smileessence/view/ColoredRelativeLayout.java
deleted file mode 100644
index 33fc05ac..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/ColoredRelativeLayout.java
+++ /dev/null
@@ -1,61 +0,0 @@
-package net.lacolaco.smileessence.view;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.Canvas;
-import android.graphics.Paint;
-import android.util.AttributeSet;
-import android.widget.RelativeLayout;
-import net.lacolaco.smileessence.R;
-
-
-public class ColoredRelativeLayout extends RelativeLayout {
-    public static final int HIGHLIGHT_NONE = 0;
-    private final Paint paint = new Paint();
-    private int highlightColors[] = new int[4];
-    private boolean showAccent = false;
-
-    public ColoredRelativeLayout(Context context) {
-        this(context, null);
-    }
-
-    public ColoredRelativeLayout(Context context, AttributeSet attrs) {
-        this(context, attrs, 0);
-    }
-
-    public ColoredRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr) {
-        this(context, attrs, defStyleAttr, 0);
-    }
-
-    public ColoredRelativeLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-
-        setWillNotDraw(false);
-
-        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ColoredRelativeLayout);
-        highlightColors[0] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_none, R.color.black);
-        highlightColors[1] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_type1, R.color.orange);
-        highlightColors[2] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_type2, R.color.green);
-        highlightColors[3] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_type3, R.color.metro_blue);
-        setHighlight(HIGHLIGHT_NONE);
-        paint.setColor(ta.getColor(R.styleable.ColoredRelativeLayout_accent_color, R.color.red));
-        paint.setStyle(Paint.Style.STROKE);
-        paint.setStrokeWidth(3);
-        ta.recycle();
-    }
-
-    @Override
-    protected void onDraw(Canvas canvas) {
-        super.onDraw(canvas);
-        if (showAccent)
-            canvas.drawLine(1, 0, 1, getMeasuredHeight(), paint);
-    }
-
-    public void setAccentVisibility(boolean yes) {
-        showAccent = yes;
-    }
-
-    public void setHighlight(int type) {
-        setBackgroundColor(highlightColors[type]);
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ColoredRelativeLayout.kt b/app/src/main/java/net/lacolaco/smileessence/view/ColoredRelativeLayout.kt
new file mode 100644
index 00000000..0bf69378
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/ColoredRelativeLayout.kt
@@ -0,0 +1,50 @@
+package net.lacolaco.smileessence.view
+
+import android.content.Context
+import android.content.res.TypedArray
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.util.AttributeSet
+import android.widget.RelativeLayout
+import net.lacolaco.smileessence.R
+
+
+class ColoredRelativeLayout @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0, defStyleRes: Int = 0) : RelativeLayout(context, attrs, defStyleAttr, defStyleRes) {
+    private val paint = Paint()
+    private val highlightColors = IntArray(4)
+    private var showAccent = false
+
+    init {
+
+        setWillNotDraw(false)
+
+        val ta = context.obtainStyledAttributes(attrs, R.styleable.ColoredRelativeLayout)
+        highlightColors[0] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_none, R.color.black)
+        highlightColors[1] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_type1, R.color.orange)
+        highlightColors[2] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_type2, R.color.green)
+        highlightColors[3] = ta.getColor(R.styleable.ColoredRelativeLayout_highlight_type3, R.color.metro_blue)
+        setHighlight(HIGHLIGHT_NONE)
+        paint.color = ta.getColor(R.styleable.ColoredRelativeLayout_accent_color, R.color.red)
+        paint.style = Paint.Style.STROKE
+        paint.strokeWidth = 3f
+        ta.recycle()
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        super.onDraw(canvas)
+        if (showAccent)
+            canvas.drawLine(1f, 0f, 1f, measuredHeight.toFloat(), paint)
+    }
+
+    fun setAccentVisibility(yes: Boolean) {
+        showAccent = yes
+    }
+
+    fun setHighlight(type: Int) {
+        setBackgroundColor(highlightColors[type])
+    }
+
+    companion object {
+        val HIGHLIGHT_NONE = 0
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/DialogHelper.java b/app/src/main/java/net/lacolaco/smileessence/view/DialogHelper.kt
index 3a0003d6..c9b4a428 100644
--- a/app/src/main/java/net/lacolaco/smileessence/view/DialogHelper.java
+++ b/app/src/main/java/net/lacolaco/smileessence/view/DialogHelper.kt
@@ -22,38 +22,38 @@
  * SOFTWARE.
  */
 
-package net.lacolaco.smileessence.view;
+package net.lacolaco.smileessence.view
 
-import android.app.Activity;
-import net.lacolaco.smileessence.view.dialog.StackableDialogFragment;
+import android.app.Activity
+import net.lacolaco.smileessence.view.dialog.StackableDialogFragment
 
-import java.util.ArrayList;
-import java.util.LinkedHashSet;
-import java.util.Set;
-import java.util.UUID;
+import java.util.ArrayList
+import java.util.LinkedHashSet
+import java.util.UUID
 
 /**
  * DialogFragment のタグの一覧を保持し「全てのダイアログを閉じる」機能を提供するヘルパークラス
  */
-public class DialogHelper {
-    private static Set<String> dialogStack = new LinkedHashSet<>();
+object DialogHelper {
+    private val dialogStack = LinkedHashSet<String>()
 
-    public synchronized static void closeAll(Activity activity) {
-        for (String tag : new ArrayList<>(dialogStack)) {
-            StackableDialogFragment dialogFragment = (StackableDialogFragment) activity.getFragmentManager().findFragmentByTag(tag);
-            if (dialogFragment != null) {
-                dialogFragment.dismiss();
-            }
+    @Synchronized
+    fun closeAll(activity: Activity) {
+        for (tag in ArrayList(dialogStack)) {
+            val dialogFragment = activity.fragmentManager.findFragmentByTag(tag) as StackableDialogFragment?
+            dialogFragment?.dismiss()
         }
     }
 
-    public synchronized static int showDialog(Activity activity, StackableDialogFragment dialogFragment) {
-        String tag = "stackingDialog:" + dialogFragment.getClass().getSimpleName() + ":" + UUID.randomUUID();
-        dialogStack.add(tag);
-        return dialogFragment.show(activity.getFragmentManager().beginTransaction(), tag);
+    @Synchronized
+    fun showDialog(activity: Activity, dialogFragment: StackableDialogFragment): Int {
+        val tag = "stackingDialog:" + dialogFragment.javaClass.simpleName + ":" + UUID.randomUUID()
+        dialogStack.add(tag)
+        return dialogFragment.show(activity.fragmentManager.beginTransaction(), tag)
     }
 
-    public synchronized static void unregisterDialog(String tag) {
-        dialogStack.remove(tag);
+    @Synchronized
+    fun unregisterDialog(tag: String) {
+        dialogStack.remove(tag)
     }
 }
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ExpandedListView.java b/app/src/main/java/net/lacolaco/smileessence/view/ExpandedListView.java
deleted file mode 100644
index e0a4a651..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/ExpandedListView.java
+++ /dev/null
@@ -1,29 +0,0 @@
-package net.lacolaco.smileessence.view;
-
-import android.content.Context;
-import android.util.AttributeSet;
-import android.view.ViewGroup;
-import android.widget.ListView;
-
-public class ExpandedListView extends ListView {
-    public ExpandedListView(Context context) {
-        super(context);
-    }
-
-    public ExpandedListView(Context context, AttributeSet attrs) {
-        super(context, attrs);
-    }
-
-    public ExpandedListView(Context context, AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-    }
-
-    @Override
-    public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2, MeasureSpec.AT_MOST);
-        super.onMeasure(widthMeasureSpec, expandSpec);
-
-        ViewGroup.LayoutParams params = getLayoutParams();
-        params.height = getMeasuredHeight();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ExpandedListView.kt b/app/src/main/java/net/lacolaco/smileessence/view/ExpandedListView.kt
new file mode 100644
index 00000000..288354ba
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/ExpandedListView.kt
@@ -0,0 +1,23 @@
+package net.lacolaco.smileessence.view
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ListView
+
+class ExpandedListView : ListView {
+    constructor(context: Context) : super(context)
+
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
+
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
+
+    public override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
+        val expandSpec = View.MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE shr 2, View.MeasureSpec.AT_MOST)
+        super.onMeasure(widthMeasureSpec, expandSpec)
+
+        val params = layoutParams
+        params.height = measuredHeight
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/Partials.java b/app/src/main/java/net/lacolaco/smileessence/view/Partials.java
deleted file mode 100644
index fc0e35cb..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/Partials.java
+++ /dev/null
@@ -1,229 +0,0 @@
-package net.lacolaco.smileessence.view;
-
-import android.app.Activity;
-import android.text.Html;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.ListView;
-import android.widget.TextView;
-import com.android.volley.toolbox.NetworkImageView;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.data.Account;
-import net.lacolaco.smileessence.data.ImageCache;
-import net.lacolaco.smileessence.entity.DirectMessage;
-import net.lacolaco.smileessence.entity.RBinding;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.preference.UserPreferenceHelper;
-import net.lacolaco.smileessence.util.StringUtils;
-import net.lacolaco.smileessence.util.UIObserverBundle;
-import net.lacolaco.smileessence.view.adapter.CustomListAdapter;
-import net.lacolaco.smileessence.view.dialog.MessageDetailDialogFragment;
-import net.lacolaco.smileessence.view.dialog.StatusDetailDialogFragment;
-import net.lacolaco.smileessence.view.dialog.UserDetailDialogFragment;
-import net.lacolaco.smileessence.view.listener.ListItemClickListener;
-
-import java.lang.ref.WeakReference;
-import java.util.ArrayList;
-import java.util.List;
-
-public class Partials {
-    public static View getTweetView(Tweet tweet, Activity activity, View convertView, boolean expandEmbeddedTweets) {
-        if (convertView == null) {
-            convertView = activity.getLayoutInflater().inflate(R.layout.list_item_status, null);
-        }
-        UIObserverBundle bundle = (UIObserverBundle) convertView.getTag();
-        if (bundle != null) {
-            bundle.detachAll();
-        } else {
-            bundle = new UIObserverBundle();
-            convertView.setTag(bundle);
-        }
-
-        convertView.setOnClickListener(new ListItemClickListener(activity, () -> DialogHelper.showDialog(activity, StatusDetailDialogFragment.newInstance(tweet))));
-
-        updateViewUser(tweet, activity, convertView);
-        updateViewBody(tweet, activity, convertView);
-        updateViewFavorited(tweet, convertView);
-        updateViewEmbeddeds(tweet, activity, convertView, expandEmbeddedTweets);
-
-        final WeakReference<View> weakView = new WeakReference<>(convertView);
-        final WeakReference<Activity> weakActivity = new WeakReference<>(activity);
-        bundle.attach(tweet.getOriginalTweet(), changes -> {
-            View strongView = weakView.get();
-            if (strongView != null && changes.contains(RBinding.FAVORITERS))
-                updateViewFavorited(tweet, strongView);
-        });
-        bundle.attach(tweet.getUser(), changes -> {
-            View strongView = weakView.get();
-            Activity strongActivity = weakActivity.get();
-            if (strongView != null && strongActivity != null && changes.contains(RBinding.BASIC))
-                updateViewUser(tweet, strongActivity, strongView);
-        });
-
-        return convertView;
-    }
-
-
-    private static void updateViewEmbeddeds(Tweet tweet, Activity activity, View convertView, boolean expandEmbeddedTweets) {
-        final ListView embeddedStatus = (ListView) convertView.findViewById(R.id.listview_status_embedded_status);
-        if (expandEmbeddedTweets) {
-            final List<Tweet> list = new ArrayList<>();
-            CustomListAdapter<Tweet> embeddedTweetsAdapter = new CustomListAdapter<Tweet>() {
-                @Override
-                protected List<Tweet> getList() {
-                    return list;
-                }
-
-                @Override
-                public View getView(int position, View convertView, ViewGroup parent) {
-                    return Partials.getTweetView(getItem(position), activity, convertView, false);
-                }
-            };
-
-            Account account = Application.getCurrentWorld().getAccount();
-            for (long id : tweet.getEmbeddedStatusIDs()) {
-                Tweet.fetchTask(id, account).onDone(t -> list.add(t)).execute();
-            }
-            embeddedStatus.setAdapter(embeddedTweetsAdapter);
-            embeddedStatus.setVisibility(View.VISIBLE);
-        } else {
-            embeddedStatus.setAdapter(null); // view may be reused, set null explicitly
-            embeddedStatus.setVisibility(View.GONE);
-        }
-    }
-
-    private static void updateViewUser(Tweet tweet, Activity activity, View convertView) {
-        int textSize = UserPreferenceHelper.getInstance().getTextSize();
-
-        NetworkImageView icon = (NetworkImageView) convertView.findViewById(R.id.imageview_status_icon);
-        String iconUrl = tweet.getOriginalTweet().getUser().getProfileImageUrlOriginal();
-        icon.setImageUrl(iconUrl, ImageCache.getImageLoader());
-        icon.setOnClickListener(v -> onIconClick(tweet, activity));
-
-        TextView header = (TextView) convertView.findViewById(R.id.textview_status_header);
-        header.setTextSize(textSize);
-        header.setText(tweet.getOriginalTweet().getUser().getFormattedName());
-
-        ((ColoredRelativeLayout) convertView).setAccentVisibility(tweet.getUser() == Application.getCurrentWorld().getAccount().getUser());
-    }
-
-    private static void updateViewBody(Tweet tweet, Activity activity, View convertView) {
-        int textSize = UserPreferenceHelper.getInstance().getTextSize();
-
-        TextView content = (TextView) convertView.findViewById(R.id.textview_status_text);
-        content.setTextSize(textSize);
-        String rawText = tweet.getOriginalTweet().getText();
-        content.setText(rawText);
-        TextView footer = (TextView) convertView.findViewById(R.id.textview_status_footer);
-        footer.setTextSize(textSize - 2);
-        footer.setText(getFooterText(tweet));
-
-        ColoredRelativeLayout typedView = (ColoredRelativeLayout) convertView;
-        if (tweet.isRetweet()) {
-            typedView.setHighlight(2);
-        } else if (tweet.getOriginalTweet().getMentions().contains(Application.getCurrentWorld().getAccount().getUser().getScreenName())) {
-            typedView.setHighlight(1);
-        } else {
-            typedView.setHighlight(0);
-        }
-    }
-
-    private static void updateViewFavorited(Tweet tweet, View convertView) {
-        ImageView favorited = (ImageView) convertView.findViewById(R.id.imageview_status_favorited);
-        favorited.setVisibility(tweet.isFavoritedBy(Application.getCurrentWorld().getAccount().getUserId()) ? View.VISIBLE : View.GONE);
-    }
-
-    private static void onIconClick(Tweet tweet, Activity activity) {
-        UserDetailDialogFragment dialogFragment = new UserDetailDialogFragment();
-        dialogFragment.setUserID(tweet.getOriginalTweet().getUser().getId());
-        DialogHelper.showDialog(activity, dialogFragment);
-    }
-
-    private static String getFooterText(Tweet tweet) {
-        StringBuilder builder = new StringBuilder();
-        if (tweet.isRetweet()) {
-            builder
-                    .append("(RT: ")
-                    .append(tweet.getUser().getScreenName())
-                    .append(") ");
-        }
-        builder.append(StringUtils.dateToString(tweet.getOriginalTweet().getCreatedAt()));
-        builder.append(" via ");
-        builder.append(Html.fromHtml(tweet.getOriginalTweet().getSource()));
-        return builder.toString();
-    }
-    
-    public static View getDirectMessageView(DirectMessage directMessage, Activity activity, View convertView) {
-        if (convertView == null) {
-            convertView = activity.getLayoutInflater().inflate(R.layout.list_item_status, null);
-        }
-        UIObserverBundle bundle = (UIObserverBundle) convertView.getTag();
-        if (bundle != null) {
-            bundle.detachAll();
-        } else {
-            bundle = new UIObserverBundle();
-            convertView.setTag(bundle);
-        }
-
-        convertView.setOnClickListener(new ListItemClickListener(activity, () -> DialogHelper.showDialog(activity, MessageDetailDialogFragment.newInstance(directMessage))));
-
-        ImageView favorited = (ImageView) convertView.findViewById(R.id.imageview_status_favorited);
-        favorited.setVisibility(View.GONE);
-
-        updateViewSender(directMessage, activity, convertView);
-        updateViewBody(directMessage, activity, convertView);
-
-        final WeakReference<View> weakView = new WeakReference<>(convertView);
-        final WeakReference<MainActivity> weakActivity = new WeakReference<>((MainActivity) activity);
-        bundle.attach(directMessage.getSender(), changes -> {
-            View strongView = weakView.get();
-            MainActivity strongActivity = weakActivity.get();
-            if (strongView != null && strongActivity != null && changes.contains(RBinding.BASIC))
-                updateViewSender(directMessage, strongActivity, strongView);
-        });
-
-        return convertView;
-    }
-
-    private static String getFooterText(DirectMessage directMessage, Account account) {
-        StringBuilder builder = new StringBuilder();
-        builder.append(StringUtils.dateToString(directMessage.getCreatedAt()));
-        if (directMessage.getSender().getId() == account.getUserId()) {
-            builder.append(" to @").append(directMessage.getRecipient().getScreenName());
-        }
-        return builder.toString();
-    }
-
-    private static void updateViewSender(DirectMessage directMessage, Activity activity, View convertView) {
-        int textSize = UserPreferenceHelper.getInstance().getTextSize();
-
-        NetworkImageView icon = (NetworkImageView) convertView.findViewById(R.id.imageview_status_icon);
-        String iconUrl = directMessage.getSender().getProfileImageUrlOriginal();
-        icon.setImageUrl(iconUrl, ImageCache.getImageLoader());
-        icon.setOnClickListener(v -> {
-            UserDetailDialogFragment dialogFragment = new UserDetailDialogFragment();
-            dialogFragment.setUserID(directMessage.getSender().getId());
-            DialogHelper.showDialog(activity, dialogFragment);
-        });
-
-        TextView header = (TextView) convertView.findViewById(R.id.textview_status_header);
-        header.setTextSize(textSize);
-        header.setText(directMessage.getSender().getFormattedName());
-
-        ((ColoredRelativeLayout) convertView).setAccentVisibility(directMessage.getSender() == Application.getCurrentWorld().getAccount().getUser());
-    }
-
-    private static void updateViewBody(DirectMessage directMessage, Activity activity, View convertView) {
-        int textSize = UserPreferenceHelper.getInstance().getTextSize();
-
-        TextView content = (TextView) convertView.findViewById(R.id.textview_status_text);
-        content.setTextSize(textSize);
-        content.setText(directMessage.getText());
-        TextView footer = (TextView) convertView.findViewById(R.id.textview_status_footer);
-        footer.setTextSize(textSize - 2);
-        footer.setText(getFooterText(directMessage, Application.getCurrentWorld().getAccount()));
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/Partials.kt b/app/src/main/java/net/lacolaco/smileessence/view/Partials.kt
new file mode 100644
index 00000000..27d8c3cd
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/Partials.kt
@@ -0,0 +1,220 @@
+package net.lacolaco.smileessence.view
+
+import android.app.Activity
+import android.text.Html
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.ListView
+import android.widget.TextView
+import com.android.volley.toolbox.NetworkImageView
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.data.Account
+import net.lacolaco.smileessence.data.ImageCache
+import net.lacolaco.smileessence.entity.DirectMessage
+import net.lacolaco.smileessence.entity.RBinding
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.preference.UserPreferenceHelper
+import net.lacolaco.smileessence.util.StringUtils
+import net.lacolaco.smileessence.util.UIObserverBundle
+import net.lacolaco.smileessence.view.adapter.CustomListAdapter
+import net.lacolaco.smileessence.view.dialog.MessageDetailDialogFragment
+import net.lacolaco.smileessence.view.dialog.StatusDetailDialogFragment
+import net.lacolaco.smileessence.view.dialog.UserDetailDialogFragment
+import net.lacolaco.smileessence.view.listener.ListItemClickListener
+
+import java.lang.ref.WeakReference
+import java.util.ArrayList
+
+object Partials {
+    fun getTweetView(tweet: Tweet, activity: Activity, convertView: View?, expandEmbeddedTweets: Boolean): View {
+        var convertView: View = convertView ?: activity.layoutInflater.inflate(R.layout.list_item_status, null)
+        var bundle: UIObserverBundle? = convertView.tag as UIObserverBundle?
+        if (bundle != null) {
+            bundle.detachAll()
+        } else {
+            bundle = UIObserverBundle()
+            convertView.tag = bundle
+        }
+
+        convertView.setOnClickListener(ListItemClickListener(activity) { DialogHelper.showDialog(activity, StatusDetailDialogFragment.newInstance(tweet)) })
+
+        updateViewUser(tweet, activity, convertView)
+        updateViewBody(tweet, activity, convertView)
+        updateViewFavorited(tweet, convertView)
+        updateViewEmbeddeds(tweet, activity, convertView, expandEmbeddedTweets)
+
+        val weakView = WeakReference(convertView)
+        val weakActivity = WeakReference(activity)
+        bundle.attach(tweet.originalTweet) { changes ->
+            val strongView = weakView.get()
+            if (strongView != null && changes.contains(RBinding.FAVORITERS))
+                updateViewFavorited(tweet, strongView)
+        }
+        bundle.attach(tweet.user) { changes ->
+            val strongView = weakView.get()
+            val strongActivity = weakActivity.get()
+            if (strongView != null && strongActivity != null && changes.contains(RBinding.BASIC))
+                updateViewUser(tweet, strongActivity, strongView)
+        }
+
+        return convertView
+    }
+
+
+    private fun updateViewEmbeddeds(tweet: Tweet, activity: Activity, convertView: View, expandEmbeddedTweets: Boolean) {
+        val embeddedStatus = convertView.findViewById(R.id.listview_status_embedded_status) as ListView
+        if (expandEmbeddedTweets) {
+            val list = ArrayList<Tweet>()
+            val embeddedTweetsAdapter = object : CustomListAdapter<Tweet>() {
+                override val list: List<Tweet>
+                    get() = list
+
+                override fun getView(position: Int, convertView: View, parent: ViewGroup): View {
+                    return Partials.getTweetView(getItem(position), activity, convertView, false)
+                }
+            }
+
+            val account = Application.currentWorld!!.account
+            for (id in tweet.embeddedStatusIDs) {
+                Tweet.fetchTask(id, account).onDone { t -> list.add(t) }.execute()
+            }
+            embeddedStatus.adapter = embeddedTweetsAdapter
+            embeddedStatus.visibility = View.VISIBLE
+        } else {
+            embeddedStatus.adapter = null // view may be reused, set null explicitly
+            embeddedStatus.visibility = View.GONE
+        }
+    }
+
+    private fun updateViewUser(tweet: Tweet, activity: Activity, convertView: View) {
+        val textSize = UserPreferenceHelper.instance.textSize
+
+        val icon = convertView.findViewById(R.id.imageview_status_icon) as NetworkImageView
+        val iconUrl = tweet.originalTweet.user.profileImageUrl
+        icon.setImageUrl(iconUrl, ImageCache.getImageLoader())
+        icon.setOnClickListener { v -> onIconClick(tweet, activity) }
+
+        val header = convertView.findViewById(R.id.textview_status_header) as TextView
+        header.textSize = textSize.toFloat()
+        header.text = tweet.originalTweet.user.formattedName
+
+        (convertView as ColoredRelativeLayout).setAccentVisibility(tweet.user === Application.currentWorld!!.account.user)
+    }
+
+    private fun updateViewBody(tweet: Tweet, activity: Activity, convertView: View) {
+        val textSize = UserPreferenceHelper.instance.textSize
+
+        val content = convertView.findViewById(R.id.textview_status_text) as TextView
+        content.textSize = textSize.toFloat()
+        val rawText = tweet.originalTweet.text
+        content.text = rawText
+        val footer = convertView.findViewById(R.id.textview_status_footer) as TextView
+        footer.textSize = (textSize - 2).toFloat()
+        footer.text = getFooterText(tweet)
+
+        val typedView = convertView as ColoredRelativeLayout
+        if (tweet.isRetweet) {
+            typedView.setHighlight(2)
+        } else if (tweet.originalTweet.mentions.contains(Application.currentWorld!!.account.user.screenName)) {
+            typedView.setHighlight(1)
+        } else {
+            typedView.setHighlight(0)
+        }
+    }
+
+    private fun updateViewFavorited(tweet: Tweet, convertView: View) {
+        val favorited = convertView.findViewById(R.id.imageview_status_favorited) as ImageView
+        favorited.visibility = if (tweet.isFavoritedBy(Application.currentWorld!!.account.userId)) View.VISIBLE else View.GONE
+    }
+
+    private fun onIconClick(tweet: Tweet, activity: Activity) {
+        DialogHelper.showDialog(activity, UserDetailDialogFragment.newInstance(tweet.originalTweet.user))
+    }
+
+    private fun getFooterText(tweet: Tweet): String {
+        val builder = StringBuilder()
+        if (tweet.isRetweet) {
+            builder
+                    .append("(RT: ")
+                    .append(tweet.user.screenName)
+                    .append(") ")
+        }
+        builder.append(StringUtils.dateToString(tweet.originalTweet.createdAt))
+        builder.append(" via ")
+        builder.append(Html.fromHtml(tweet.originalTweet.source))
+        return builder.toString()
+    }
+
+    fun getDirectMessageView(directMessage: DirectMessage, activity: Activity, convertView: View?): View {
+        var convertView = convertView
+        if (convertView == null) {
+            convertView = activity.layoutInflater.inflate(R.layout.list_item_status, null)
+        }
+        var bundle: UIObserverBundle? = convertView!!.tag as UIObserverBundle?
+        if (bundle != null) {
+            bundle.detachAll()
+        } else {
+            bundle = UIObserverBundle()
+            convertView.tag = bundle
+        }
+
+        convertView.setOnClickListener(ListItemClickListener(activity) { DialogHelper.showDialog(activity, MessageDetailDialogFragment.newInstance(directMessage)) })
+
+        val favorited = convertView.findViewById(R.id.imageview_status_favorited) as ImageView
+        favorited.visibility = View.GONE
+
+        updateViewSender(directMessage, activity, convertView)
+        updateViewBody(directMessage, activity, convertView)
+
+        val weakView = WeakReference(convertView)
+        val weakActivity = WeakReference(activity as MainActivity)
+        bundle.attach(directMessage.sender) { changes ->
+            val strongView = weakView.get()
+            val strongActivity = weakActivity.get()
+            if (strongView != null && strongActivity != null && changes.contains(RBinding.BASIC))
+                updateViewSender(directMessage, strongActivity, strongView)
+        }
+
+        return convertView
+    }
+
+    private fun getFooterText(directMessage: DirectMessage, account: Account): String {
+        val builder = StringBuilder()
+        builder.append(StringUtils.dateToString(directMessage.createdAt))
+        if (directMessage.sender.id == account.userId) {
+            builder.append(" to @").append(directMessage.recipient.screenName)
+        }
+        return builder.toString()
+    }
+
+    private fun updateViewSender(directMessage: DirectMessage, activity: Activity, convertView: View) {
+        val textSize = UserPreferenceHelper.instance.textSize
+
+        val icon = convertView.findViewById(R.id.imageview_status_icon) as NetworkImageView
+        val iconUrl = directMessage.sender.profileImageUrl
+        icon.setImageUrl(iconUrl, ImageCache.getImageLoader())
+        icon.setOnClickListener { v ->
+            DialogHelper.showDialog(activity, UserDetailDialogFragment.newInstance(directMessage.sender))
+        }
+
+        val header = convertView.findViewById(R.id.textview_status_header) as TextView
+        header.textSize = textSize.toFloat()
+        header.text = directMessage.sender.formattedName
+
+        (convertView as ColoredRelativeLayout).setAccentVisibility(directMessage.sender === Application.currentWorld!!.account.user)
+    }
+
+    private fun updateViewBody(directMessage: DirectMessage, activity: Activity, convertView: View) {
+        val textSize = UserPreferenceHelper.instance.textSize
+
+        val content = convertView.findViewById(R.id.textview_status_text) as TextView
+        content.textSize = textSize.toFloat()
+        content.text = directMessage.text
+        val footer = convertView.findViewById(R.id.textview_status_footer) as TextView
+        footer.textSize = (textSize - 2).toFloat()
+        footer.text = getFooterText(directMessage, Application.currentWorld!!.account)
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/SettingFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/SettingFragment.java
deleted file mode 100644
index 7ed9636b..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/SettingFragment.java
+++ /dev/null
@@ -1,147 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view;
-
-import android.app.AlertDialog;
-import android.content.Intent;
-import android.content.SharedPreferences;
-import android.os.Bundle;
-import android.preference.EditTextPreference;
-import android.preference.ListPreference;
-import android.preference.Preference;
-import android.preference.PreferenceFragment;
-import android.text.TextUtils;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.widget.TextView;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.BuildConfig;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.LicenseActivity;
-
-import static android.content.SharedPreferences.OnSharedPreferenceChangeListener;
-
-public class SettingFragment extends PreferenceFragment implements OnSharedPreferenceChangeListener,
-        Preference.OnPreferenceChangeListener, Preference.OnPreferenceClickListener {
-    @Override
-    public boolean onPreferenceChange(Preference preference, Object newValue) {
-        String newValueStr = String.valueOf(newValue);
-        if (preference.getKey().contentEquals(getString(R.string.key_setting_text_size))) {
-            if (TextUtils.isDigitsOnly(newValueStr)) {
-                return true;
-            } else {
-                Application.toast(R.string.error_setting_text_size_not_number);
-            }
-            return false;
-        } else if (preference.getKey().contentEquals(getString(R.string.key_setting_theme))) {
-            Application.toast(R.string.notice_theme_changed);
-        }
-        return true;
-    }
-
-    // --------------------- Interface OnPreferenceClickListener ---------------------
-
-    @Override
-    public boolean onPreferenceClick(Preference preference) {
-        String key = preference.getKey();
-        if (key.contentEquals(getString(R.string.key_setting_application_information))) {
-            openAppInfoDialog();
-        } else if (key.contentEquals(getString(R.string.key_setting_licenses))) {
-            openLicenseActivity();
-        }
-        return true;
-    }
-
-    // --------------------- Interface OnSharedPreferenceChangeListener ---------------------
-
-    @Override
-    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
-        setSummaryCurrentValue();
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        addPreferencesFromResource(R.xml.setting);
-        EditTextPreference textSizePreference = (EditTextPreference) findPreference(R.string.key_setting_text_size);
-        textSizePreference.setSummary(textSizePreference.getText());
-        textSizePreference.setOnPreferenceChangeListener(this);
-        ListPreference themePreference = (ListPreference) findPreference(R.string.key_setting_theme);
-        themePreference.setSummary(themePreference.getEntry());
-        themePreference.setOnPreferenceChangeListener(this);
-        Preference appInfoPreference = findPreference(R.string.key_setting_application_information);
-        appInfoPreference.setOnPreferenceClickListener(this);
-        appInfoPreference.setSummary(BuildConfig.VERSION_NAME + " (" + BuildConfig.VERSION_CODE + ")");
-        Preference license = findPreference(R.string.key_setting_licenses);
-        license.setOnPreferenceClickListener(this);
-    }
-
-    @Override
-    public void onPause() {
-        super.onPause();
-        SharedPreferences sharedPreferences = getPreferenceScreen().getSharedPreferences();
-        sharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
-    }
-
-    @Override
-    public void onResume() {
-        super.onResume();
-        SharedPreferences sharedPreferences = getPreferenceScreen().getSharedPreferences();
-        sharedPreferences.registerOnSharedPreferenceChangeListener(this);
-    }
-
-    // -------------------------- OTHER METHODS --------------------------
-
-    public Preference findPreference(int preferenceResID) {
-        return findPreference(getString(preferenceResID));
-    }
-
-    private void openLicenseActivity() {
-        Intent intent = new Intent(getActivity(), LicenseActivity.class);
-        getActivity().startActivity(intent);
-    }
-
-    private void openAppInfoDialog() {
-        LayoutInflater inflater = getActivity().getLayoutInflater();
-        View contentView = inflater.inflate(R.layout.dialog_app_info, null);
-        TextView versionTextView = (TextView) contentView.findViewById(R.id.versionTextView);
-        versionTextView.setText(BuildConfig.VERSION_NAME + " (rev: " + BuildConfig.VERSION_CODE + "; upstream: " + getString(R.string.app_version_full) + ")");
-
-        new AlertDialog.Builder(getActivity())
-                .setTitle(R.string.dialog_title_about)
-                .setView(contentView)
-                .setPositiveButton(R.string.alert_dialog_ok, (dialog, which) -> dialog.dismiss())
-                .create().show();
-    }
-
-    private void setSummaryCurrentValue() {
-        EditTextPreference textSizePreference = (EditTextPreference) findPreference(R.string.key_setting_text_size);
-        textSizePreference.setSummary(textSizePreference.getText());
-        ListPreference themePreference = (ListPreference) findPreference(R.string.key_setting_theme);
-        themePreference.setSummary(themePreference.getEntry());
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/SettingFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/SettingFragment.kt
new file mode 100644
index 00000000..05490f97
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/SettingFragment.kt
@@ -0,0 +1,140 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view
+
+import android.app.AlertDialog
+import android.content.Intent
+import android.content.SharedPreferences
+import android.os.Bundle
+import android.preference.EditTextPreference
+import android.preference.ListPreference
+import android.preference.Preference
+import android.preference.PreferenceFragment
+import android.text.TextUtils
+import android.view.LayoutInflater
+import android.view.View
+import android.widget.TextView
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.BuildConfig
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.LicenseActivity
+
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener
+
+class SettingFragment : PreferenceFragment(), OnSharedPreferenceChangeListener, Preference.OnPreferenceChangeListener, Preference.OnPreferenceClickListener {
+    override fun onPreferenceChange(preference: Preference, newValue: Any): Boolean {
+        val newValueStr = newValue.toString()
+        if (preference.key.contentEquals(getString(R.string.key_setting_text_size))) {
+            if (TextUtils.isDigitsOnly(newValueStr)) {
+                return true
+            } else {
+                Application.toast(R.string.error_setting_text_size_not_number)
+            }
+            return false
+        } else if (preference.key.contentEquals(getString(R.string.key_setting_theme))) {
+            Application.toast(R.string.notice_theme_changed)
+        }
+        return true
+    }
+
+    // --------------------- Interface OnPreferenceClickListener ---------------------
+
+    override fun onPreferenceClick(preference: Preference): Boolean {
+        val key = preference.key
+        if (key.contentEquals(getString(R.string.key_setting_application_information))) {
+            openAppInfoDialog()
+        } else if (key.contentEquals(getString(R.string.key_setting_licenses))) {
+            openLicenseActivity()
+        }
+        return true
+    }
+
+    // --------------------- Interface OnSharedPreferenceChangeListener ---------------------
+
+    override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences, key: String) {
+        setSummaryCurrentValue()
+    }
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        addPreferencesFromResource(R.xml.setting)
+        val textSizePreference = findPreference(R.string.key_setting_text_size) as EditTextPreference
+        textSizePreference.summary = textSizePreference.text
+        textSizePreference.onPreferenceChangeListener = this
+        val themePreference = findPreference(R.string.key_setting_theme) as ListPreference
+        themePreference.summary = themePreference.entry
+        themePreference.onPreferenceChangeListener = this
+        val appInfoPreference = findPreference(R.string.key_setting_application_information)
+        appInfoPreference.onPreferenceClickListener = this
+        appInfoPreference.summary = BuildConfig.VERSION_NAME + " (" + BuildConfig.VERSION_CODE + ")"
+        val license = findPreference(R.string.key_setting_licenses)
+        license.onPreferenceClickListener = this
+    }
+
+    override fun onPause() {
+        super.onPause()
+        val sharedPreferences = preferenceScreen.sharedPreferences
+        sharedPreferences.unregisterOnSharedPreferenceChangeListener(this)
+    }
+
+    override fun onResume() {
+        super.onResume()
+        val sharedPreferences = preferenceScreen.sharedPreferences
+        sharedPreferences.registerOnSharedPreferenceChangeListener(this)
+    }
+
+    // -------------------------- OTHER METHODS --------------------------
+
+    fun findPreference(preferenceResID: Int): Preference {
+        return findPreference(getString(preferenceResID))
+    }
+
+    private fun openLicenseActivity() {
+        val intent = Intent(activity, LicenseActivity::class.java)
+        activity.startActivity(intent)
+    }
+
+    private fun openAppInfoDialog() {
+        val inflater = activity.layoutInflater
+        val contentView = inflater.inflate(R.layout.dialog_app_info, null)
+        val versionTextView = contentView.findViewById(R.id.versionTextView) as TextView
+        versionTextView.text = BuildConfig.VERSION_NAME + " (rev: " + BuildConfig.VERSION_CODE + "; upstream: " + getString(R.string.app_version_full) + ")"
+
+        AlertDialog.Builder(activity)
+                .setTitle(R.string.dialog_title_about)
+                .setView(contentView)
+                .setPositiveButton(R.string.alert_dialog_ok) { dialog, which -> dialog.dismiss() }
+                .create().show()
+    }
+
+    private fun setSummaryCurrentValue() {
+        val textSizePreference = findPreference(R.string.key_setting_text_size) as EditTextPreference
+        textSizePreference.summary = textSizePreference.text
+        val themePreference = findPreference(R.string.key_setting_theme) as ListPreference
+        themePreference.summary = themePreference.entry
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ThreeStateButton.java b/app/src/main/java/net/lacolaco/smileessence/view/ThreeStateButton.java
deleted file mode 100644
index d5358db5..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/ThreeStateButton.java
+++ /dev/null
@@ -1,56 +0,0 @@
-package net.lacolaco.smileessence.view;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.drawable.Drawable;
-import android.util.AttributeSet;
-import android.widget.Button;
-import net.lacolaco.smileessence.R;
-
-public class ThreeStateButton extends Button {
-    public static final int STATE_OFF = 0;
-    public static final int STATE_ON = 1;
-    public static final int STATE_LOCKED = 2;
-
-    private int state = STATE_OFF;
-    private String texts[] = new String[3];
-    private Drawable backgrounds[] = new Drawable[3];
-
-    public ThreeStateButton(Context context) {
-        this(context, null);
-    }
-
-    public ThreeStateButton(Context context, AttributeSet attrs) {
-        this(context, attrs, android.R.attr.buttonStyle);
-    }
-
-    public ThreeStateButton(Context context, AttributeSet attrs, int defStyleAttr) {
-        this(context, attrs, defStyleAttr, 0);
-    }
-
-    public ThreeStateButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-
-        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ThreeStateButton);
-        texts[STATE_OFF] = ta.getString(R.styleable.ThreeStateButton_off_text);
-        texts[STATE_ON] = ta.getString(R.styleable.ThreeStateButton_on_text);
-        texts[STATE_LOCKED] = ta.getString(R.styleable.ThreeStateButton_locked_text);
-        backgrounds[STATE_OFF] = ta.getDrawable(R.styleable.ThreeStateButton_off_background);
-        backgrounds[STATE_ON] = ta.getDrawable(R.styleable.ThreeStateButton_on_background);
-        backgrounds[STATE_LOCKED] = ta.getDrawable(R.styleable.ThreeStateButton_locked_background);
-        ta.recycle();
-
-        setState(STATE_OFF);
-    }
-
-    public int getState() {
-        return state;
-    }
-
-    public void setState(int s) {
-        state = s;
-        setText(texts[state]);
-        setBackground(backgrounds[state]);
-        setEnabled(state != STATE_LOCKED);
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ThreeStateButton.kt b/app/src/main/java/net/lacolaco/smileessence/view/ThreeStateButton.kt
new file mode 100644
index 00000000..547aa84d
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/ThreeStateButton.kt
@@ -0,0 +1,41 @@
+package net.lacolaco.smileessence.view
+
+import android.content.Context
+import android.content.res.TypedArray
+import android.graphics.drawable.Drawable
+import android.util.AttributeSet
+import android.widget.Button
+import net.lacolaco.smileessence.R
+
+class ThreeStateButton @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = android.R.attr.buttonStyle, defStyleRes: Int = 0) : Button(context, attrs, defStyleAttr, defStyleRes) {
+
+    var state = STATE_OFF
+        set(s) {
+            field = s
+            text = texts[this.state]
+            background = backgrounds[this.state]
+            isEnabled = this.state != STATE_LOCKED
+        }
+    private val texts = arrayOfNulls<String>(3)
+    private val backgrounds = arrayOfNulls<Drawable>(3)
+
+    init {
+
+        val ta = context.obtainStyledAttributes(attrs, R.styleable.ThreeStateButton)
+        texts[STATE_OFF] = ta.getString(R.styleable.ThreeStateButton_off_text)
+        texts[STATE_ON] = ta.getString(R.styleable.ThreeStateButton_on_text)
+        texts[STATE_LOCKED] = ta.getString(R.styleable.ThreeStateButton_locked_text)
+        backgrounds[STATE_OFF] = ta.getDrawable(R.styleable.ThreeStateButton_off_background)
+        backgrounds[STATE_ON] = ta.getDrawable(R.styleable.ThreeStateButton_on_background)
+        backgrounds[STATE_LOCKED] = ta.getDrawable(R.styleable.ThreeStateButton_locked_background)
+        ta.recycle()
+
+        state = STATE_OFF
+    }
+
+    companion object {
+        val STATE_OFF = 0
+        val STATE_ON = 1
+        val STATE_LOCKED = 2
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ToggleableImageButton.java b/app/src/main/java/net/lacolaco/smileessence/view/ToggleableImageButton.java
deleted file mode 100644
index b7b2d174..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/ToggleableImageButton.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package net.lacolaco.smileessence.view;
-
-import android.content.Context;
-import android.content.res.TypedArray;
-import android.graphics.drawable.Drawable;
-import android.util.AttributeSet;
-import android.widget.ImageButton;
-import net.lacolaco.smileessence.R;
-
-public class ToggleableImageButton extends ImageButton {
-    private Drawable onSrc, offSrc;
-
-    public ToggleableImageButton(Context context) {
-        this(context, null);
-    }
-
-    public ToggleableImageButton(Context context, AttributeSet attrs) {
-        this(context, attrs, android.R.attr.imageButtonStyle);
-    }
-
-    public ToggleableImageButton(Context context, AttributeSet attrs, int defStyleAttr) {
-        this(context, attrs, defStyleAttr, 0);
-    }
-
-    public ToggleableImageButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-
-        TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.ToggleableImageButton);
-        offSrc = ta.getDrawable(R.styleable.ToggleableImageButton_offSrc);
-        onSrc = ta.getDrawable(R.styleable.ToggleableImageButton_onSrc);
-        ta.recycle();
-    }
-
-    public void setState(boolean isOn) {
-        setImageDrawable(isOn ? onSrc : offSrc);
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/ToggleableImageButton.kt b/app/src/main/java/net/lacolaco/smileessence/view/ToggleableImageButton.kt
new file mode 100644
index 00000000..47a1821a
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/ToggleableImageButton.kt
@@ -0,0 +1,25 @@
+package net.lacolaco.smileessence.view
+
+import android.content.Context
+import android.content.res.TypedArray
+import android.graphics.drawable.Drawable
+import android.util.AttributeSet
+import android.widget.ImageButton
+import net.lacolaco.smileessence.R
+
+class ToggleableImageButton @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = android.R.attr.imageButtonStyle, defStyleRes: Int = 0) : ImageButton(context, attrs, defStyleAttr, defStyleRes) {
+    private val onSrc: Drawable
+    private val offSrc: Drawable
+
+    init {
+
+        val ta = context.obtainStyledAttributes(attrs, R.styleable.ToggleableImageButton)
+        offSrc = ta.getDrawable(R.styleable.ToggleableImageButton_offSrc)
+        onSrc = ta.getDrawable(R.styleable.ToggleableImageButton_onSrc)
+        ta.recycle()
+    }
+
+    fun setState(isOn: Boolean) {
+        setImageDrawable(if (isOn) onSrc else offSrc)
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/CustomListAdapter.java b/app/src/main/java/net/lacolaco/smileessence/view/adapter/CustomListAdapter.java
deleted file mode 100644
index 6d7420fb..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/adapter/CustomListAdapter.java
+++ /dev/null
@@ -1,50 +0,0 @@
-package net.lacolaco.smileessence.view.adapter;
-
-import android.widget.BaseAdapter;
-import net.lacolaco.smileessence.util.UIHandler;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-
-public abstract class CustomListAdapter<T> extends BaseAdapter {
-    private boolean isNotifiable = true;
-    private List<T> frozenList = new ArrayList<>();
-
-    public final void setNotifiable(boolean notifiable) {
-        isNotifiable = notifiable;
-    }
-
-    @Override
-    public final int getCount() {
-        return frozenList.size();
-    }
-
-    @Override
-    public final T getItem(int position) {
-        return frozenList.get(position);
-    }
-
-    @Override
-    public long getItemId(int position) {
-        return position;
-    }
-
-    @Override
-    public final void notifyDataSetChanged() {
-        frozenList = Collections.unmodifiableList(getList());
-        super.notifyDataSetChanged();
-    }
-
-    protected abstract List<T> getList();
-
-    public void update() {
-        if (isNotifiable) {
-            updateForce();
-        }
-    }
-
-    public void updateForce() {
-        new UIHandler().post(this::notifyDataSetChanged);
-    }
-}
\ No newline at end of file
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/CustomListAdapter.kt b/app/src/main/java/net/lacolaco/smileessence/view/adapter/CustomListAdapter.kt
new file mode 100644
index 00000000..3b022012
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/adapter/CustomListAdapter.kt
@@ -0,0 +1,45 @@
+package net.lacolaco.smileessence.view.adapter
+
+import android.widget.BaseAdapter
+import net.lacolaco.smileessence.util.UIHandler
+
+import java.util.ArrayList
+import java.util.Collections
+
+abstract class CustomListAdapter<T> : BaseAdapter() {
+    private var isNotifiable = true
+    private var frozenList: List<T> = ArrayList()
+
+    fun setNotifiable(notifiable: Boolean) {
+        isNotifiable = notifiable
+    }
+
+    override fun getCount(): Int {
+        return frozenList.size
+    }
+
+    override fun getItem(position: Int): T {
+        return frozenList[position]
+    }
+
+    override fun getItemId(position: Int): Long {
+        return position.toLong()
+    }
+
+    override fun notifyDataSetChanged() {
+        frozenList = Collections.unmodifiableList(list)
+        super.notifyDataSetChanged()
+    }
+
+    protected abstract val list: List<T>
+
+    fun update() {
+        if (isNotifiable) {
+            updateForce()
+        }
+    }
+
+    fun updateForce() {
+        UIHandler().post { this.notifyDataSetChanged() }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/EventListAdapter.java b/app/src/main/java/net/lacolaco/smileessence/view/adapter/EventListAdapter.java
deleted file mode 100644
index 3f98cfaa..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/adapter/EventListAdapter.java
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.adapter;
-
-import android.app.Activity;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageView;
-import android.widget.TextView;
-import com.android.volley.toolbox.NetworkImageView;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.World;
-import net.lacolaco.smileessence.data.ImageCache;
-import net.lacolaco.smileessence.entity.Event;
-import net.lacolaco.smileessence.entity.RBinding;
-import net.lacolaco.smileessence.preference.UserPreferenceHelper;
-import net.lacolaco.smileessence.util.StringUtils;
-import net.lacolaco.smileessence.util.UIObserverBundle;
-import net.lacolaco.smileessence.view.DialogHelper;
-import net.lacolaco.smileessence.view.dialog.UserDetailDialogFragment;
-import net.lacolaco.smileessence.view.listener.ListItemClickListener;
-
-import java.lang.ref.WeakReference;
-import java.util.List;
-
-public class EventListAdapter extends CustomListAdapter<Event> {
-    private final World world;
-    private final Activity activity;
-
-    public EventListAdapter(World world, Activity activity) {
-        super();
-        this.world = world;
-        this.activity = activity;
-    }
-
-    @Override
-    protected List<Event> getList() {
-        return world.getEvents();
-    }
-
-    @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
-        Event event = getItem(position);
-        if (convertView == null) {
-            convertView = activity.getLayoutInflater().inflate(R.layout.list_item_status, null);
-        }
-        UIObserverBundle bundle = (UIObserverBundle) convertView.getTag();
-        if (bundle != null) {
-            bundle.detachAll();
-        } else {
-            bundle = new UIObserverBundle();
-            convertView.setTag(bundle);
-        }
-
-        int textSize = UserPreferenceHelper.getInstance().getTextSize();
-
-        TextView header = (TextView) convertView.findViewById(R.id.textview_status_header);
-        header.setTextSize(textSize);
-
-        updateViewUser(event, convertView);
-
-        TextView content = (TextView) convertView.findViewById(R.id.textview_status_text);
-        content.setTextSize(textSize);
-        content.setText(event.getTargetObject() != null ? event.getTargetObject().getText() : "");
-        TextView footer = (TextView) convertView.findViewById(R.id.textview_status_footer);
-        footer.setTextSize(textSize - 2);
-        footer.setText(StringUtils.dateToString(event.getCreatedAt()));
-        ImageView favorited = (ImageView) convertView.findViewById(R.id.imageview_status_favorited);
-        favorited.setVisibility(View.GONE);
-        convertView.setOnClickListener(new ListItemClickListener(activity, () -> {
-            UserDetailDialogFragment fragment = new UserDetailDialogFragment();
-            fragment.setUserID(event.getSource().getId());
-            DialogHelper.showDialog(activity, fragment);
-        }));
-
-        final WeakReference<View> weakView = new WeakReference<>(convertView);
-        bundle.attach(event.getSource(), changes -> {
-            View strongView = weakView.get();
-            if (strongView != null && changes.contains(RBinding.BASIC))
-                updateViewUser(event, strongView);
-        });
-
-        return convertView;
-    }
-
-    private void updateViewUser(Event event, View convertedView) {
-        NetworkImageView icon = (NetworkImageView) convertedView.findViewById(R.id.imageview_status_icon);
-        String iconUrl = event.getSource().getProfileImageUrlOriginal();
-        icon.setImageUrl(iconUrl, ImageCache.getImageLoader());
-
-        TextView header = (TextView) convertedView.findViewById(R.id.textview_status_header);
-        header.setText(event.getFormattedString());
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/EventListAdapter.kt b/app/src/main/java/net/lacolaco/smileessence/view/adapter/EventListAdapter.kt
new file mode 100644
index 00000000..1c19d4ec
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/adapter/EventListAdapter.kt
@@ -0,0 +1,102 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.adapter
+
+import android.app.Activity
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageView
+import android.widget.TextView
+import com.android.volley.toolbox.NetworkImageView
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.World
+import net.lacolaco.smileessence.data.ImageCache
+import net.lacolaco.smileessence.entity.Event
+import net.lacolaco.smileessence.entity.RBinding
+import net.lacolaco.smileessence.preference.UserPreferenceHelper
+import net.lacolaco.smileessence.util.StringUtils
+import net.lacolaco.smileessence.util.UIObserverBundle
+import net.lacolaco.smileessence.view.DialogHelper
+import net.lacolaco.smileessence.view.dialog.UserDetailDialogFragment
+import net.lacolaco.smileessence.view.listener.ListItemClickListener
+
+import java.lang.ref.WeakReference
+
+class EventListAdapter(private val world: World, private val activity: Activity) : CustomListAdapter<Event>() {
+    override val list: List<Event>
+        get() = world.events
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        var convertView = convertView
+        val event = getItem(position)
+        if (convertView == null) {
+            convertView = activity.layoutInflater.inflate(R.layout.list_item_status, null)
+        }
+        var bundle: UIObserverBundle? = convertView!!.tag as UIObserverBundle?
+        if (bundle != null) {
+            bundle.detachAll()
+        } else {
+            bundle = UIObserverBundle()
+            convertView.tag = bundle
+        }
+
+        val textSize = UserPreferenceHelper.instance.textSize
+
+        val header = convertView.findViewById(R.id.textview_status_header) as TextView
+        header.textSize = textSize.toFloat()
+
+        updateViewUser(event, convertView)
+
+        val content = convertView.findViewById(R.id.textview_status_text) as TextView
+        content.textSize = textSize.toFloat()
+        content.text = event.targetObject?.text ?: ""
+        val footer = convertView.findViewById(R.id.textview_status_footer) as TextView
+        footer.textSize = (textSize - 2).toFloat()
+        footer.text = StringUtils.dateToString(event.createdAt)
+        val favorited = convertView.findViewById(R.id.imageview_status_favorited) as ImageView
+        favorited.visibility = View.GONE
+        convertView.setOnClickListener(ListItemClickListener(activity) {
+            DialogHelper.showDialog(activity, UserDetailDialogFragment.newInstance(event.source))
+        })
+
+        val weakView = WeakReference(convertView)
+        bundle.attach(event.source) { changes ->
+            val strongView = weakView.get()
+            if (strongView != null && changes.contains(RBinding.BASIC))
+                updateViewUser(event, strongView)
+        }
+
+        return convertView
+    }
+
+    private fun updateViewUser(event: Event, convertedView: View) {
+        val icon = convertedView.findViewById(R.id.imageview_status_icon) as NetworkImageView
+        val iconUrl = event.source.profileImageUrl
+        icon.setImageUrl(iconUrl, ImageCache.getImageLoader())
+
+        val header = convertedView.findViewById(R.id.textview_status_header) as TextView
+        header.text = event.formattedString
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/HistoryFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/adapter/MessageListAdapter.kt
index 5f04114e..d72ab564 100644
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/HistoryFragment.java
+++ b/app/src/main/java/net/lacolaco/smileessence/view/adapter/MessageListAdapter.kt
@@ -22,25 +22,22 @@
  * SOFTWARE.
  */
 
-package net.lacolaco.smileessence.view.page;
+package net.lacolaco.smileessence.view.adapter
 
-import android.os.Bundle;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import net.lacolaco.smileessence.World;
-import net.lacolaco.smileessence.view.adapter.EventListAdapter;
+import android.app.Activity
+import android.view.View
+import android.view.ViewGroup
+import net.lacolaco.smileessence.entity.DirectMessage
+import net.lacolaco.smileessence.view.Partials
 
-public class HistoryFragment extends CustomListFragment<EventListAdapter> {
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
+class MessageListAdapter(private val activity: Activity) : OrderedCustomListAdapter<DirectMessage>() {
+    val lastID: Long
+        get() = if (count > 0) getItem(count - 1).id else -1
 
-        World world = getWorld();
-        final EventListAdapter adapter = new EventListAdapter(world, getActivity());
-        setAdapter(adapter);
-        world.addEventNotifier(this, () -> adapter.update()); // XXX
-    }
+    val topID: Long
+        get() = if (count > 0) getItem(0).id else -1
 
-    @Override
-    public void refresh() {
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        return Partials.getDirectMessageView(getItem(position), activity, convertView)
     }
 }
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/OrderedCustomListAdapter.java b/app/src/main/java/net/lacolaco/smileessence/view/adapter/OrderedCustomListAdapter.java
deleted file mode 100644
index 3de58658..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/adapter/OrderedCustomListAdapter.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package net.lacolaco.smileessence.view.adapter;
-
-import net.lacolaco.smileessence.entity.IdObject;
-
-import java.util.*;
-
-public abstract class OrderedCustomListAdapter<T extends IdObject> extends CustomListAdapter<T> {
-    private final Map<Long, T> treeMap;
-
-    public OrderedCustomListAdapter() {
-        this(Long::compare);
-    }
-
-    public OrderedCustomListAdapter(Comparator<Long> comparator) {
-        super();
-        this.treeMap = new TreeMap<>(Collections.reverseOrder(comparator));
-    }
-
-    @Override
-    protected synchronized List<T> getList() {
-        return new ArrayList<>(treeMap.values());
-    }
-
-    public synchronized void add(T item) {
-        treeMap.put(item.getId(), item);
-    }
-
-    public synchronized void addAll(Collection<T> items) {
-        for (T item : items) {
-            treeMap.put(item.getId(), item);
-        }
-    }
-
-    public synchronized void clear() {
-        treeMap.clear();
-    }
-
-    public synchronized T remove(T item) {
-        return treeMap.remove(item.getId());
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/OrderedCustomListAdapter.kt b/app/src/main/java/net/lacolaco/smileessence/view/adapter/OrderedCustomListAdapter.kt
new file mode 100644
index 00000000..53b1c824
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/adapter/OrderedCustomListAdapter.kt
@@ -0,0 +1,35 @@
+package net.lacolaco.smileessence.view.adapter
+
+import net.lacolaco.smileessence.entity.IdObject
+
+import java.util.*
+
+abstract class OrderedCustomListAdapter<T : IdObject>
+constructor(comparator: Comparator<Long> = Comparator { x, y -> java.lang.Long.compare(x, y) }) : CustomListAdapter<T>() {
+    private val treeMap: MutableMap<Long, T> = TreeMap(Collections.reverseOrder(comparator))
+
+    override val list: List<T>
+        @Synchronized get() = ArrayList(treeMap.values)
+
+    @Synchronized
+    fun add(item: T) {
+        treeMap.put(item.id, item)
+    }
+
+    @Synchronized
+    fun addAll(items: Collection<T>) {
+        for (item in items) {
+            treeMap.put(item.id, item)
+        }
+    }
+
+    @Synchronized
+    fun clear() {
+        treeMap.clear()
+    }
+
+    @Synchronized
+    fun remove(item: T): T {
+        return treeMap.remove(item.id)!!
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/PageListAdapter.java b/app/src/main/java/net/lacolaco/smileessence/view/adapter/PageListAdapter.java
deleted file mode 100644
index 76e72093..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/adapter/PageListAdapter.java
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.adapter;
-
-import android.os.Bundle;
-import android.support.v13.app.FragmentPagerAdapter;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.logging.Logger;
-import net.lacolaco.smileessence.view.page.PageFragment;
-
-import java.lang.ref.WeakReference;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-
-public class PageListAdapter extends FragmentPagerAdapter {
-
-    // ------------------------------ FIELDS ------------------------------
-
-    private final List<PageInfo> pages = new ArrayList<>();
-    private final Map<Integer, WeakReference<PageFragment>> fragmentCache = new HashMap<>();
-
-    // --------------------------- FragmentPagerAdapter ---------------------------
-
-    public PageListAdapter(MainActivity _activity) {
-        super(_activity.getFragmentManager());
-    }
-
-    @Override
-    public synchronized PageFragment getItem(int position) {
-        PageFragment pf;
-        PageInfo info = pages.get(position);
-        try {
-            pf = info.getFragmentClass().newInstance();
-        } catch (Exception e) {
-            Logger.error("should not happen: fragmentClass is private or Android is broken?");
-            e.printStackTrace();
-            throw new RuntimeException(e);
-        }
-        pf.setArguments(info.getArgs());
-        fragmentCache.put(position, new WeakReference<>(pf));
-        return pf;
-    }
-
-    public synchronized PageFragment getCachedFragment(int pos) {
-        WeakReference<PageFragment> wpf = fragmentCache.get(pos);
-        if (wpf == null) {
-            return null;
-        } else {
-            return wpf.get();
-        }
-    }
-
-    @Override
-    public synchronized int getCount() {
-        return pages.size();
-    }
-
-    // ------------------------ INTERFACE METHODS ------------------------
-
-    // -------------------------- OTHER METHODS --------------------------
-
-    public void addPage(Class<? extends PageFragment> klass, String name, Bundle args) {
-        this.addPage(klass, name, args, true);
-    }
-
-    public void addPage(Class<? extends PageFragment> klass, String name, Bundle args, boolean notifyChanged) {
-        pages.add(new PageInfo(klass, name, args));
-        if (notifyChanged) notifyDataSetChanged();
-    }
-
-    public synchronized boolean removePage(int position) {
-        //if (removePageWithoutNotify(position)) {
-        //    refreshListNavigation();
-        //    return true;
-        //}
-        return pages.remove(position) != null; // TODO
-    }
-
-    public String getName(int pos) {
-        return pages.get(pos).getName();
-    }
-
-    @Deprecated
-    public int getIndex(Class<? extends PageFragment> fragmentClass) {
-        for (int i = 0; i < pages.size(); ++i) {
-            if (pages.get(i).getFragmentClass() == fragmentClass) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    private static final class PageInfo {
-        private final Class<? extends PageFragment> fragmentClass;
-        private final Bundle args;
-        private final String name;
-
-        PageInfo(Class<? extends PageFragment> _fragmentClass, String _name, Bundle _args) {
-            fragmentClass = _fragmentClass;
-            name = _name;
-            args = _args;
-        }
-
-        public Class<? extends PageFragment> getFragmentClass() {
-            return fragmentClass;
-        }
-
-        public String getName() {
-            return name;
-        }
-
-        public Bundle getArgs() {
-            return args;
-        }
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/PageListAdapter.kt b/app/src/main/java/net/lacolaco/smileessence/view/adapter/PageListAdapter.kt
new file mode 100644
index 00000000..34d158f0
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/adapter/PageListAdapter.kt
@@ -0,0 +1,110 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.adapter
+
+import android.os.Bundle
+import android.support.v13.app.FragmentPagerAdapter
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.logging.Logger
+import net.lacolaco.smileessence.view.page.PageFragment
+
+import java.lang.ref.WeakReference
+import java.util.ArrayList
+import java.util.HashMap
+
+class PageListAdapter
+// --------------------------- FragmentPagerAdapter ---------------------------
+
+(_activity: MainActivity) : FragmentPagerAdapter(_activity.fragmentManager) {
+
+    // ------------------------------ FIELDS ------------------------------
+
+    private val pages = ArrayList<PageInfo>()
+    private val fragmentCache = HashMap<Int, WeakReference<PageFragment<*>>>()
+
+    @Synchronized override fun getItem(position: Int): PageFragment<*> {
+        val pf: PageFragment<*>
+        val info = pages[position]
+        try {
+            pf = info.fragmentClass.newInstance()
+        } catch (e: Exception) {
+            Logger.error("should not happen: fragmentClass is private or Android is broken?")
+            e.printStackTrace()
+            throw RuntimeException(e)
+        }
+
+        pf.arguments = info.args
+        fragmentCache.put(position, WeakReference(pf))
+        return pf
+    }
+
+    @Synchronized
+    fun getCachedFragment(pos: Int): PageFragment<*>? {
+        val wpf = fragmentCache[pos]
+        return wpf?.get()
+    }
+
+    @Synchronized override fun getCount(): Int {
+        return pages.size
+    }
+
+    // ------------------------ INTERFACE METHODS ------------------------
+
+    // -------------------------- OTHER METHODS --------------------------
+
+    fun addPage(klass: Class<out PageFragment<*>>, name: String, args: Bundle) {
+        this.addPage(klass, name, args, true)
+    }
+
+    fun addPage(klass: Class<out PageFragment<*>>, name: String, args: Bundle, notifyChanged: Boolean) {
+        pages.add(PageInfo(klass, name, args))
+        if (notifyChanged) notifyDataSetChanged()
+    }
+
+    @Synchronized
+    fun removePage(position: Int): Boolean {
+        //if (removePageWithoutNotify(position)) {
+        //    refreshListNavigation();
+        //    return true;
+        //}
+        return pages.removeAt(position) != null // TODO
+    }
+
+    fun getName(pos: Int): String {
+        return pages[pos].name
+    }
+
+    @Deprecated("")
+    fun getIndex(fragmentClass: Class<out PageFragment<*>>): Int {
+        for (i in pages.indices) {
+            if (pages[i].fragmentClass == fragmentClass) {
+                return i
+            }
+        }
+        return -1
+    }
+
+    private class PageInfo internal constructor(val fragmentClass: Class<out PageFragment<*>>, val name: String, val args: Bundle)
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/TimelineAdapter.java b/app/src/main/java/net/lacolaco/smileessence/view/adapter/TimelineAdapter.java
deleted file mode 100644
index 0dbe8d53..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/adapter/TimelineAdapter.java
+++ /dev/null
@@ -1,39 +0,0 @@
-package net.lacolaco.smileessence.view.adapter;
-
-import android.app.Activity;
-import android.view.View;
-import android.view.ViewGroup;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.view.Partials;
-
-import java.util.*;
-
-public class TimelineAdapter extends OrderedCustomListAdapter<Tweet> {
-    private final Activity activity;
-
-    public TimelineAdapter(Activity activity) {
-        super();
-        this.activity = activity;
-    }
-
-    public long getLastID() {
-        if (getCount() > 0) {
-            return getItem(getCount() - 1).getId();
-        } else {
-            return -1;
-        }
-    }
-
-    public long getTopID() {
-        if (getCount() > 0) {
-            return getItem(0).getId();
-        } else {
-            return -1;
-        }
-    }
-
-    @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
-        return Partials.getTweetView(getItem(position), activity, convertView, true);
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/TimelineAdapter.kt b/app/src/main/java/net/lacolaco/smileessence/view/adapter/TimelineAdapter.kt
new file mode 100644
index 00000000..750b63a0
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/adapter/TimelineAdapter.kt
@@ -0,0 +1,29 @@
+package net.lacolaco.smileessence.view.adapter
+
+import android.app.Activity
+import android.view.View
+import android.view.ViewGroup
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.view.Partials
+
+import java.util.*
+
+class TimelineAdapter(private val activity: Activity) : OrderedCustomListAdapter<Tweet>() {
+    val lastID: Long
+        get() = if (count > 0) {
+            getItem(count - 1).id
+        } else {
+            -1
+        }
+
+    val topID: Long
+        get() = if (count > 0) {
+            getItem(0).id
+        } else {
+            -1
+        }
+
+    override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        return Partials.getTweetView(getItem(position), activity, convertView, true)
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/ConfirmDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/ConfirmDialogFragment.java
deleted file mode 100644
index 74dcc468..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/ConfirmDialogFragment.java
+++ /dev/null
@@ -1,119 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.Activity;
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.content.DialogInterface;
-import android.os.Bundle;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.preference.UserPreferenceHelper;
-import net.lacolaco.smileessence.view.DialogHelper;
-
-public abstract class ConfirmDialogFragment extends StackableDialogFragment {
-
-    // ------------------------------ FIELDS ------------------------------
-
-    private static final String ARG_TEXT = "text";
-    private final DialogInterface.OnClickListener listener = (dialog, which) -> {
-        onButtonClick(which);
-        dialog.dismiss();
-    };
-    private String text;
-
-    // -------------------------- STATIC METHODS --------------------------
-
-    public static void show(Activity activity, String text, final Runnable onYes) {
-        show(activity, text, onYes, null, true);
-    }
-
-    public static void show(Activity activity, String text, final Runnable onYes, boolean ignorable) {
-        show(activity, text, onYes, null, ignorable);
-    }
-
-    public static void show(Activity activity, String text, final Runnable onOK, final Runnable onCancel, boolean ignorable) {
-        boolean confirm = UserPreferenceHelper.getInstance().get(R.string.key_setting_show_confirm_dialog, true);
-        if (!confirm && ignorable) {
-            onOK.run();
-            return;
-        }
-        final ConfirmDialogFragment fragment = new ConfirmDialogFragment() {
-            @Override
-            public void onButtonClick(int which) {
-                switch (which) {
-                    case DialogInterface.BUTTON_POSITIVE: {
-                        if (onOK != null) {
-                            dismiss();
-                            onOK.run();
-                        }
-                        break;
-                    }
-                    case DialogInterface.BUTTON_NEGATIVE: {
-                        if (onCancel != null) {
-                            dismiss();
-                            onCancel.run();
-                        }
-                        break;
-                    }
-                }
-            }
-        };
-        fragment.setText(text);
-        DialogHelper.showDialog(activity, fragment);
-    }
-
-    // --------------------- GETTER / SETTER METHODS ---------------------
-
-    public void setText(String text) {
-        Bundle args = new Bundle();
-        args.putString(ARG_TEXT, text);
-        setArguments(args);
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        Bundle args = getArguments();
-        if (args != null) {
-            text = args.getString(ARG_TEXT);
-        }
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        return new AlertDialog.Builder(getActivity()).setTitle(text)
-                .setCancelable(false)
-                .setPositiveButton(R.string.alert_dialog_ok, listener)
-                .setNegativeButton(R.string.alert_dialog_cancel, listener)
-                .create();
-    }
-
-    // -------------------------- OTHER METHODS --------------------------
-
-    protected abstract void onButtonClick(int which);
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/ConfirmDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/ConfirmDialogFragment.kt
new file mode 100644
index 00000000..094aa18a
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/ConfirmDialogFragment.kt
@@ -0,0 +1,119 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.Activity
+import android.app.AlertDialog
+import android.app.Dialog
+import android.content.DialogInterface
+import android.os.Bundle
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.preference.UserPreferenceHelper
+import net.lacolaco.smileessence.view.DialogHelper
+
+abstract class ConfirmDialogFragment : StackableDialogFragment() {
+    private var text: String? = null
+
+    // --------------------- GETTER / SETTER METHODS ---------------------
+
+    fun setText(text: String) {
+        val args = Bundle()
+        args.putString(ARG_TEXT, text)
+        arguments = args
+    }
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val args = arguments
+        if (args != null) {
+            text = args.getString(ARG_TEXT)
+        }
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        return AlertDialog.Builder(activity).setTitle(text)
+                .setCancelable(false)
+                .setPositiveButton(R.string.alert_dialog_ok, { dialog, which ->
+                    onButtonClick(which)
+                    dialog.dismiss()
+                })
+                .setNegativeButton(R.string.alert_dialog_cancel, { dialog, which ->
+                    onButtonClick(which)
+                    dialog.dismiss()
+                })
+                .create()
+    }
+
+    // -------------------------- OTHER METHODS --------------------------
+
+    protected abstract fun onButtonClick(which: Int)
+
+    companion object {
+
+        // ------------------------------ FIELDS ------------------------------
+
+        private val ARG_TEXT = "text"
+
+        // -------------------------- STATIC METHODS --------------------------
+
+        fun show(activity: Activity, text: String, onYes: () -> Unit) {
+            show(activity, text, onYes, null, true)
+        }
+
+        fun show(activity: Activity, text: String, onYes: () -> Unit, ignorable: Boolean) {
+            show(activity, text, onYes, null, ignorable)
+        }
+
+        fun show(activity: Activity, text: String, onOK: (() -> Unit)?, onCancel: (() -> Unit)?, ignorable: Boolean) {
+            val confirm = UserPreferenceHelper.instance.get(R.string.key_setting_show_confirm_dialog, true)
+            if (!confirm && ignorable) {
+                onOK!!()
+                return
+            }
+            val fragment = object : ConfirmDialogFragment() {
+                public override fun onButtonClick(which: Int) {
+                    when (which) {
+                        DialogInterface.BUTTON_POSITIVE -> {
+                            if (onOK != null) {
+                                dismiss()
+                                onOK()
+                            }
+                        }
+                        DialogInterface.BUTTON_NEGATIVE -> {
+                            if (onCancel != null) {
+                                dismiss()
+                                onCancel()
+                            }
+                        }
+                    }
+                }
+            }
+            fragment.setText(text)
+            DialogHelper.showDialog(activity, fragment)
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/DisposeDialog.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/DisposeDialog.kt
index eb3d3613..3cd486bd 100644
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/DisposeDialog.java
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/DisposeDialog.kt
@@ -22,22 +22,16 @@
  * SOFTWARE.
  */
 
-package net.lacolaco.smileessence.view.dialog;
+package net.lacolaco.smileessence.view.dialog
 
-import android.app.Dialog;
-import android.content.Context;
+import android.app.Dialog
+import android.content.Context
 
 /**
  * Dialog for dispose soon.
  */
-public final class DisposeDialog extends Dialog {
-
-    public DisposeDialog(Context context) {
-        super(context);
-    }
-
-    @Override
-    public void show() {
-        dismiss();
+class DisposeDialog(context: Context) : Dialog(context) {
+    override fun show() {
+        dismiss()
     }
 }
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/EditTextDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/EditTextDialogFragment.java
deleted file mode 100644
index 8ce25145..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/EditTextDialogFragment.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.app.DialogFragment;
-import android.os.Bundle;
-import android.view.View;
-import android.widget.EditText;
-import net.lacolaco.smileessence.R;
-
-public abstract class EditTextDialogFragment extends DialogFragment {
-
-    // ------------------------------ FIELDS ------------------------------
-
-    private static final String titleKey = "title";
-    private static final String textKey = "text";
-    private String title;
-    private String text;
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        Bundle args = getArguments();
-        text = args.getString(textKey);
-        title = args.getString(titleKey);
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        View view = getActivity().getLayoutInflater().inflate(R.layout.part_edittext, null);
-        final EditText editText = (EditText) view.findViewById(R.id.part_edittext);
-        editText.setText(text);
-        return new AlertDialog.Builder(getActivity())
-                .setTitle(title)
-                .setView(view)
-                .setPositiveButton(R.string.alert_dialog_ok, (dialog, which) -> {
-                    onTextInput(editText.getText().toString());
-                    dialog.dismiss();
-                })
-                .setNegativeButton(R.string.alert_dialog_cancel, (dialog, which) -> dialog.dismiss())
-                .create();
-    }
-
-    // -------------------------- OTHER METHODS --------------------------
-
-    public abstract void onTextInput(String text);
-
-    public void setParams(String title, String text) {
-        Bundle args = new Bundle();
-        args.putString(titleKey, title);
-        args.putString(textKey, text);
-        setArguments(args);
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/EditTextDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/EditTextDialogFragment.kt
new file mode 100644
index 00000000..399b84ad
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/EditTextDialogFragment.kt
@@ -0,0 +1,81 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.app.DialogFragment
+import android.os.Bundle
+import android.view.View
+import android.widget.EditText
+import net.lacolaco.smileessence.R
+
+abstract class EditTextDialogFragment : DialogFragment() {
+    private lateinit var title: String
+    private lateinit var text: String
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        val args = arguments
+        text = args.getString(textKey)
+        title = args.getString(titleKey)
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val view = activity.layoutInflater.inflate(R.layout.part_edittext, null)
+        val editText = view.findViewById(R.id.part_edittext) as EditText
+        editText.setText(text)
+        return AlertDialog.Builder(activity)
+                .setTitle(title)
+                .setView(view)
+                .setPositiveButton(R.string.alert_dialog_ok) { dialog, which ->
+                    onTextInput(editText.text.toString())
+                    dialog.dismiss()
+                }
+                .setNegativeButton(R.string.alert_dialog_cancel) { dialog, which -> dialog.dismiss() }
+                .create()
+    }
+
+    // -------------------------- OTHER METHODS --------------------------
+
+    abstract fun onTextInput(text: String)
+
+    fun setParams(title: String, text: String) {
+        val args = Bundle()
+        args.putString(titleKey, title)
+        args.putString(textKey, text)
+        arguments = args
+    }
+
+    companion object {
+
+        // ------------------------------ FIELDS ------------------------------
+
+        private val titleKey = "title"
+        private val textKey = "text"
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/MessageDetailDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/MessageDetailDialogFragment.java
deleted file mode 100644
index f8a1e2e5..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/MessageDetailDialogFragment.java
+++ /dev/null
@@ -1,250 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2015 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.graphics.drawable.ColorDrawable;
-import android.os.Bundle;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageButton;
-import android.widget.ListView;
-import android.widget.TextView;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.command.Command;
-import net.lacolaco.smileessence.command.CommandAddHashtag;
-import net.lacolaco.smileessence.command.CommandOpenURL;
-import net.lacolaco.smileessence.command.CommandOpenUserDetail;
-import net.lacolaco.smileessence.entity.DirectMessage;
-import net.lacolaco.smileessence.preference.UserPreferenceHelper;
-import net.lacolaco.smileessence.twitter.task.Messages;
-import net.lacolaco.smileessence.util.SystemServiceHelper;
-import net.lacolaco.smileessence.view.DialogHelper;
-import net.lacolaco.smileessence.view.Partials;
-import net.lacolaco.smileessence.view.adapter.CustomListAdapter;
-import net.lacolaco.smileessence.view.adapter.MessageListAdapter;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class MessageDetailDialogFragment extends StackableDialogFragment implements View.OnClickListener {
-    private static final String KEY_MESSAGE_ID = "message_id";
-    private DirectMessage message;
-
-    public static MessageDetailDialogFragment newInstance(DirectMessage message) {
-        MessageDetailDialogFragment obj = new MessageDetailDialogFragment();
-        Bundle args = new Bundle();
-        args.putLong(KEY_MESSAGE_ID, message.getId());
-        obj.setArguments(args);
-        return obj;
-    }
-
-    @Override
-    public void onClick(final View v) {
-        switch (v.getId()) {
-            case R.id.button_status_detail_reply: {
-                openSendMessageDialog();
-                break;
-            }
-            case R.id.button_status_detail_delete: {
-                deleteMessage();
-                break;
-            }
-            case R.id.button_status_detail_menu: {
-                openMenu();
-                break;
-            }
-            default: {
-                dismiss();
-            }
-        }
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        message = DirectMessage.fetch(getArguments().getLong(KEY_MESSAGE_ID));
-        if (message == null) {
-            getWorld().notifyError(R.string.notice_error_get_messages);
-            return new DisposeDialog(getActivity());
-        }
-
-        View header = getTitleView();
-        ListView listView = (ListView) header.findViewById(R.id.listview_status_detail_reply_to);
-        final MessageListAdapter adapter = new MessageListAdapter(getActivity());
-        listView.setAdapter(adapter);
-
-        // TODO: 効率的な探索どうする
-        DirectMessage replyTo = null;
-        // FIXME
-        // for (DirectMessage mes : DirectMessage.cached()) {
-        //     if (message.getId() > mes.getId() &&
-        //             message.getRecipient() == mes.getSender() &&
-        //             message.getSender() == mes.getRecipient() &&
-        //             (replyTo == null || replyTo.getId() < mes.getId())) {
-        //         replyTo = mes;
-        //     }
-        // }
-        if (replyTo != null) {
-            listView.setVisibility(View.VISIBLE);
-            adapter.add(replyTo);
-            adapter.updateForce();
-        } else {
-            listView.setVisibility(View.GONE);
-        }
-
-        return new AlertDialog.Builder(getActivity()).setView(header).create();
-    }
-
-    // -------------------------- OTHER METHODS --------------------------
-
-    private void deleteMessage() {
-        ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_commands), () -> {
-            new Messages.DestroyTask(getWorld().getAccount(), message.getId())
-                    .onDone(x -> getWorld().notify(R.string.notice_message_delete_succeeded))
-                    .onFail(x -> getWorld().notifyError(R.string.notice_message_delete_failed))
-                    .execute();
-            dismiss();
-        });
-    }
-
-    private void openSendMessageDialog() {
-        DialogHelper.showDialog(getActivity(), SendMessageDialogFragment.newInstance(message.getSender()));
-    }
-
-    private View getTitleView() {
-        MainActivity activity = (MainActivity) getActivity();
-
-        View view = activity.getLayoutInflater().inflate(R.layout.dialog_status_detail, null);
-
-        View messageHeader = Partials.getDirectMessageView(message, activity, view.findViewById(R.id.layout_status_header));
-        messageHeader.setClickable(false);
-
-        view.setBackgroundColor(((ColorDrawable) messageHeader.getBackground()).getColor());
-        updateViewButtons(view);
-        updateViewMenu(view);
-
-        // status only parts
-        view.findViewById(R.id.detail_dialog_divider_top).setVisibility(View.GONE);
-        view.findViewById(R.id.button_status_detail_retweet).setVisibility(View.GONE);
-        view.findViewById(R.id.button_status_detail_favorite).setVisibility(View.GONE);
-        view.findViewById(R.id.image_status_detail_fav_count).setVisibility(View.GONE);
-        view.findViewById(R.id.image_status_detail_rt_count).setVisibility(View.GONE);
-
-        return view;
-    }
-
-    private void updateViewButtons(View view) {
-        //--- buttons
-        ImageButton reply = (ImageButton) view.findViewById(R.id.button_status_detail_reply);
-        reply.setOnClickListener(this);
-
-        ImageButton delete = (ImageButton) view.findViewById(R.id.button_status_detail_delete);
-        delete.setOnClickListener(this);
-        delete.setVisibility(View.VISIBLE);
-    }
-
-    private void updateViewMenu(View view) {
-        // -- menu dialog
-        ImageButton menu = (ImageButton) view.findViewById(R.id.button_status_detail_menu);
-        menu.setOnClickListener(this);
-
-        // -- menu embedded in dialog
-        View divider = view.findViewById(R.id.detail_dialog_divider_bottom);
-        ListView listView = (ListView) view.findViewById(R.id.listview_status_detail_menu);
-        List<Command> commands = getCommands();
-        if (commands.size() > 0) {
-            divider.setVisibility(View.VISIBLE);
-            listView.setVisibility(View.VISIBLE);
-            final CustomListAdapter<Command> adapter = new CustomListAdapter<Command>() {
-                @Override
-                public View getView(int position, View convertView, ViewGroup parent) {
-                    if (convertView == null) {
-                        convertView = getActivity().getLayoutInflater().inflate(R.layout.menu_item_simple_text, null);
-                    }
-                    TextView textView = (TextView) convertView.findViewById(R.id.list_item_textview);
-                    textView.setTextSize(UserPreferenceHelper.getInstance().getTextSize());
-                    textView.setText(getItem(position).getText());
-                    return convertView;
-                }
-
-                @Override
-                protected List<Command> getList() {
-                    return commands;
-                }
-            };
-            adapter.update();
-            listView.setAdapter(adapter);
-            listView.setOnItemClickListener((parent, view1, position, id) -> {
-                Command command = (Command) parent.getItemAtPosition(position);
-                command.execute();
-            });
-        } else {
-            divider.setVisibility(View.GONE);
-            listView.setVisibility(View.GONE);
-        }
-    }
-
-    private List<Command> getCommands() {
-        MainActivity activity = (MainActivity) getActivity();
-        List<Command> commands = new ArrayList<>();
-        // Mentions
-        if (message.getSender() != message.getRecipient()) {
-            commands.add(new CommandOpenUserDetail(activity, message.getRecipient().getScreenName()));
-        }
-        for (String screenName : message.getMentions()) {
-            commands.add(new CommandOpenUserDetail(activity, screenName));
-        }
-        for (String hashtag : message.getHashtags()) {
-            commands.add(new CommandAddHashtag(activity, hashtag));
-        }
-        // URL
-        for (String url : message.getUrlsExpanded()) {
-            commands.add(new CommandOpenURL(activity, url));
-        }
-        for (String url : message.getMediaUrls()) {
-            commands.add(new CommandOpenURL(activity, url));
-        }
-        return commands;
-    }
-
-    private void openMenu() {
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-        builder.setTitle("@" + message.getSender().getScreenName() + ": " + message.getText())
-                .setItems(R.array.message_commands, (dialog, which) -> {
-                    switch (which) {
-                        case 0:
-                            SystemServiceHelper.copyToClipboard(getActivity(), "message text", message.getText());
-                            getWorld().notify(R.string.notice_copy_clipboard);
-                            break;
-                        default:
-                            throw new IllegalStateException();
-                    }
-                });
-        AlertDialog dialog = builder.create();
-        dialog.show();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/MessageDetailDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/MessageDetailDialogFragment.kt
new file mode 100644
index 00000000..36f7584f
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/MessageDetailDialogFragment.kt
@@ -0,0 +1,246 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2015 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.graphics.drawable.ColorDrawable
+import android.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageButton
+import android.widget.ListView
+import android.widget.TextView
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.command.Command
+import net.lacolaco.smileessence.command.CommandAddHashtag
+import net.lacolaco.smileessence.command.CommandOpenURL
+import net.lacolaco.smileessence.command.CommandOpenUserDetail
+import net.lacolaco.smileessence.entity.DirectMessage
+import net.lacolaco.smileessence.preference.UserPreferenceHelper
+import net.lacolaco.smileessence.twitter.task.Messages
+import net.lacolaco.smileessence.util.SystemServiceHelper
+import net.lacolaco.smileessence.view.DialogHelper
+import net.lacolaco.smileessence.view.Partials
+import net.lacolaco.smileessence.view.adapter.CustomListAdapter
+import net.lacolaco.smileessence.view.adapter.MessageListAdapter
+
+import java.util.ArrayList
+
+class MessageDetailDialogFragment : StackableDialogFragment(), View.OnClickListener {
+    private lateinit var message: DirectMessage
+
+    override fun onClick(v: View) {
+        when (v.id) {
+            R.id.button_status_detail_reply -> {
+                openSendMessageDialog()
+            }
+            R.id.button_status_detail_delete -> {
+                deleteMessage()
+            }
+            R.id.button_status_detail_menu -> {
+                openMenu()
+            }
+            else -> {
+                dismiss()
+            }
+        }
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val found = DirectMessage.fetch(arguments.getLong(KEY_MESSAGE_ID))
+        if (found == null) {
+            world.notifyError(R.string.notice_error_get_messages)
+            return DisposeDialog(activity)
+        }
+        message = found
+
+        val header = titleView
+        val listView = header.findViewById(R.id.listview_status_detail_reply_to) as ListView
+        val adapter = MessageListAdapter(activity)
+        listView.adapter = adapter
+
+        // TODO: 効率的な探索どうする
+        val replyTo: DirectMessage? = null
+        // FIXME
+        // for (DirectMessage mes : DirectMessage.cached()) {
+        //     if (message.getId() > mes.getId() &&
+        //             message.getRecipient() == mes.getSender() &&
+        //             message.getSender() == mes.getRecipient() &&
+        //             (replyTo == null || replyTo.getId() < mes.getId())) {
+        //         replyTo = mes;
+        //     }
+        // }
+        if (replyTo != null) {
+            listView.visibility = View.VISIBLE
+            adapter.add(replyTo)
+            adapter.updateForce()
+        } else {
+            listView.visibility = View.GONE
+        }
+
+        return AlertDialog.Builder(activity).setView(header).create()
+    }
+
+    // -------------------------- OTHER METHODS --------------------------
+
+    private fun deleteMessage() {
+        ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_commands)) {
+            Messages.DestroyTask(world.account, message.id)
+                    .onDone { x -> world.notify(R.string.notice_message_delete_succeeded) }
+                    .onFail { x -> world.notifyError(R.string.notice_message_delete_failed) }
+                    .execute()
+            dismiss()
+        }
+    }
+
+    private fun openSendMessageDialog() {
+        DialogHelper.showDialog(activity, SendMessageDialogFragment.newInstance(message.sender))
+    }
+
+    private // status only parts
+    val titleView: View
+        get() {
+            val activity = activity as MainActivity
+
+            val view = activity.layoutInflater.inflate(R.layout.dialog_status_detail, null)
+
+            val messageHeader = Partials.getDirectMessageView(message, activity, view.findViewById(R.id.layout_status_header))
+            messageHeader.isClickable = false
+
+            view.setBackgroundColor((messageHeader.background as ColorDrawable).color)
+            updateViewButtons(view)
+            updateViewMenu(view)
+            view.findViewById(R.id.detail_dialog_divider_top).visibility = View.GONE
+            view.findViewById(R.id.button_status_detail_retweet).visibility = View.GONE
+            view.findViewById(R.id.button_status_detail_favorite).visibility = View.GONE
+            view.findViewById(R.id.image_status_detail_fav_count).visibility = View.GONE
+            view.findViewById(R.id.image_status_detail_rt_count).visibility = View.GONE
+
+            return view
+        }
+
+    private fun updateViewButtons(view: View) {
+        //--- buttons
+        val reply = view.findViewById(R.id.button_status_detail_reply) as ImageButton
+        reply.setOnClickListener(this)
+
+        val delete = view.findViewById(R.id.button_status_detail_delete) as ImageButton
+        delete.setOnClickListener(this)
+        delete.visibility = View.VISIBLE
+    }
+
+    private fun updateViewMenu(view: View) {
+        // -- menu dialog
+        val menu = view.findViewById(R.id.button_status_detail_menu) as ImageButton
+        menu.setOnClickListener(this)
+
+        // -- menu embedded in dialog
+        val divider = view.findViewById(R.id.detail_dialog_divider_bottom)
+        val listView = view.findViewById(R.id.listview_status_detail_menu) as ListView
+        val commands = commands
+        if (commands.size > 0) {
+            divider.visibility = View.VISIBLE
+            listView.visibility = View.VISIBLE
+            val adapter = object : CustomListAdapter<Command>() {
+                override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+                    var convertView = convertView
+                    if (convertView == null) {
+                        convertView = activity.layoutInflater.inflate(R.layout.menu_item_simple_text, null)
+                    }
+                    val textView = convertView!!.findViewById(R.id.list_item_textview) as TextView
+                    textView.textSize = UserPreferenceHelper.instance.textSize.toFloat()
+                    textView.text = getItem(position).text
+                    return convertView
+                }
+
+                override val list: List<Command>
+                    get() = commands
+            }
+            adapter.update()
+            listView.adapter = adapter
+            listView.setOnItemClickListener { parent, view1, position, id ->
+                val command = parent.getItemAtPosition(position) as Command
+                command.execute()
+            }
+        } else {
+            divider.visibility = View.GONE
+            listView.visibility = View.GONE
+        }
+    }
+
+    private // Mentions
+            // URL
+    val commands: List<Command>
+        get() {
+            val activity = activity as MainActivity
+            val commands = ArrayList<Command>()
+            if (message.sender !== message.recipient) {
+                commands.add(CommandOpenUserDetail(activity, message.recipient.screenName))
+            }
+            for (screenName in message.mentions) {
+                commands.add(CommandOpenUserDetail(activity, screenName))
+            }
+            for (hashtag in message.hashtags) {
+                commands.add(CommandAddHashtag(activity, hashtag))
+            }
+            for (url in message.urlsExpanded) {
+                commands.add(CommandOpenURL(activity, url))
+            }
+            for (url in message.mediaUrls) {
+                commands.add(CommandOpenURL(activity, url))
+            }
+            return commands
+        }
+
+    private fun openMenu() {
+        val builder = AlertDialog.Builder(activity)
+        builder.setTitle("@" + message.sender.screenName + ": " + message.text)
+                .setItems(R.array.message_commands) { dialog, which ->
+                    when (which) {
+                        0 -> {
+                            SystemServiceHelper.copyToClipboard(activity, "message text", message.text)
+                            world.notify(R.string.notice_copy_clipboard)
+                        }
+                        else -> throw IllegalStateException()
+                    }
+                }
+        val dialog = builder.create()
+        dialog.show()
+    }
+
+    companion object {
+        private val KEY_MESSAGE_ID = "message_id"
+
+        fun newInstance(message: DirectMessage): MessageDetailDialogFragment {
+            val obj = MessageDetailDialogFragment()
+            val args = Bundle()
+            args.putLong(KEY_MESSAGE_ID, message.id)
+            obj.arguments = args
+            return obj
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/SendMessageDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/SendMessageDialogFragment.java
deleted file mode 100644
index 20917d8f..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/SendMessageDialogFragment.java
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.os.Bundle;
-import android.support.v4.content.ContextCompat;
-import android.text.Editable;
-import android.text.TextUtils;
-import android.text.TextWatcher;
-import android.view.View;
-import android.widget.Button;
-import android.widget.EditText;
-import android.widget.ImageButton;
-import android.widget.TextView;
-import com.twitter.Validator;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.entity.User;
-import net.lacolaco.smileessence.twitter.task.Messages;
-import net.lacolaco.smileessence.util.SystemServiceHelper;
-
-public class SendMessageDialogFragment extends StackableDialogFragment implements TextWatcher, View.OnClickListener {
-    private static final String KEY_RECIPIENT_ID = "KEY_RECIPIENT_ID";
-    private User recipient;
-    private EditText editText;
-    private TextView textViewCount;
-    private Button buttonSend;
-
-    public static SendMessageDialogFragment newInstance(User recipient) {
-        SendMessageDialogFragment obj = new SendMessageDialogFragment();
-        Bundle args = new Bundle();
-        args.putLong(KEY_RECIPIENT_ID, recipient.getId());
-        obj.setArguments(args);
-        return obj;
-    }
-    @Override
-    public void onClick(View v) {
-        int id = v.getId();
-        switch (id) {
-            case R.id.button_send_message: {
-                sendMessage();
-                break;
-            }
-            case R.id.button_send_message_delete: {
-                deleteMessage();
-            }
-        }
-    }
-
-    @Override
-    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-
-    }
-
-    @Override
-    public void onTextChanged(CharSequence s, int start, int before, int count) {
-        Validator validator = new Validator();
-        int remainingCount = 140 - validator.getTweetLength(s.toString());
-        textViewCount.setText(String.valueOf(remainingCount));
-        if (remainingCount == 140 || remainingCount < 0) {
-            textViewCount.setTextColor(ContextCompat.getColor(getActivity(), R.color.red));
-        } else {
-            textViewCount.setTextAppearance(getActivity(), android.R.style.TextAppearance_Widget_TextView);
-        }
-    }
-
-    @Override
-    public void afterTextChanged(Editable s) {
-
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        recipient = User.fetch(getArguments().getLong(KEY_RECIPIENT_ID));
-        View view = getActivity().getLayoutInflater().inflate(R.layout.dialog_send_message, null);
-        TextView textViewName = (TextView) view.findViewById(R.id.textview_send_message_name);
-        textViewName.setText("To: @" + recipient.getScreenName());
-        textViewCount = (TextView) view.findViewById(R.id.textview_send_message_count);
-        editText = (EditText) view.findViewById(R.id.edittext_send_message);
-        editText.addTextChangedListener(this);
-        buttonSend = (Button) view.findViewById(R.id.button_send_message);
-        buttonSend.setOnClickListener(this);
-        ImageButton buttonDelete = (ImageButton) view.findViewById(R.id.button_send_message_delete);
-        buttonDelete.setOnClickListener(this);
-        editText.setText("");
-        return new AlertDialog.Builder(getActivity())
-                .setView(view)
-                .create();
-    }
-
-    private void deleteMessage() {
-        editText.setText("");
-    }
-
-    private void sendMessage() {
-        SystemServiceHelper.hideIM(getActivity(), editText);
-        String text = editText.getText().toString();
-        new Messages.CreateTask(getWorld().getAccount(), recipient.getId(), text)
-                .onDoneUI(m -> {
-                    getWorld().addDirectMessage(m);
-                    getWorld().notify(R.string.notice_message_send_succeeded);
-                    dismiss();
-                })
-                .onFail(e -> getWorld().notifyError(R.string.notice_message_send_failed, e))
-                .execute();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/SendMessageDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/SendMessageDialogFragment.kt
new file mode 100644
index 00000000..fb7e9d2f
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/SendMessageDialogFragment.kt
@@ -0,0 +1,127 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.os.Bundle
+import android.support.v4.content.ContextCompat
+import android.text.Editable
+import android.text.TextUtils
+import android.text.TextWatcher
+import android.view.View
+import android.widget.Button
+import android.widget.EditText
+import android.widget.ImageButton
+import android.widget.TextView
+import com.twitter.Validator
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.entity.User
+import net.lacolaco.smileessence.twitter.task.Messages
+import net.lacolaco.smileessence.util.SystemServiceHelper
+
+class SendMessageDialogFragment : StackableDialogFragment(), TextWatcher, View.OnClickListener {
+    private var recipient: User? = null
+    private var editText: EditText? = null
+    private var textViewCount: TextView? = null
+    private var buttonSend: Button? = null
+    override fun onClick(v: View) {
+        val id = v.id
+        when (id) {
+            R.id.button_send_message -> {
+                sendMessage()
+            }
+            R.id.button_send_message_delete -> {
+                deleteMessage()
+            }
+        }
+    }
+
+    override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
+
+    }
+
+    override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
+        val validator = Validator()
+        val remainingCount = 140 - validator.getTweetLength(s.toString())
+        textViewCount!!.text = remainingCount.toString()
+        if (remainingCount == 140 || remainingCount < 0) {
+            textViewCount!!.setTextColor(ContextCompat.getColor(activity, R.color.red))
+        } else {
+            textViewCount!!.setTextAppearance(activity, android.R.style.TextAppearance_Widget_TextView)
+        }
+    }
+
+    override fun afterTextChanged(s: Editable) {
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        recipient = User.fetch(arguments.getLong(KEY_RECIPIENT_ID))
+        val view = activity.layoutInflater.inflate(R.layout.dialog_send_message, null)
+        val textViewName = view.findViewById(R.id.textview_send_message_name) as TextView
+        textViewName.text = "To: @" + recipient!!.screenName
+        textViewCount = view.findViewById(R.id.textview_send_message_count) as TextView
+        editText = view.findViewById(R.id.edittext_send_message) as EditText
+        editText!!.addTextChangedListener(this)
+        buttonSend = view.findViewById(R.id.button_send_message) as Button
+        buttonSend!!.setOnClickListener(this)
+        val buttonDelete = view.findViewById(R.id.button_send_message_delete) as ImageButton
+        buttonDelete.setOnClickListener(this)
+        editText!!.setText("")
+        return AlertDialog.Builder(activity)
+                .setView(view)
+                .create()
+    }
+
+    private fun deleteMessage() {
+        editText!!.setText("")
+    }
+
+    private fun sendMessage() {
+        SystemServiceHelper.hideIM(activity, editText)
+        val text = editText!!.text.toString()
+        Messages.CreateTask(world.account, recipient!!.id, text)
+                .onDoneUI { m ->
+                    world.addDirectMessage(m)
+                    world.notify(R.string.notice_message_send_succeeded)
+                    dismiss()
+                }
+                .onFail { e -> world.notifyError(R.string.notice_message_send_failed, e) }
+                .execute()
+    }
+
+    companion object {
+        private val KEY_RECIPIENT_ID = "KEY_RECIPIENT_ID"
+
+        fun newInstance(recipient: User): SendMessageDialogFragment {
+            val obj = SendMessageDialogFragment()
+            val args = Bundle()
+            args.putLong(KEY_RECIPIENT_ID, recipient.id)
+            obj.arguments = args
+            return obj
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/StackableDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/StackableDialogFragment.java
deleted file mode 100644
index 848c6465..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/StackableDialogFragment.java
+++ /dev/null
@@ -1,28 +0,0 @@
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.DialogFragment;
-import net.lacolaco.smileessence.World;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.view.DialogHelper;
-
-/**
- * Only used by MainActivity.
- */
-public class StackableDialogFragment extends DialogFragment {
-    @Override
-    public void dismiss() {
-        super.dismiss();
-        DialogHelper.unregisterDialog(getTag());
-    }
-
-    @Override
-    public void dismissAllowingStateLoss() {
-        super.dismissAllowingStateLoss();
-        DialogHelper.unregisterDialog(getTag());
-    }
-
-    protected World getWorld() {
-        final MainActivity activity = (MainActivity) getActivity();
-        return activity.getWorld();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/StackableDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/StackableDialogFragment.kt
new file mode 100644
index 00000000..7822cfe3
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/StackableDialogFragment.kt
@@ -0,0 +1,25 @@
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.DialogFragment
+import net.lacolaco.smileessence.World
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.view.DialogHelper
+
+/**
+ * Only used by MainActivity.
+ */
+open class StackableDialogFragment : DialogFragment() {
+    override fun dismiss() {
+        super.dismiss()
+        DialogHelper.unregisterDialog(tag)
+    }
+
+    override fun dismissAllowingStateLoss() {
+        super.dismissAllowingStateLoss()
+        DialogHelper.unregisterDialog(tag)
+    }
+
+    protected val world: World by lazy {
+        (activity as MainActivity).world
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/StatusDetailDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/StatusDetailDialogFragment.java
deleted file mode 100644
index 5b2ee58c..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/StatusDetailDialogFragment.java
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.graphics.drawable.ColorDrawable;
-import android.os.Bundle;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageButton;
-import android.widget.ImageView;
-import android.widget.ListView;
-import android.widget.TextView;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.command.Command;
-import net.lacolaco.smileessence.command.CommandAddHashtag;
-import net.lacolaco.smileessence.command.CommandOpenURL;
-import net.lacolaco.smileessence.command.CommandOpenUserDetail;
-import net.lacolaco.smileessence.data.Account;
-import net.lacolaco.smileessence.entity.RBinding;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.preference.UserPreferenceHelper;
-import net.lacolaco.smileessence.twitter.task.TweetReactions;
-import net.lacolaco.smileessence.twitter.task.Tweets;
-import net.lacolaco.smileessence.util.IntentUtils;
-import net.lacolaco.smileessence.util.SystemServiceHelper;
-import net.lacolaco.smileessence.util.UIObserverBundle;
-import net.lacolaco.smileessence.view.DialogHelper;
-import net.lacolaco.smileessence.view.Partials;
-import net.lacolaco.smileessence.view.ToggleableImageButton;
-import net.lacolaco.smileessence.view.adapter.CustomListAdapter;
-import net.lacolaco.smileessence.view.adapter.TimelineAdapter;
-
-import java.lang.ref.WeakReference;
-import java.util.ArrayList;
-import java.util.LinkedHashSet;
-import java.util.List;
-
-public class StatusDetailDialogFragment extends StackableDialogFragment implements View.OnClickListener {
-    private static final String KEY_STATUS_ID = "status_id";
-    private Tweet tweet;
-
-    public static StatusDetailDialogFragment newInstance(Tweet tweet) {
-        StatusDetailDialogFragment obj = new StatusDetailDialogFragment();
-        Bundle args = new Bundle();
-        args.putLong(KEY_STATUS_ID, tweet.getId());
-        obj.setArguments(args);
-        return obj;
-    }
-
-    @Override
-    public void onClick(final View v) {
-        switch (v.getId()) {
-            case R.id.button_status_detail_reply: {
-                Tweet originalTweet = tweet.getOriginalTweet();
-
-                StringBuilder builder = new StringBuilder();
-                builder.append("@" + originalTweet.getUser().getScreenName() + " ");
-
-                for (String screenName : originalTweet.getMentions()) {
-                    if (!screenName.equals(getWorld().getAccount().getUser().getScreenName()))
-                        builder.append("@" + screenName + " ");
-                }
-                String text = builder.toString();
-                int selStart = originalTweet.getUser().getScreenName().length() + 2; // "@" and " "
-
-                getWorld().getPostState().beginTransaction()
-                        .clear()
-                        .insertText(0, text)
-                        .setInReplyTo(originalTweet)
-                        .setSelection(selStart, text.length())
-                        .commitWithOpen((MainActivity) getActivity());
-                break;
-            }
-            case R.id.button_status_detail_retweet: {
-                Account account = getWorld().getAccount();
-                confirm(() -> {
-                    if (tweet.isRetweetedBy(account.getUserId())) {
-                        new Tweets.DestroyTask(account, tweet.getRetweetIdBy(account.getUserId()))
-                                .onDone(t -> getWorld().notify(R.string.notice_status_delete_succeeded))
-                                .onFail(e -> getWorld().notifyError(R.string.notice_status_delete_failed))
-                                .execute();
-                        dismiss();
-                    } else {
-                        new TweetReactions.RetweetTask(account, tweet.getId())
-                                .onDone(x -> getWorld().notify(R.string.notice_retweet_succeeded))
-                                .onFail(x -> getWorld().notifyError(R.string.notice_retweet_failed))
-                                .execute();
-                    }
-                });
-                break;
-            }
-            case R.id.button_status_detail_favorite: {
-                Account account = getWorld().getAccount();
-                if (tweet.isFavoritedBy(account.getUserId())) {
-                    new TweetReactions.UnfavoriteTask(account, tweet.getId())
-                            .onDone(x -> getWorld().notify(R.string.notice_unfavorite_succeeded))
-                            .onFail(x -> getWorld().notifyError(R.string.notice_unfavorite_failed))
-                            .execute();
-                } else {
-                    new TweetReactions.FavoriteTask(account, tweet.getId())
-                            .onDone(x -> getWorld().notify(R.string.notice_favorite_succeeded))
-                            .onFail(x -> getWorld().notifyError(R.string.notice_favorite_failed))
-                            .execute();
-                }
-                break;
-            }
-            case R.id.button_status_detail_delete: {
-                confirm(() -> {
-                    new Tweets.DestroyTask(getWorld().getAccount(), tweet.getOriginalTweet().getId())
-                            .onDone(t -> getWorld().notify(R.string.notice_status_delete_succeeded))
-                            .onFail(e -> getWorld().notifyError(R.string.notice_status_delete_failed))
-                            .execute();
-                    dismiss();
-                });
-                break;
-            }
-            case R.id.button_status_detail_menu: {
-                AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-                builder.setTitle("@" + tweet.getUser().getScreenName() + ": " + tweet.getText())
-                        .setItems(R.array.status_commands, (dialog, which) -> {
-                            switch (which) {
-                                case 0:
-                                    String text = String.format("@%s ", tweet.getOriginalTweet().getUser().getScreenName());
-                                    getWorld().getPostState().beginTransaction().insertText(0, text).moveCursor(text.length()).commit();
-                                    getWorld().notify(R.string.notice_add_to_reply);
-                                    break;
-                                case 1:
-                                    TalkChainDialogFragment dialogFragment = new TalkChainDialogFragment();
-                                    dialogFragment.setStatusID(tweet.getOriginalTweet().getId());
-                                    DialogHelper.showDialog(getActivity(), dialogFragment);
-                                    break;
-                                case 2:
-                                    IntentUtils.openUri(getActivity(), tweet.getOriginalTweet().getTwitterUrl());
-                                    break;
-                                case 3:
-                                    SystemServiceHelper.copyToClipboard(getActivity(), "tweet text", tweet.getOriginalTweet().getText());
-                                    getWorld().notify(R.string.notice_copy_clipboard);
-                                    break;
-                                case 4:
-                                    String statusURL = tweet.getOriginalTweet().getTwitterUrl();
-                                    SystemServiceHelper.copyToClipboard(getActivity(), "tweet url", statusURL);
-                                    getWorld().notify(R.string.notice_copy_clipboard);
-                                    break;
-                                default:
-                                    throw new IllegalStateException();
-                            }
-                        });
-                AlertDialog dialog = builder.create();
-                dialog.show();
-                break;
-            }
-            default: {
-                dismiss();
-            }
-        }
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        tweet = Tweet.fetch(getArguments().getLong(KEY_STATUS_ID));
-        if (tweet == null) { // trying to open deleted tweet?
-            getWorld().notifyError(R.string.notice_error_show_status);
-            return new DisposeDialog(getActivity());
-        }
-
-        View view = getActivity().getLayoutInflater().inflate(R.layout.dialog_status_detail, null);
-        UIObserverBundle bundle = new UIObserverBundle();
-        view.setTag(bundle);
-
-        View statusHeader = Partials.getTweetView(tweet, getActivity(), view.findViewById(R.id.layout_status_header), true);
-        statusHeader.setClickable(false);
-
-        view.setBackgroundColor(((ColorDrawable) statusHeader.getBackground()).getColor());
-        updateViewReactions(view);
-        updateViewButtons(view);
-        setupViewMenu(view);
-
-        final WeakReference<View> weakView = new WeakReference<>(view);
-        bundle.attach(tweet.getOriginalTweet(), changes -> {
-            View strongView = weakView.get();
-            if (strongView != null && getActivity() != null) {
-                if (changes.contains(RBinding.REACTION_COUNT))
-                    updateViewReactions(strongView);
-                if (changes.contains(RBinding.FAVORITERS) || changes.contains(RBinding.RETWEETERS))
-                    updateViewButtons(strongView);
-            }
-        });
-
-        ListView listView = (ListView) view.findViewById(R.id.listview_status_detail_reply_to);
-        final TimelineAdapter adapter = new TimelineAdapter(getActivity());
-        listView.setAdapter(adapter);
-
-        View replyDivider = view.findViewById(R.id.detail_dialog_divider_top);
-
-        if (tweet.getInReplyToStatusId() != -1) {
-            replyDivider.setVisibility(View.VISIBLE);
-            listView.setVisibility(View.VISIBLE);
-            Tweet.fetchTask(tweet.getInReplyToStatusId(), getWorld().getAccount())
-                    .onDoneUI(replyTo -> {
-                        adapter.add(replyTo);
-                        adapter.update();
-                    })
-                    .execute();
-        } else {
-            replyDivider.setVisibility(View.GONE);
-            listView.setVisibility(View.GONE);
-        }
-
-        return new AlertDialog.Builder(getActivity()).setView(view).create();
-    }
-
-    private void updateViewReactions(View view) {
-        ImageView favCountIcon = (ImageView) view.findViewById(R.id.image_status_detail_fav_count);
-        TextView favCountText = (TextView) view.findViewById(R.id.textview_status_detail_fav_count);
-        if (tweet.getFavoriteCount() > 0) {
-            favCountText.setText(Integer.toString(tweet.getFavoriteCount()));
-            favCountIcon.setVisibility(View.VISIBLE);
-            favCountText.setVisibility(View.VISIBLE);
-        } else {
-            favCountIcon.setVisibility(View.GONE);
-            favCountText.setVisibility(View.GONE);
-        }
-
-        ImageView rtCountIcon = (ImageView) view.findViewById(R.id.image_status_detail_rt_count);
-        TextView rtCountText = (TextView) view.findViewById(R.id.textview_status_detail_rt_count);
-        if (tweet.getRetweetCount() > 0) {
-            rtCountText.setText(Integer.toString(tweet.getRetweetCount()));
-            rtCountIcon.setVisibility(View.VISIBLE);
-            rtCountText.setVisibility(View.VISIBLE);
-        } else {
-            rtCountIcon.setVisibility(View.GONE);
-            rtCountText.setVisibility(View.GONE);
-        }
-    }
-
-    private void updateViewButtons(View view) {
-        Account account = getWorld().getAccount();
-
-        //--- buttons
-        ImageButton reply = (ImageButton) view.findViewById(R.id.button_status_detail_reply);
-        reply.setOnClickListener(this);
-
-        ToggleableImageButton retweet = (ToggleableImageButton) view.findViewById(R.id.button_status_detail_retweet);
-        retweet.setOnClickListener(this);
-        retweet.setState(tweet.isRetweetedBy(account.getUserId()));
-
-        ToggleableImageButton favorite = (ToggleableImageButton) view.findViewById(R.id.button_status_detail_favorite);
-        favorite.setOnClickListener(this);
-        favorite.setState(tweet.isFavoritedBy(account.getUserId()));
-
-        ImageButton delete = (ImageButton) view.findViewById(R.id.button_status_detail_delete);
-        delete.setOnClickListener(this);
-        delete.setVisibility(tweet.getOriginalTweet().getUser() == account.getUser() ? View.VISIBLE : View.GONE);
-
-        ImageButton menu = (ImageButton) view.findViewById(R.id.button_status_detail_menu);
-        menu.setOnClickListener(this);
-    }
-
-    private void setupViewMenu(View view) {
-        View divider = view.findViewById(R.id.detail_dialog_divider_bottom);
-        ListView listView = (ListView) view.findViewById(R.id.listview_status_detail_menu);
-        List<Command> commands = getCommands();
-        if (commands.size() > 0) {
-            divider.setVisibility(View.VISIBLE);
-            listView.setVisibility(View.VISIBLE);
-            final CustomListAdapter<Command> adapter = new CustomListAdapter<Command>() {
-                @Override
-                public View getView(int position, View convertView, ViewGroup parent) {
-                    if (convertView == null) {
-                        convertView = getActivity().getLayoutInflater().inflate(R.layout.menu_item_simple_text, null);
-                    }
-                    TextView textView = (TextView) convertView.findViewById(R.id.list_item_textview);
-                    textView.setTextSize(UserPreferenceHelper.getInstance().getTextSize());
-                    textView.setText(getItem(position).getText());
-                    return convertView;
-                }
-
-                @Override
-                protected List<Command> getList() {
-                    return commands;
-                }
-            };
-            adapter.update();
-            listView.setAdapter(adapter);
-            listView.setOnItemClickListener((parent, view1, position, id) -> {
-                Command command = (Command) parent.getItemAtPosition(position);
-                command.execute();
-            });
-        } else {
-            divider.setVisibility(View.GONE);
-            listView.setVisibility(View.GONE);
-        }
-    }
-
-    private void confirm(Runnable onYes) {
-        ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_commands), onYes);
-    }
-
-    private List<Command> getCommands() {
-        MainActivity activity = (MainActivity) getActivity();
-        ArrayList<Command> commands = new ArrayList<>();
-        // Retweeter
-        if (tweet.getRetweetedTweet() != null && tweet.getUser() != tweet.getRetweetedTweet().getUser())
-            commands.add(new CommandOpenUserDetail(activity, tweet.getUser().getScreenName()));
-        // Mentions
-        for (String screenName : new ArrayList<>(new LinkedHashSet<>(tweet.getMentions()))) { // Array#uniq
-            commands.add(new CommandOpenUserDetail(activity, screenName));
-        }
-        // Hashtags
-        for (String hashtag : tweet.getHashtags()) {
-            commands.add(new CommandAddHashtag(activity, hashtag));
-        }
-        // URL
-        for (String url : tweet.getUrlsExpanded()) {
-            commands.add(new CommandOpenURL(activity, url));
-        }
-        for (String url : tweet.getMediaUrls()) {
-            commands.add(new CommandOpenURL(activity, url));
-        }
-        return commands;
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/StatusDetailDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/StatusDetailDialogFragment.kt
new file mode 100644
index 00000000..c18b6b4d
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/StatusDetailDialogFragment.kt
@@ -0,0 +1,339 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.graphics.drawable.ColorDrawable
+import android.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageButton
+import android.widget.ImageView
+import android.widget.ListView
+import android.widget.TextView
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.command.Command
+import net.lacolaco.smileessence.command.CommandAddHashtag
+import net.lacolaco.smileessence.command.CommandOpenURL
+import net.lacolaco.smileessence.command.CommandOpenUserDetail
+import net.lacolaco.smileessence.data.Account
+import net.lacolaco.smileessence.entity.RBinding
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.preference.UserPreferenceHelper
+import net.lacolaco.smileessence.twitter.task.TweetReactions
+import net.lacolaco.smileessence.twitter.task.Tweets
+import net.lacolaco.smileessence.util.IntentUtils
+import net.lacolaco.smileessence.util.SystemServiceHelper
+import net.lacolaco.smileessence.util.UIObserverBundle
+import net.lacolaco.smileessence.view.DialogHelper
+import net.lacolaco.smileessence.view.Partials
+import net.lacolaco.smileessence.view.ToggleableImageButton
+import net.lacolaco.smileessence.view.adapter.CustomListAdapter
+import net.lacolaco.smileessence.view.adapter.TimelineAdapter
+
+import java.lang.ref.WeakReference
+import java.util.ArrayList
+import java.util.LinkedHashSet
+
+class StatusDetailDialogFragment : StackableDialogFragment(), View.OnClickListener {
+    private lateinit var tweet: Tweet
+
+    override fun onClick(v: View) {
+        when (v.id) {
+            R.id.button_status_detail_reply -> {
+                val originalTweet = tweet.originalTweet
+
+                val builder = StringBuilder()
+                builder.append("@" + originalTweet.user.screenName + " ")
+
+                for (screenName in originalTweet.mentions) {
+                    if (screenName != world.account.user.screenName)
+                        builder.append("@$screenName ")
+                }
+                val text = builder.toString()
+                val selStart = originalTweet.user.screenName.length + 2 // "@" and " "
+
+                world.postState.beginTransaction()
+                        .clear()
+                        .insertText(0, text)
+                        .setInReplyTo(originalTweet)
+                        .setSelection(selStart, text.length)
+                        .commitWithOpen(activity as MainActivity)
+            }
+            R.id.button_status_detail_retweet -> {
+                val account = world.account
+                confirm({
+                    if (tweet.isRetweetedBy(account.userId)) {
+                        Tweets.DestroyTask(account, tweet.getRetweetIdBy(account.userId))
+                                .onDone { t -> world.notify(R.string.notice_status_delete_succeeded) }
+                                .onFail { e -> world.notifyError(R.string.notice_status_delete_failed) }
+                                .execute()
+                        dismiss()
+                    } else {
+                        TweetReactions.RetweetTask(account, tweet.id)
+                                .onDone { x -> world.notify(R.string.notice_retweet_succeeded) }
+                                .onFail { x -> world.notifyError(R.string.notice_retweet_failed) }
+                                .execute()
+                    }
+                })
+            }
+            R.id.button_status_detail_favorite -> {
+                val account = world.account
+                if (tweet.isFavoritedBy(account.userId)) {
+                    TweetReactions.UnfavoriteTask(account, tweet.id)
+                            .onDone { x -> world.notify(R.string.notice_unfavorite_succeeded) }
+                            .onFail { x -> world.notifyError(R.string.notice_unfavorite_failed) }
+                            .execute()
+                } else {
+                    TweetReactions.FavoriteTask(account, tweet.id)
+                            .onDone { x -> world.notify(R.string.notice_favorite_succeeded) }
+                            .onFail { x -> world.notifyError(R.string.notice_favorite_failed) }
+                            .execute()
+                }
+            }
+            R.id.button_status_detail_delete -> {
+                confirm({
+                    Tweets.DestroyTask(world.account, tweet.originalTweet.id)
+                            .onDone { t -> world.notify(R.string.notice_status_delete_succeeded) }
+                            .onFail { e -> world.notifyError(R.string.notice_status_delete_failed) }
+                            .execute()
+                    dismiss()
+                })
+            }
+            R.id.button_status_detail_menu -> {
+                val builder = AlertDialog.Builder(activity)
+                builder.setTitle("@" + tweet.user.screenName + ": " + tweet.text)
+                        .setItems(R.array.status_commands) { dialog, which ->
+                            when (which) {
+                                0 -> {
+                                    val text = String.format("@%s ", tweet.originalTweet.user.screenName)
+                                    world.postState.beginTransaction().insertText(0, text).moveCursor(text.length).commit()
+                                    world.notify(R.string.notice_add_to_reply)
+                                }
+                                1 -> {
+                                    DialogHelper.showDialog(activity, TalkChainDialogFragment.newInstance(tweet))
+                                }
+                                2 -> IntentUtils.openUri(activity, tweet.originalTweet.twitterUrl)
+                                3 -> {
+                                    SystemServiceHelper.copyToClipboard(activity, "tweet text", tweet.originalTweet.text)
+                                    world.notify(R.string.notice_copy_clipboard)
+                                }
+                                4 -> {
+                                    val statusURL = tweet.originalTweet.twitterUrl
+                                    SystemServiceHelper.copyToClipboard(activity, "tweet url", statusURL)
+                                    world.notify(R.string.notice_copy_clipboard)
+                                }
+                                else -> throw IllegalStateException()
+                            }
+                        }
+                val dialog = builder.create()
+                dialog.show()
+            }
+            else -> {
+                dismiss()
+            }
+        }
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val found = Tweet.fetch(arguments.getLong(KEY_STATUS_ID))
+        if (found == null) { // trying to open deleted tweet?
+            world.notifyError(R.string.notice_error_show_status)
+            return DisposeDialog(activity)
+        }
+        tweet = found
+
+        val view = activity.layoutInflater.inflate(R.layout.dialog_status_detail, null)
+        val bundle = UIObserverBundle()
+        view.tag = bundle
+
+        val statusHeader = Partials.getTweetView(tweet, activity, view.findViewById(R.id.layout_status_header), true)
+        statusHeader.isClickable = false
+
+        view.setBackgroundColor((statusHeader.background as ColorDrawable).color)
+        updateViewReactions(view)
+        updateViewButtons(view)
+        setupViewMenu(view)
+
+        val weakView = WeakReference(view)
+        bundle.attach(tweet.originalTweet) { changes ->
+            val strongView = weakView.get()
+            if (strongView != null && activity != null) {
+                if (changes.contains(RBinding.REACTION_COUNT))
+                    updateViewReactions(strongView)
+                if (changes.contains(RBinding.FAVORITERS) || changes.contains(RBinding.RETWEETERS))
+                    updateViewButtons(strongView)
+            }
+        }
+
+        val listView = view.findViewById(R.id.listview_status_detail_reply_to) as ListView
+        val adapter = TimelineAdapter(activity)
+        listView.adapter = adapter
+
+        val replyDivider = view.findViewById(R.id.detail_dialog_divider_top)
+
+        if (tweet.inReplyToStatusId != -1L) {
+            replyDivider.visibility = View.VISIBLE
+            listView.visibility = View.VISIBLE
+            Tweet.fetchTask(tweet.inReplyToStatusId, world.account)
+                    .onDoneUI { replyTo ->
+                        adapter.add(replyTo)
+                        adapter.update()
+                    }
+                    .execute()
+        } else {
+            replyDivider.visibility = View.GONE
+            listView.visibility = View.GONE
+        }
+
+        return AlertDialog.Builder(activity).setView(view).create()
+    }
+
+    private fun updateViewReactions(view: View) {
+        val favCountIcon = view.findViewById(R.id.image_status_detail_fav_count) as ImageView
+        val favCountText = view.findViewById(R.id.textview_status_detail_fav_count) as TextView
+        if (tweet.favoriteCount > 0) {
+            favCountText.text = Integer.toString(tweet.favoriteCount)
+            favCountIcon.visibility = View.VISIBLE
+            favCountText.visibility = View.VISIBLE
+        } else {
+            favCountIcon.visibility = View.GONE
+            favCountText.visibility = View.GONE
+        }
+
+        val rtCountIcon = view.findViewById(R.id.image_status_detail_rt_count) as ImageView
+        val rtCountText = view.findViewById(R.id.textview_status_detail_rt_count) as TextView
+        if (tweet.retweetCount > 0) {
+            rtCountText.text = Integer.toString(tweet.retweetCount)
+            rtCountIcon.visibility = View.VISIBLE
+            rtCountText.visibility = View.VISIBLE
+        } else {
+            rtCountIcon.visibility = View.GONE
+            rtCountText.visibility = View.GONE
+        }
+    }
+
+    private fun updateViewButtons(view: View) {
+        val account = world.account
+
+        //--- buttons
+        val reply = view.findViewById(R.id.button_status_detail_reply) as ImageButton
+        reply.setOnClickListener(this)
+
+        val retweet = view.findViewById(R.id.button_status_detail_retweet) as ToggleableImageButton
+        retweet.setOnClickListener(this)
+        retweet.setState(tweet.isRetweetedBy(account.userId))
+
+        val favorite = view.findViewById(R.id.button_status_detail_favorite) as ToggleableImageButton
+        favorite.setOnClickListener(this)
+        favorite.setState(tweet.isFavoritedBy(account.userId))
+
+        val delete = view.findViewById(R.id.button_status_detail_delete) as ImageButton
+        delete.setOnClickListener(this)
+        delete.visibility = if (tweet.originalTweet.user === account.user) View.VISIBLE else View.GONE
+
+        val menu = view.findViewById(R.id.button_status_detail_menu) as ImageButton
+        menu.setOnClickListener(this)
+    }
+
+    private fun setupViewMenu(view: View) {
+        val divider = view.findViewById(R.id.detail_dialog_divider_bottom)
+        val listView = view.findViewById(R.id.listview_status_detail_menu) as ListView
+        val commands = commands
+        if (commands.size > 0) {
+            divider.visibility = View.VISIBLE
+            listView.visibility = View.VISIBLE
+            val adapter = object : CustomListAdapter<Command>() {
+                override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+                    var convertView = convertView
+                    if (convertView == null) {
+                        convertView = activity.layoutInflater.inflate(R.layout.menu_item_simple_text, null)
+                    }
+                    val textView = convertView!!.findViewById(R.id.list_item_textview) as TextView
+                    textView.textSize = UserPreferenceHelper.instance.textSize.toFloat()
+                    textView.text = getItem(position).text
+                    return convertView
+                }
+
+                override val list: List<Command>
+                    get() = commands
+            }
+            adapter.update()
+            listView.adapter = adapter
+            listView.setOnItemClickListener { parent, view1, position, id ->
+                val command = parent.getItemAtPosition(position) as Command
+                command.execute()
+            }
+        } else {
+            divider.visibility = View.GONE
+            listView.visibility = View.GONE
+        }
+    }
+
+    private fun confirm(onYes: () -> Unit) {
+        ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_commands), onYes)
+    }
+
+    private // Retweeter
+            // Mentions
+            // Array#uniq
+            // Hashtags
+            // URL
+    val commands: List<Command>
+        get() {
+            val activity = activity as MainActivity
+            val commands = ArrayList<Command>()
+            if (tweet.retweetedTweet != null && tweet.user !== tweet.retweetedTweet!!.user)
+                commands.add(CommandOpenUserDetail(activity, tweet.user.screenName))
+            for (screenName in ArrayList(LinkedHashSet(tweet.mentions))) {
+                commands.add(CommandOpenUserDetail(activity, screenName))
+            }
+            for (hashtag in tweet.hashtags) {
+                commands.add(CommandAddHashtag(activity, hashtag))
+            }
+            for (url in tweet.urlsExpanded) {
+                commands.add(CommandOpenURL(activity, url))
+            }
+            for (url in tweet.mediaUrls) {
+                commands.add(CommandOpenURL(activity, url))
+            }
+            return commands
+        }
+
+    companion object {
+        private val KEY_STATUS_ID = "status_id"
+
+        fun newInstance(tweet: Tweet): StatusDetailDialogFragment {
+            val obj = StatusDetailDialogFragment()
+            val args = Bundle()
+            args.putLong(KEY_STATUS_ID, tweet.id)
+            obj.arguments = args
+            return obj
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/TalkChainDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/TalkChainDialogFragment.java
deleted file mode 100644
index 95bbac5c..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/TalkChainDialogFragment.java
+++ /dev/null
@@ -1,89 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.os.Bundle;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ListView;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.data.Account;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.twitter.task.Tweets;
-import net.lacolaco.smileessence.view.Partials;
-import net.lacolaco.smileessence.view.adapter.CustomListAdapter;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class TalkChainDialogFragment extends StackableDialogFragment {
-    private static final String KEY_STATUS_ID = "KEY_STATUS_ID";
-
-    private long getStatusID() {
-        return getArguments().getLong(KEY_STATUS_ID);
-    }
-
-    public void setStatusID(long id) {
-        Bundle bundle = new Bundle();
-        bundle.putLong(KEY_STATUS_ID, id);
-        setArguments(bundle);
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        Account account = getWorld().getAccount();
-
-        View view = getActivity().getLayoutInflater().inflate(R.layout.dialog_talk_list, null);
-        ListView listView = (ListView) view.findViewById(R.id.listview_dialog_talk_list);
-        final List<Tweet> list = new ArrayList<>();
-        final CustomListAdapter<Tweet> adapter = new CustomListAdapter<Tweet>() {
-            @Override
-            public View getView(int position, View convertView, ViewGroup parent) {
-                return Partials.getTweetView(getItem(position), getActivity(), convertView, true);
-            }
-
-            @Override
-            protected List<Tweet> getList() {
-                return list;
-            }
-        };
-        listView.setAdapter(adapter);
-
-        new Tweets.GetTalkTask(account, getStatusID()).onProgressUI(tweet -> {
-            list.add(tweet);
-            adapter.updateForce();
-        }).execute();
-
-        return new AlertDialog.Builder(getActivity())
-                .setTitle(R.string.dialog_title_talk_chain)
-                .setView(view)
-                .setCancelable(true)
-                .create();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/TalkChainDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/TalkChainDialogFragment.kt
new file mode 100644
index 00000000..1b39e50a
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/TalkChainDialogFragment.kt
@@ -0,0 +1,81 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.os.Bundle
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ListView
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.twitter.task.Tweets
+import net.lacolaco.smileessence.view.Partials
+import net.lacolaco.smileessence.view.adapter.CustomListAdapter
+
+import java.util.ArrayList
+
+class TalkChainDialogFragment : StackableDialogFragment() {
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val account = world.account
+
+        val view = activity.layoutInflater.inflate(R.layout.dialog_talk_list, null)
+        val listView = view.findViewById(R.id.listview_dialog_talk_list) as ListView
+        val list = ArrayList<Tweet>()
+        val adapter = object : CustomListAdapter<Tweet>() {
+            override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+                return Partials.getTweetView(getItem(position), activity, convertView, true)
+            }
+
+            override val list: List<Tweet>
+                get() = list
+        }
+        listView.adapter = adapter
+
+        Tweets.GetTalkTask(account, arguments.getLong(KEY_STATUS_ID)).onProgressUI { tweet ->
+            list.add(tweet)
+            adapter.updateForce()
+        }.execute()
+
+        return AlertDialog.Builder(activity)
+                .setTitle(R.string.dialog_title_talk_chain)
+                .setView(view)
+                .setCancelable(true)
+                .create()
+    }
+
+    companion object {
+        private val KEY_STATUS_ID = "KEY_STATUS_ID"
+
+        fun newInstance(tweet: Tweet): TalkChainDialogFragment {
+            val obj = TalkChainDialogFragment()
+            val bundle = Bundle()
+            bundle.putLong(KEY_STATUS_ID, tweet.originalTweet.id)
+            obj.arguments = bundle
+            return obj
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/UserDetailDialogFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/dialog/UserDetailDialogFragment.java
deleted file mode 100644
index c8d62fa8..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/dialog/UserDetailDialogFragment.java
+++ /dev/null
@@ -1,423 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.dialog;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.os.Bundle;
-import android.text.Html;
-import android.text.TextUtils;
-import android.text.method.LinkMovementMethod;
-import android.view.View;
-import android.widget.AbsListView;
-import android.widget.ListView;
-import android.widget.TabHost;
-import android.widget.TextView;
-import com.android.volley.toolbox.NetworkImageView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import com.handmark.pulltorefresh.library.PullToRefreshListView;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.data.Account;
-import net.lacolaco.smileessence.data.ImageCache;
-import net.lacolaco.smileessence.entity.RBinding;
-import net.lacolaco.smileessence.entity.User;
-import net.lacolaco.smileessence.twitter.task.Timelines;
-import net.lacolaco.smileessence.twitter.task.Users;
-import net.lacolaco.smileessence.util.IntentUtils;
-import net.lacolaco.smileessence.util.UIHandler;
-import net.lacolaco.smileessence.util.UIObserverBundle;
-import net.lacolaco.smileessence.view.DialogHelper;
-import net.lacolaco.smileessence.view.ThreeStateButton;
-import net.lacolaco.smileessence.view.adapter.TimelineAdapter;
-
-public class UserDetailDialogFragment extends StackableDialogFragment implements View.OnClickListener,
-        PullToRefreshBase.OnRefreshListener2<ListView> {
-
-    // ------------------------------ FIELDS ------------------------------
-
-    private static final String KEY_USER_ID = "userID";
-    private TimelineAdapter adapter;
-    private TextView textViewScreenName;
-    private TextView textViewName;
-    private TextView textViewURL;
-    private TextView textViewLocate;
-    private TextView textViewFollowed;
-    private TextView textViewProtected;
-    private TextView textViewDescription;
-    private TextView textViewTweetCount;
-    private TextView textViewFriendCount;
-    private TextView textViewFollowerCount;
-    private TextView textViewFavoriteCount;
-    private NetworkImageView imageViewIcon;
-    private NetworkImageView imageViewHeader;
-    private ThreeStateButton buttonFollow;
-    private PullToRefreshListView listViewTimeline;
-    private TabHost tabHost;
-    private UIObserverBundle observerBundle;
-    private User user;
-
-    // --------------------- GETTER / SETTER METHODS ---------------------
-
-    public long getUserID() {
-        return getArguments().getLong(KEY_USER_ID);
-    }
-
-    public void setUserID(long userID) {
-        Bundle args = new Bundle();
-        args.putLong(KEY_USER_ID, userID);
-        setArguments(args);
-    }
-
-    // ------------------------ INTERFACE METHODS ------------------------
-
-
-    // --------------------- Interface OnClickListener ---------------------
-
-    @Override
-    public void onClick(final View v) {
-        switch (v.getId()) {
-            case R.id.imageview_user_detail_menu: {
-                openUserMenu();
-                break;
-            }
-            case R.id.imageview_user_detail_icon: {
-                IntentUtils.openUri(getActivity(), user.getProfileImageUrlOriginal());
-                break;
-            }
-            case R.id.textview_user_detail_screenname:
-            case R.id.textview_user_detail_tweet_count: {
-                IntentUtils.openUri(getActivity(), user.getUserHomeURL());
-                break;
-            }
-            case R.id.textview_user_detail_friend_count: {
-                IntentUtils.openUri(getActivity(), String.format("%s/following", user.getUserHomeURL()));
-                break;
-            }
-            case R.id.textview_user_detail_follower_count: {
-                IntentUtils.openUri(getActivity(), String.format("%s/followers", user.getUserHomeURL()));
-                break;
-            }
-            case R.id.textview_user_detail_favorite_count: {
-                IntentUtils.openUri(getActivity(), String.format("%s/favorites", user.getUserHomeURL()));
-                break;
-            }
-            case R.id.button_user_detail_follow: {
-                ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_commands), this::toggleFollowing);
-                break;
-            }
-        }
-    }
-
-    // --------------------- Interface OnRefreshListener2 ---------------------
-
-    @Override
-    public void onPullDownToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        Account currentAccount = getWorld().getAccount();
-        new Timelines.UserTimelineTask(currentAccount, getUserID())
-                .setCount(200)
-                .setSinceId(adapter.getTopID())
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_get_user_timeline))
-                .onDoneUI(tweets -> {
-                    adapter.addAll(tweets);
-                    updateListView(refreshView.getRefreshableView(), adapter, true);
-                    refreshView.onRefreshComplete();
-                })
-                .execute();
-    }
-
-    @Override
-    public void onPullUpToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        Account currentAccount = getWorld().getAccount();
-        new Timelines.UserTimelineTask(currentAccount, getUserID())
-                .setCount(200)
-                .setMaxId(adapter.getLastID() - 1)
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_get_user_timeline))
-                .onDoneUI(tweets -> {
-                    adapter.addAll(tweets);
-                    updateListView(refreshView.getRefreshableView(), adapter, false);
-                    refreshView.onRefreshComplete();
-                })
-                .execute();
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        user = User.fetch(getUserID());
-        observerBundle = new UIObserverBundle();
-    }
-
-    @Override
-    public void onDestroy() {
-        super.onDestroy();
-        observerBundle.detachAll();
-    }
-
-    @Override
-    public Dialog onCreateDialog(Bundle savedInstanceState) {
-        MainActivity activity = (MainActivity) getActivity();
-        if (user == null) {
-            getWorld().notify(R.string.notice_error_show_user);
-            return new DisposeDialog(activity);
-        }
-
-        View v = activity.getLayoutInflater().inflate(R.layout.dialog_user_detail, null);
-        View menu = v.findViewById(R.id.imageview_user_detail_menu);
-        menu.setOnClickListener(this);
-        textViewScreenName = (TextView) v.findViewById(R.id.textview_user_detail_screenname);
-        textViewScreenName.setOnClickListener(this);
-        textViewName = (TextView) v.findViewById(R.id.textview_user_detail_name);
-        textViewURL = (TextView) v.findViewById(R.id.textview_user_detail_url);
-        textViewLocate = (TextView) v.findViewById(R.id.textview_user_detail_locate);
-        textViewFollowed = (TextView) v.findViewById(R.id.textview_user_detail_followed);
-        textViewProtected = (TextView) v.findViewById(R.id.texttview_user_detail_protected);
-        textViewDescription = (TextView) v.findViewById(R.id.textview_user_detail_description);
-        textViewDescription.setMovementMethod(LinkMovementMethod.getInstance());
-        textViewTweetCount = (TextView) v.findViewById(R.id.textview_user_detail_tweet_count);
-        textViewTweetCount.setOnClickListener(this);
-        textViewFriendCount = (TextView) v.findViewById(R.id.textview_user_detail_friend_count);
-        textViewFriendCount.setOnClickListener(this);
-        textViewFollowerCount = (TextView) v.findViewById(R.id.textview_user_detail_follower_count);
-        textViewFollowerCount.setOnClickListener(this);
-        textViewFavoriteCount = (TextView) v.findViewById(R.id.textview_user_detail_favorite_count);
-        textViewFavoriteCount.setOnClickListener(this);
-        imageViewIcon = (NetworkImageView) v.findViewById(R.id.imageview_user_detail_icon);
-        imageViewIcon.setOnClickListener(this);
-        imageViewHeader = (NetworkImageView) v.findViewById(R.id.imageview_user_detail_header);
-        buttonFollow = (ThreeStateButton) v.findViewById(R.id.button_user_detail_follow);
-        buttonFollow.setOnClickListener(this);
-        listViewTimeline = (PullToRefreshListView) v.findViewById(R.id.listview_user_detail_timeline);
-        listViewTimeline.setOnRefreshListener(this);
-
-        tabHost = (TabHost) v.findViewById(android.R.id.tabhost);
-        tabHost.setup();
-        TabHost.TabSpec tab1 = tabHost.newTabSpec("tab1").setContent(R.id.tab1).setIndicator(getString(R.string.user_detail_tab_info));
-        tabHost.addTab(tab1);
-        TabHost.TabSpec tab2 = tabHost.newTabSpec("tab2").setContent(R.id.tab2).setIndicator(getString(R.string.user_detail_tab_timeline));
-        tabHost.addTab(tab2);
-        tabHost.setCurrentTab(0);
-
-        initUserData();
-
-        return new AlertDialog.Builder(activity)
-                .setView(v)
-                .setCancelable(true)
-                .create();
-    }
-
-    private void executeUserTimelineTask(final TimelineAdapter adapter) {
-        Account account = getWorld().getAccount();
-        tabHost.getTabWidget().getChildTabViewAt(1).setVisibility(View.GONE);
-        new Timelines.UserTimelineTask(account, user.getId())
-                .setCount(200)
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_get_user_timeline))
-                .onDoneUI(tweets -> {
-                    adapter.addAll(tweets);
-                    adapter.updateForce();
-                    tabHost.getTabWidget().getChildTabViewAt(1).setVisibility(View.VISIBLE);
-                })
-                .execute();
-    }
-
-    private String getHtmlDescription() {
-        String description = user.getDescription();
-        if (TextUtils.isEmpty(description)) {
-            return "";
-        }
-        String html = description;
-        html = html.replaceAll("https?://[\\w/:%#$&?()~.=+-]+", "<a href=\"$0\">$0</a>");
-        html = html.replaceAll("@([a-zA-Z0-9_]+)", "<a href=\"https://twitter.com/$1\">$0</a>");
-        html = html.replaceAll("\r\n", "<br />");
-        return html;
-    }
-
-    private void updateUserDataBasic() {
-        textViewName.setText(user.getName());
-        textViewScreenName.setText(user.getScreenName());
-        textViewProtected.setVisibility(user.isProtected() ? View.VISIBLE : View.GONE);
-        imageViewIcon.setImageUrl(user.getProfileImageUrlOriginal(), ImageCache.getImageLoader());
-    }
-
-    private void updateUserDataDetail() {
-        if (TextUtils.isEmpty(user.getLocation())) {
-            textViewLocate.setVisibility(View.GONE);
-        } else {
-            textViewLocate.setText(user.getLocation());
-            textViewLocate.setVisibility(View.VISIBLE);
-        }
-        if (TextUtils.isEmpty(user.getUrl())) {
-            textViewURL.setVisibility(View.GONE);
-        } else {
-            textViewURL.setText(user.getUrl());
-            textViewURL.setVisibility(View.VISIBLE);
-        }
-        textViewDescription.setText(Html.fromHtml(getHtmlDescription()));
-
-        textViewTweetCount.setText(String.valueOf(user.getStatusesCount()));
-        textViewFriendCount.setText(String.valueOf(user.getFriendsCount()));
-        textViewFollowerCount.setText(String.valueOf(user.getFollowersCount()));
-        textViewFavoriteCount.setText(String.valueOf(user.getFavoritesCount()));
-
-        imageViewHeader.setImageUrl(user.getProfileBannerUrl(), ImageCache.getImageLoader());
-    }
-
-    private void initUserData() {
-        updateUserDataBasic();
-        updateUserDataDetail();
-
-        MainActivity activity = (MainActivity) getActivity();
-        adapter = new TimelineAdapter(activity);
-        listViewTimeline.setAdapter(adapter);
-        executeUserTimelineTask(adapter);
-        updateRelationship();
-
-        observerBundle.attach(user, changes -> {
-            if (getActivity() != null) {
-                if (changes.contains(RBinding.BASIC))
-                    updateUserDataBasic();
-                if (changes.contains(RBinding.DETAIL))
-                    updateUserDataDetail();
-            }
-        });
-    }
-
-    private void openUserMenu() {
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-        builder.setTitle("@" + user.getScreenName())
-                .setItems(R.array.user_commands, (dialog, which) -> {
-                    // XXX
-                    new UIHandler().postDelayed(() -> {
-                        if (UserDetailDialogFragment.this.isAdded()) {
-                            updateRelationship();
-                        }
-                    }, 1000);
-                    switch (which) {
-                        case 0:
-                            String text = String.format("@%s ", user.getScreenName());
-                            getWorld().getPostState().beginTransaction().insertText(0, text).moveCursor(text.length()).commit();
-                            getWorld().notify(R.string.notice_add_to_reply);
-                            break;
-                        case 1:
-                            DialogHelper.showDialog(getActivity(), SendMessageDialogFragment.newInstance(user));
-                            break;
-                        case 2:
-                            ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_commands), () ->
-                                    new Users.BlockTask(getWorld().getAccount(), user.getId())
-                                            .onDone(user -> getWorld().notify(R.string.notice_block_succeeded))
-                                            .onFail(ex -> getWorld().notifyError(R.string.notice_block_failed))
-                                            .execute());
-                            break;
-                        case 3:
-                            ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_commands), () ->
-                                    new Users.UnblockTask(getWorld().getAccount(), user.getId())
-                                            .onDone(user -> getWorld().notify(R.string.notice_unblock_succeeded))
-                                            .onFail(x -> getWorld().notifyError(R.string.notice_unblock_failed))
-                                            .execute());
-                            break;
-                        case 4:
-                            ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_commands), () ->
-                                    new Users.ReportForSpamTask(getWorld().getAccount(), user.getId())
-                                            .onDone(user -> getWorld().notify(R.string.notice_r4s_succeeded))
-                                            .onFail(ex -> getWorld().notifyError(R.string.notice_r4s_failed))
-                                            .execute());
-                            break;
-                        case 5:
-                            IntentUtils.openUri(getActivity(), user.getAclogTimelineURL());
-                            break;
-                        default:
-                            throw new IllegalStateException();
-                    }
-                });
-        AlertDialog dialog = builder.create();
-        dialog.show();
-    }
-
-    private void setFollowButtonState(boolean isFollowing) {
-        MainActivity mainActivity = (MainActivity) getActivity();
-        if (mainActivity != null) {
-            buttonFollow.setState(isFollowing ? ThreeStateButton.STATE_ON : ThreeStateButton.STATE_OFF);
-        }
-    }
-
-    private void toggleFollowing() {
-        Account account = getWorld().getAccount();
-        Boolean isFollowing = buttonFollow.getState() == ThreeStateButton.STATE_ON;
-        buttonFollow.setState(ThreeStateButton.STATE_LOCKED);
-        if (isFollowing) {
-            new Users.UnfollowTask(account, user.getId())
-                    .onDoneUI(result -> {
-                        getWorld().notify(R.string.notice_unfollow_succeeded);
-                        updateRelationship();
-                    })
-                    .onFail(x ->
-                            getWorld().notifyError(R.string.notice_unfollow_failed))
-                    .execute();
-        } else {
-            new Users.FollowTask(account, user.getId())
-                    .onDoneUI(result -> {
-                        getWorld().notify(R.string.notice_follow_succeeded);
-                        updateRelationship();
-                    })
-                    .onFail(x -> getWorld().notifyError(R.string.notice_follow_failed))
-                    .execute();
-        }
-    }
-
-    private void updateListView(AbsListView absListView, TimelineAdapter adapter, boolean addedToTop) {
-        int before = adapter.getCount();
-        adapter.notifyDataSetChanged(); // synchronized call (not adapter#updateForce())
-        int after = adapter.getCount();
-        int increments = after - before;
-        if (increments > 0) {
-            if (addedToTop) {
-                absListView.setSelection(increments + 1);
-                absListView.smoothScrollToPositionFromTop(increments, 0);
-                absListView.setSelection(increments);
-            } else {
-                absListView.smoothScrollToPositionFromTop(before, 0);
-            }
-        }
-    }
-
-    private void updateRelationship() {
-        Account account = getWorld().getAccount();
-        if (user == account.getUser()) {
-            textViewFollowed.setText(R.string.user_detail_followed_is_me);
-            buttonFollow.setVisibility(View.GONE);
-        } else {
-            buttonFollow.setState(ThreeStateButton.STATE_LOCKED);
-            textViewFollowed.setText(R.string.user_detail_loading);
-            new Users.ShowFriendshipTask(account, user.getId()).onDoneUI(relationship -> {
-                boolean isFollowing = relationship.isSourceFollowingTarget();
-                boolean isFollowed = relationship.isSourceFollowedByTarget();
-                setFollowButtonState(isFollowing);
-                textViewFollowed.setText(isFollowed ? R.string.user_detail_followed : R.string.user_detail_not_followed);
-            }).execute();
-        }
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/dialog/UserDetailDialogFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/dialog/UserDetailDialogFragment.kt
new file mode 100644
index 00000000..228a000a
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/dialog/UserDetailDialogFragment.kt
@@ -0,0 +1,390 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.dialog
+
+import android.app.AlertDialog
+import android.app.Dialog
+import android.os.Bundle
+import android.text.Html
+import android.text.TextUtils
+import android.text.method.LinkMovementMethod
+import android.view.View
+import android.widget.AbsListView
+import android.widget.ListView
+import android.widget.TabHost
+import android.widget.TextView
+import com.android.volley.toolbox.NetworkImageView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import com.handmark.pulltorefresh.library.PullToRefreshListView
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.data.ImageCache
+import net.lacolaco.smileessence.entity.RBinding
+import net.lacolaco.smileessence.entity.User
+import net.lacolaco.smileessence.twitter.task.Timelines
+import net.lacolaco.smileessence.twitter.task.Users
+import net.lacolaco.smileessence.util.IntentUtils
+import net.lacolaco.smileessence.util.UIHandler
+import net.lacolaco.smileessence.util.UIObserverBundle
+import net.lacolaco.smileessence.view.DialogHelper
+import net.lacolaco.smileessence.view.ThreeStateButton
+import net.lacolaco.smileessence.view.adapter.TimelineAdapter
+
+class UserDetailDialogFragment : StackableDialogFragment(), View.OnClickListener, PullToRefreshBase.OnRefreshListener2<ListView> {
+    private lateinit var adapter: TimelineAdapter
+    private lateinit var textViewScreenName: TextView
+    private lateinit var textViewName: TextView
+    private lateinit var textViewURL: TextView
+    private lateinit var textViewLocate: TextView
+    private lateinit var textViewFollowed: TextView
+    private lateinit var textViewProtected: TextView
+    private lateinit var textViewDescription: TextView
+    private lateinit var textViewTweetCount: TextView
+    private lateinit var textViewFriendCount: TextView
+    private lateinit var textViewFollowerCount: TextView
+    private lateinit var textViewFavoriteCount: TextView
+    private lateinit var imageViewIcon: NetworkImageView
+    private lateinit var imageViewHeader: NetworkImageView
+    private lateinit var buttonFollow: ThreeStateButton
+    private lateinit var listViewTimeline: PullToRefreshListView
+    private lateinit var tabHost: TabHost
+    private lateinit var observerBundle: UIObserverBundle
+    private lateinit var user: User
+
+    override fun onClick(v: View) {
+        when (v.id) {
+            R.id.imageview_user_detail_menu -> {
+                openUserMenu()
+            }
+            R.id.imageview_user_detail_icon -> {
+                IntentUtils.openUri(activity, user.profileImageUrl!!)
+            }
+            R.id.textview_user_detail_screenname, R.id.textview_user_detail_tweet_count -> {
+                IntentUtils.openUri(activity, user.userHomeURL)
+            }
+            R.id.textview_user_detail_friend_count -> {
+                IntentUtils.openUri(activity, String.format("%s/following", user.userHomeURL))
+            }
+            R.id.textview_user_detail_follower_count -> {
+                IntentUtils.openUri(activity, String.format("%s/followers", user.userHomeURL))
+            }
+            R.id.textview_user_detail_favorite_count -> {
+                IntentUtils.openUri(activity, String.format("%s/favorites", user.userHomeURL))
+            }
+            R.id.button_user_detail_follow -> {
+                ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_commands)) { this.toggleFollowing() }
+            }
+        }
+    }
+
+    // --------------------- Interface OnRefreshListener2 ---------------------
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        val currentAccount = world.account
+        Timelines.UserTimelineTask(currentAccount, user.id)
+                .setCount(200)
+                .setSinceId(adapter.topID)
+                .onFail { x -> world.notifyError(R.string.notice_error_get_user_timeline) }
+                .onDoneUI { tweets ->
+                    adapter.addAll(tweets)
+                    updateListView(refreshView.refreshableView, adapter, true)
+                    refreshView.onRefreshComplete()
+                }
+                .execute()
+    }
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        val currentAccount = world.account
+        Timelines.UserTimelineTask(currentAccount, user.id)
+                .setCount(200)
+                .setMaxId(adapter.lastID - 1)
+                .onFail { x -> world.notifyError(R.string.notice_error_get_user_timeline) }
+                .onDoneUI { tweets ->
+                    adapter.addAll(tweets)
+                    updateListView(refreshView.refreshableView, adapter, false)
+                    refreshView.onRefreshComplete()
+                }
+                .execute()
+    }
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun onCreate(savedInstanceState: Bundle) {
+        super.onCreate(savedInstanceState)
+        observerBundle = UIObserverBundle()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        observerBundle.detachAll()
+    }
+
+    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
+        val activity = activity as MainActivity
+        val found = User.fetch(arguments.getLong(KEY_USER_ID))
+        if (found == null) {
+            world.notify(R.string.notice_error_show_user)
+            return DisposeDialog(activity)
+        }
+        user = found
+
+        val v = activity.layoutInflater.inflate(R.layout.dialog_user_detail, null)
+        val menu = v.findViewById(R.id.imageview_user_detail_menu)
+        menu.setOnClickListener(this)
+        textViewScreenName = v.findViewById(R.id.textview_user_detail_screenname) as TextView
+        textViewScreenName.setOnClickListener(this)
+        textViewName = v.findViewById(R.id.textview_user_detail_name) as TextView
+        textViewURL = v.findViewById(R.id.textview_user_detail_url) as TextView
+        textViewLocate = v.findViewById(R.id.textview_user_detail_locate) as TextView
+        textViewFollowed = v.findViewById(R.id.textview_user_detail_followed) as TextView
+        textViewProtected = v.findViewById(R.id.texttview_user_detail_protected) as TextView
+        textViewDescription = v.findViewById(R.id.textview_user_detail_description) as TextView
+        textViewDescription.movementMethod = LinkMovementMethod.getInstance()
+        textViewTweetCount = v.findViewById(R.id.textview_user_detail_tweet_count) as TextView
+        textViewTweetCount.setOnClickListener(this)
+        textViewFriendCount = v.findViewById(R.id.textview_user_detail_friend_count) as TextView
+        textViewFriendCount.setOnClickListener(this)
+        textViewFollowerCount = v.findViewById(R.id.textview_user_detail_follower_count) as TextView
+        textViewFollowerCount.setOnClickListener(this)
+        textViewFavoriteCount = v.findViewById(R.id.textview_user_detail_favorite_count) as TextView
+        textViewFavoriteCount.setOnClickListener(this)
+        imageViewIcon = v.findViewById(R.id.imageview_user_detail_icon) as NetworkImageView
+        imageViewIcon.setOnClickListener(this)
+        imageViewHeader = v.findViewById(R.id.imageview_user_detail_header) as NetworkImageView
+        buttonFollow = v.findViewById(R.id.button_user_detail_follow) as ThreeStateButton
+        buttonFollow.setOnClickListener(this)
+        listViewTimeline = v.findViewById(R.id.listview_user_detail_timeline) as PullToRefreshListView
+        listViewTimeline.setOnRefreshListener(this)
+
+        tabHost = v.findViewById(android.R.id.tabhost) as TabHost
+        tabHost.setup()
+        val tab1 = tabHost.newTabSpec("tab1").setContent(R.id.tab1).setIndicator(getString(R.string.user_detail_tab_info))
+        tabHost.addTab(tab1)
+        val tab2 = tabHost.newTabSpec("tab2").setContent(R.id.tab2).setIndicator(getString(R.string.user_detail_tab_timeline))
+        tabHost.addTab(tab2)
+        tabHost.currentTab = 0
+
+        initUserData()
+
+        return AlertDialog.Builder(activity)
+                .setView(v)
+                .setCancelable(true)
+                .create()
+    }
+
+    private fun executeUserTimelineTask(adapter: TimelineAdapter) {
+        val account = world.account
+        tabHost.tabWidget.getChildTabViewAt(1).visibility = View.GONE
+        Timelines.UserTimelineTask(account, user.id)
+                .setCount(200)
+                .onFail { x -> world.notifyError(R.string.notice_error_get_user_timeline) }
+                .onDoneUI { tweets ->
+                    adapter.addAll(tweets)
+                    adapter.updateForce()
+                    tabHost.tabWidget.getChildTabViewAt(1).visibility = View.VISIBLE
+                }
+                .execute()
+    }
+
+    private val htmlDescription: String?
+        get() {
+            val description = user.description
+            if (TextUtils.isEmpty(description)) {
+                return ""
+            }
+            var html = description
+            html = html!!.replace("https?://[\\w/:%#$&?()~.=+-]+".toRegex(), "<a href=\"$0\">$0</a>")
+            html = html.replace("@([a-zA-Z0-9_]+)".toRegex(), "<a href=\"https://twitter.com/$1\">$0</a>")
+            html = html.replace("\r\n".toRegex(), "<br />")
+            return html
+        }
+
+    private fun updateUserDataBasic() {
+        textViewName.text = user.name
+        textViewScreenName.text = user.screenName
+        textViewProtected.visibility = if (user.isProtected) View.VISIBLE else View.GONE
+        imageViewIcon.setImageUrl(user.profileImageUrl, ImageCache.getImageLoader())
+    }
+
+    private fun updateUserDataDetail() {
+        if (TextUtils.isEmpty(user.location)) {
+            textViewLocate.visibility = View.GONE
+        } else {
+            textViewLocate.text = user.location
+            textViewLocate.visibility = View.VISIBLE
+        }
+        if (TextUtils.isEmpty(user.url)) {
+            textViewURL.visibility = View.GONE
+        } else {
+            textViewURL.text = user.url
+            textViewURL.visibility = View.VISIBLE
+        }
+        textViewDescription.text = Html.fromHtml(htmlDescription)
+
+        textViewTweetCount.text = user.statusesCount.toString()
+        textViewFriendCount.text = user.friendsCount.toString()
+        textViewFollowerCount.text = user.followersCount.toString()
+        textViewFavoriteCount.text = user.favoritesCount.toString()
+
+        imageViewHeader.setImageUrl(user.profileBannerUrl, ImageCache.getImageLoader())
+    }
+
+    private fun initUserData() {
+        updateUserDataBasic()
+        updateUserDataDetail()
+
+        val activity = activity as MainActivity
+        adapter = TimelineAdapter(activity)
+        listViewTimeline.setAdapter(adapter)
+        executeUserTimelineTask(adapter)
+        updateRelationship()
+
+        observerBundle.attach(user) { changes ->
+            if (getActivity() != null) {
+                if (changes.contains(RBinding.BASIC))
+                    updateUserDataBasic()
+                if (changes.contains(RBinding.DETAIL))
+                    updateUserDataDetail()
+            }
+        }
+    }
+
+    private fun openUserMenu() {
+        val builder = AlertDialog.Builder(activity)
+        builder.setTitle("@" + user.screenName)
+                .setItems(R.array.user_commands) { dialog, which ->
+                    // XXX
+                    UIHandler().postDelayed({
+                        if (this@UserDetailDialogFragment.isAdded) {
+                            updateRelationship()
+                        }
+                    }, 1000)
+                    when (which) {
+                        0 -> {
+                            val text = String.format("@%s ", user.screenName)
+                            world.postState.beginTransaction().insertText(0, text).moveCursor(text.length).commit()
+                            world.notify(R.string.notice_add_to_reply)
+                        }
+                        1 -> DialogHelper.showDialog(activity, SendMessageDialogFragment.newInstance(user))
+                        2 -> ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_commands)) {
+                            Users.BlockTask(world.account, user.id)
+                                    .onDone { user -> world.notify(R.string.notice_block_succeeded) }
+                                    .onFail { ex -> world.notifyError(R.string.notice_block_failed) }
+                                    .execute()
+                        }
+                        3 -> ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_commands)) {
+                            Users.UnblockTask(world.account, user.id)
+                                    .onDone { user -> world.notify(R.string.notice_unblock_succeeded) }
+                                    .onFail { x -> world.notifyError(R.string.notice_unblock_failed) }
+                                    .execute()
+                        }
+                        4 -> ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_commands)) {
+                            Users.ReportForSpamTask(world.account, user.id)
+                                    .onDone { user -> world.notify(R.string.notice_r4s_succeeded) }
+                                    .onFail { ex -> world.notifyError(R.string.notice_r4s_failed) }
+                                    .execute()
+                        }
+                        5 -> IntentUtils.openUri(activity, user.aclogTimelineURL)
+                        else -> throw IllegalStateException()
+                    }
+                }
+        val dialog = builder.create()
+        dialog.show()
+    }
+
+    private fun setFollowButtonState(isFollowing: Boolean) {
+        if (activity != null) {
+            buttonFollow.state = if (isFollowing) ThreeStateButton.STATE_ON else ThreeStateButton.STATE_OFF
+        }
+    }
+
+    private fun toggleFollowing() {
+        val account = world.account
+        val isFollowing = buttonFollow.state == ThreeStateButton.STATE_ON
+        buttonFollow.state = ThreeStateButton.STATE_LOCKED
+        if (isFollowing) {
+            Users.UnfollowTask(account, user.id)
+                    .onDoneUI { result ->
+                        world.notify(R.string.notice_unfollow_succeeded)
+                        updateRelationship()
+                    }
+                    .onFail { x -> world.notifyError(R.string.notice_unfollow_failed) }
+                    .execute()
+        } else {
+            Users.FollowTask(account, user.id)
+                    .onDoneUI { result ->
+                        world.notify(R.string.notice_follow_succeeded)
+                        updateRelationship()
+                    }
+                    .onFail { x -> world.notifyError(R.string.notice_follow_failed) }
+                    .execute()
+        }
+    }
+
+    private fun updateListView(absListView: AbsListView, adapter: TimelineAdapter, addedToTop: Boolean) {
+        val before = adapter.count
+        adapter.notifyDataSetChanged() // synchronized call (not adapter#updateForce())
+        val after = adapter.count
+        val increments = after - before
+        if (increments > 0) {
+            if (addedToTop) {
+                absListView.setSelection(increments + 1)
+                absListView.smoothScrollToPositionFromTop(increments, 0)
+                absListView.setSelection(increments)
+            } else {
+                absListView.smoothScrollToPositionFromTop(before, 0)
+            }
+        }
+    }
+
+    private fun updateRelationship() {
+        val account = world.account
+        if (user === account.user) {
+            textViewFollowed.setText(R.string.user_detail_followed_is_me)
+            buttonFollow.visibility = View.GONE
+        } else {
+            buttonFollow.state = ThreeStateButton.STATE_LOCKED
+            textViewFollowed.setText(R.string.user_detail_loading)
+            Users.ShowFriendshipTask(account, user.id).onDoneUI { relationship ->
+                val isFollowing = relationship.isSourceFollowingTarget
+                val isFollowed = relationship.isSourceFollowedByTarget
+                setFollowButtonState(isFollowing)
+                textViewFollowed.setText(if (isFollowed) R.string.user_detail_followed else R.string.user_detail_not_followed)
+            }.execute()
+        }
+    }
+
+    companion object {
+        private val KEY_USER_ID = "userID"
+
+        fun newInstance(user: User): UserDetailDialogFragment {
+            val obj = UserDetailDialogFragment()
+            val bundle = Bundle()
+            bundle.putLong(KEY_USER_ID, user.id)
+            obj.arguments = bundle
+            return obj
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/listener/ListItemClickListener.java b/app/src/main/java/net/lacolaco/smileessence/view/listener/ListItemClickListener.kt
index 22d6180f..20404c63 100644
--- a/app/src/main/java/net/lacolaco/smileessence/view/listener/ListItemClickListener.java
+++ b/app/src/main/java/net/lacolaco/smileessence/view/listener/ListItemClickListener.kt
@@ -22,42 +22,35 @@
  * SOFTWARE.
  */
 
-package net.lacolaco.smileessence.view.listener;
+package net.lacolaco.smileessence.view.listener
 
-import android.app.Activity;
-import android.graphics.drawable.ColorDrawable;
-import android.support.v4.content.ContextCompat;
-import android.view.View;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.util.UIHandler;
+import android.app.Activity
+import android.graphics.drawable.ColorDrawable
+import android.support.v4.content.ContextCompat
+import android.view.View
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.util.UIHandler
 
-public class ListItemClickListener implements View.OnClickListener {
+class ListItemClickListener
+// --------------------------- CONSTRUCTORS ---------------------------
 
-    // ------------------------------ FIELDS ------------------------------
+(
+        // ------------------------------ FIELDS ------------------------------
 
-    private final Activity activity;
-    private final Runnable callback;
-
-    // --------------------------- CONSTRUCTORS ---------------------------
-
-    public ListItemClickListener(Activity activity, Runnable callback) {
-        this.activity = activity;
-        this.callback = callback;
-    }
+        private val activity: Activity, private val callback: () -> Unit) : View.OnClickListener {
 
     // ------------------------ INTERFACE METHODS ------------------------
 
 
     // --------------------- Interface OnClickListener ---------------------
 
-    @Override
-    public void onClick(final View v) {
-        final int currentBgColor = ((ColorDrawable) v.getBackground()).getColor();
-        v.setBackgroundColor(ContextCompat.getColor(activity, R.color.metro_blue));
-        v.invalidate();
-        new UIHandler().post(() -> {
-            v.setBackgroundColor(currentBgColor);
-            callback.run();
-        });
+    override fun onClick(v: View) {
+        val currentBgColor = (v.background as ColorDrawable).color
+        v.setBackgroundColor(ContextCompat.getColor(activity, R.color.metro_blue))
+        v.invalidate()
+        UIHandler().post {
+            v.setBackgroundColor(currentBgColor)
+            callback()
+        }
     }
 }
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/CustomListFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/CustomListFragment.java
deleted file mode 100644
index 0dd24e67..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/CustomListFragment.java
+++ /dev/null
@@ -1,117 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.os.Bundle;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.AbsListView;
-import android.widget.ListView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import com.handmark.pulltorefresh.library.PullToRefreshListView;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.World;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.view.adapter.CustomListAdapter;
-
-public abstract class CustomListFragment<T extends CustomListAdapter> extends PageFragment<T> implements AbsListView.OnScrollListener,
-        PullToRefreshBase.OnRefreshListener2<ListView> {
-
-    // --------------------- GETTER / SETTER METHODS ---------------------
-
-    protected PullToRefreshBase.Mode getRefreshMode() {
-        return PullToRefreshBase.Mode.DISABLED;
-    }
-
-    // ------------------------ INTERFACE METHODS ------------------------
-
-
-    // --------------------- Interface OnRefreshListener2 ---------------------
-
-    @Override
-    public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) {
-    }
-
-    @Override
-    public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) {
-    }
-
-    // --------------------- Interface OnScrollListener ---------------------
-
-    @Override
-    public void onScrollStateChanged(AbsListView absListView, int scrollState) {
-        T adapter = getAdapter();
-        if (scrollState != SCROLL_STATE_TOUCH_SCROLL &&
-                absListView.getFirstVisiblePosition() == 0 && (absListView.getChildAt(0) == null || absListView.getChildAt(0).getTop() == 0)) {
-            adapter.setNotifiable(true);
-            updateListViewWithNotice(absListView, true);
-        } else {
-            adapter.setNotifiable(false);
-        }
-    }
-
-    @Override
-    public void onScroll(AbsListView absListView, int i, int i2, int i3) {
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-        View page = inflater.inflate(R.layout.fragment_list, container, false);
-        PullToRefreshListView listView = getListView(page);
-        listView.setAdapter(getAdapter());
-        listView.setOnScrollListener(this);
-        listView.setOnRefreshListener(this);
-        listView.setMode(getRefreshMode());
-        return page;
-    }
-
-    protected PullToRefreshListView getListView(View page) {
-        return (PullToRefreshListView) page.findViewById(R.id.fragment_list_listview);
-    }
-
-    protected void updateListViewWithNotice(AbsListView absListView, boolean addedToTop) {
-        T adapter = getAdapter();
-        int before = adapter.getCount();
-        adapter.notifyDataSetChanged(); // synchronized call (not adapter#updateForce())
-        int after = adapter.getCount();
-        int increments = after - before;
-        if (increments > 0) {
-            if (addedToTop) {
-                absListView.setSelection(increments + 1);
-                absListView.smoothScrollToPositionFromTop(increments, 0);
-                absListView.setSelection(increments);
-            } else {
-                absListView.smoothScrollToPositionFromTop(before, 0);
-            }
-
-            if (increments > 1) {
-                adapter.setNotifiable(false);
-            }
-        }
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/CustomListFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/CustomListFragment.kt
new file mode 100644
index 00000000..d8536263
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/CustomListFragment.kt
@@ -0,0 +1,107 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.AbsListView
+import android.widget.ListView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import com.handmark.pulltorefresh.library.PullToRefreshListView
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.World
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.view.adapter.CustomListAdapter
+
+abstract class CustomListFragment<T : CustomListAdapter<*>> : PageFragment<T>(), AbsListView.OnScrollListener, PullToRefreshBase.OnRefreshListener2<ListView> {
+
+    // --------------------- GETTER / SETTER METHODS ---------------------
+
+    protected open val refreshMode: PullToRefreshBase.Mode
+        get() = PullToRefreshBase.Mode.DISABLED
+
+    // ------------------------ INTERFACE METHODS ------------------------
+
+
+    // --------------------- Interface OnRefreshListener2 ---------------------
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {}
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {}
+
+    // --------------------- Interface OnScrollListener ---------------------
+
+    override fun onScrollStateChanged(absListView: AbsListView, scrollState: Int) {
+        val adapter = adapter
+        if (scrollState != AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL &&
+                absListView.firstVisiblePosition == 0 && (absListView.getChildAt(0) == null || absListView.getChildAt(0).top == 0)) {
+            adapter.setNotifiable(true)
+            updateListViewWithNotice(absListView, true)
+        } else {
+            adapter.setNotifiable(false)
+        }
+    }
+
+    override fun onScroll(absListView: AbsListView, i: Int, i2: Int, i3: Int) {}
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup, savedInstanceState: Bundle?): View {
+        val page = inflater.inflate(R.layout.fragment_list, container, false)
+        val listView = getListView(page)
+        listView.setAdapter(adapter)
+        listView.setOnScrollListener(this)
+        listView.setOnRefreshListener(this)
+        listView.mode = refreshMode
+        return page
+    }
+
+    protected open fun getListView(page: View): PullToRefreshListView {
+        return page.findViewById(R.id.fragment_list_listview) as PullToRefreshListView
+    }
+
+    protected fun updateListViewWithNotice(absListView: AbsListView, addedToTop: Boolean) {
+        val adapter = adapter
+        val before = adapter.count
+        adapter.notifyDataSetChanged() // synchronized call (not adapter#updateForce())
+        val after = adapter.count
+        val increments = after - before
+        if (increments > 0) {
+            if (addedToTop) {
+                absListView.setSelection(increments + 1)
+                absListView.smoothScrollToPositionFromTop(increments, 0)
+                absListView.setSelection(increments)
+            } else {
+                absListView.smoothScrollToPositionFromTop(before, 0)
+            }
+
+            if (increments > 1) {
+                adapter.setNotifiable(false)
+            }
+        }
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/adapter/MessageListAdapter.java b/app/src/main/java/net/lacolaco/smileessence/view/page/HistoryFragment.kt
index 9f8e5039..70cae02f 100644
--- a/app/src/main/java/net/lacolaco/smileessence/view/adapter/MessageListAdapter.java
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/HistoryFragment.kt
@@ -22,32 +22,20 @@
  * SOFTWARE.
  */
 
-package net.lacolaco.smileessence.view.adapter;
+package net.lacolaco.smileessence.view.page
 
-import android.app.Activity;
-import android.view.View;
-import android.view.ViewGroup;
-import net.lacolaco.smileessence.entity.DirectMessage;
-import net.lacolaco.smileessence.view.Partials;
+import android.os.Bundle
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import net.lacolaco.smileessence.World
+import net.lacolaco.smileessence.view.adapter.EventListAdapter
 
-public class MessageListAdapter extends OrderedCustomListAdapter<DirectMessage> {
-    private final Activity activity;
+class HistoryFragment : CustomListFragment<EventListAdapter>() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
 
-    public MessageListAdapter(Activity activity) {
-        super();
-        this.activity = activity;
+        adapter = EventListAdapter(world, activity)
+        world.addEventNotifier(this) { adapter.update() } // XXX
     }
 
-    public long getLastID() {
-        return getCount() > 0 ? getItem(getCount() - 1).getId() : -1;
-    }
-
-    public long getTopID() {
-        return getCount() > 0 ? getItem(0).getId() : -1;
-    }
-
-    @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
-        return Partials.getDirectMessageView(getItem(position), activity, convertView);
-    }
+    override fun refresh() {}
 }
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/HomeFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/HomeFragment.java
deleted file mode 100644
index e00f69c6..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/HomeFragment.java
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.os.Bundle;
-import android.widget.ListView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.logging.Logger;
-import net.lacolaco.smileessence.twitter.task.TimelineTask;
-import net.lacolaco.smileessence.twitter.task.Timelines;
-import net.lacolaco.smileessence.util.UIHandler;
-import net.lacolaco.smileessence.view.adapter.TimelineAdapter;
-
-public class HomeFragment extends CustomListFragment<TimelineAdapter> {
-    @Override
-    protected PullToRefreshBase.Mode getRefreshMode() {
-        return PullToRefreshBase.Mode.BOTH;
-    }
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        TimelineAdapter adapter = new TimelineAdapter(getActivity());
-        setAdapter(adapter);
-
-        getWorld().addTimeline(this, tweet -> {
-            adapter.add(tweet);
-            adapter.update();
-        });
-
-        refresh();
-    }
-
-    @Override
-    public void refresh() {
-        runRefreshTask(new Timelines.HomeTimelineTask(getWorld().getAccount()), () -> getAdapter().updateForce());
-    }
-
-    // --------------------- Interface OnRefreshListener2 ---------------------
-
-    @Override
-    public void onPullDownToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        if (getWorld().isStreaming()) {
-            new UIHandler().post(() -> {
-                updateListViewWithNotice(refreshView.getRefreshableView(), true);
-                refreshView.onRefreshComplete();
-            });
-        } else {
-            runRefreshTask(
-                    new Timelines.HomeTimelineTask(getWorld().getAccount())
-                            .setSinceId(getAdapter().getTopID()),
-                    () -> {
-                        updateListViewWithNotice(refreshView.getRefreshableView(), true);
-                        refreshView.onRefreshComplete();
-                    });
-        }
-    }
-
-    @Override
-    public void onPullUpToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        runRefreshTask(
-                new Timelines.HomeTimelineTask(getWorld().getAccount())
-                        .setMaxId(getAdapter().getLastID() - 1),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), false);
-                    refreshView.onRefreshComplete();
-                });
-    }
-
-    private void runRefreshTask(TimelineTask<Tweet> task, Runnable onFinish) {
-        task
-                .setCount(200)
-                .onFail(e -> getWorld().notifyError(R.string.notice_error_get_home))
-                .onDoneUI(tweets -> getWorld().addTweetAll(tweets))
-                .onFinishUI(onFinish)
-                .execute();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/HomeFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/HomeFragment.kt
new file mode 100644
index 00000000..a9bd8fe4
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/HomeFragment.kt
@@ -0,0 +1,97 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.os.Bundle
+import android.widget.ListView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.logging.Logger
+import net.lacolaco.smileessence.twitter.task.TimelineTask
+import net.lacolaco.smileessence.twitter.task.Timelines
+import net.lacolaco.smileessence.util.UIHandler
+import net.lacolaco.smileessence.view.adapter.TimelineAdapter
+
+class HomeFragment : CustomListFragment<TimelineAdapter>() {
+    override val refreshMode: PullToRefreshBase.Mode
+        get() = PullToRefreshBase.Mode.BOTH
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        adapter = TimelineAdapter(activity)
+
+        world.addTimeline(this) { tweet ->
+            adapter.add(tweet)
+            adapter.update()
+        }
+
+        refresh()
+    }
+
+    override fun refresh() {
+        runRefreshTask(Timelines.HomeTimelineTask(world.account), { adapter.updateForce() })
+    }
+
+    // --------------------- Interface OnRefreshListener2 ---------------------
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        if (world.isStreaming) {
+            UIHandler().post {
+                updateListViewWithNotice(refreshView.refreshableView, true)
+                refreshView.onRefreshComplete()
+            }
+        } else {
+            runRefreshTask(
+                    Timelines.HomeTimelineTask(world.account)
+                            .setSinceId(adapter.topID),
+                    {
+                        updateListViewWithNotice(refreshView.refreshableView, true)
+                        refreshView.onRefreshComplete()
+                    })
+        }
+    }
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        runRefreshTask(
+                Timelines.HomeTimelineTask(world.account)
+                        .setMaxId(adapter.lastID - 1),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, false)
+                    refreshView.onRefreshComplete()
+                })
+    }
+
+    private fun runRefreshTask(task: TimelineTask<Tweet>, onFinish: () -> Unit) {
+        task
+                .setCount(200)
+                .onFail { e -> world.notifyError(R.string.notice_error_get_home) }
+                .onDoneUI { tweets -> world.addTweetAll(tweets) }
+                .onFinishUI(onFinish)
+                .execute()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/MentionsFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/MentionsFragment.java
deleted file mode 100644
index 21ae1169..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/MentionsFragment.java
+++ /dev/null
@@ -1,112 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.os.Bundle;
-import android.widget.ListView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.data.ExtractionWord;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.entity.User;
-import net.lacolaco.smileessence.twitter.task.TimelineTask;
-import net.lacolaco.smileessence.twitter.task.Timelines;
-import net.lacolaco.smileessence.view.adapter.TimelineAdapter;
-
-public class MentionsFragment extends CustomListFragment<TimelineAdapter> {
-
-    // --------------------- GETTER / SETTER METHODS ---------------------
-
-    @Override
-    protected PullToRefreshBase.Mode getRefreshMode() {
-        return PullToRefreshBase.Mode.BOTH;
-    }
-
-    // ------------------------ INTERFACE METHODS ------------------------
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-
-        final TimelineAdapter adapter = new TimelineAdapter(getActivity());
-        setAdapter(adapter);
-
-        // Prevent calling getWorld() on null
-        final User self = getWorld().getAccount().getUser();
-        getWorld().addTimeline(this, tweet -> {
-            if (tweet.getMentions().contains(self.getScreenName())) {
-                adapter.add(tweet);
-                adapter.update();
-            } else {
-                for (ExtractionWord word : ExtractionWord.cached()) {
-                    if (word.getPattern().matcher(tweet.getOriginalTweet().getText()).find()) {
-                        adapter.add(tweet);
-                        adapter.update();
-                    }
-                }
-            }
-        });
-
-        refresh();
-    }
-
-    @Override
-    public void refresh() {
-        runRefreshTask(new Timelines.MentionsTimelineTask(getWorld().getAccount()), () -> getAdapter().updateForce());
-    }
-
-    // --------------------- Interface OnRefreshListener2 ---------------------
-
-    @Override
-    public void onPullDownToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        runRefreshTask(
-                new Timelines.MentionsTimelineTask(getWorld().getAccount())
-                        .setSinceId(getAdapter().getTopID()),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), true);
-                    refreshView.onRefreshComplete();
-                });
-    }
-
-    @Override
-    public void onPullUpToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        runRefreshTask(
-                new Timelines.MentionsTimelineTask(getWorld().getAccount())
-                        .setMaxId(getAdapter().getLastID() - 1),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), false);
-                    refreshView.onRefreshComplete();
-                });
-    }
-
-    private void runRefreshTask(TimelineTask<Tweet> task, Runnable onFinish) {
-        task
-                .setCount(200)
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_get_mentions))
-                .onDoneUI(tweets -> getWorld().addTweetAll(tweets))
-                .onFinishUI(onFinish)
-                .execute();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/MentionsFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/MentionsFragment.kt
new file mode 100644
index 00000000..d8442ac7
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/MentionsFragment.kt
@@ -0,0 +1,102 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.os.Bundle
+import android.widget.ListView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.data.ExtractionWord
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.entity.User
+import net.lacolaco.smileessence.twitter.task.TimelineTask
+import net.lacolaco.smileessence.twitter.task.Timelines
+import net.lacolaco.smileessence.view.adapter.TimelineAdapter
+
+class MentionsFragment : CustomListFragment<TimelineAdapter>() {
+    override val refreshMode: PullToRefreshBase.Mode
+        get() = PullToRefreshBase.Mode.BOTH
+
+    // ------------------------ INTERFACE METHODS ------------------------
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        adapter = TimelineAdapter(activity)
+
+        // Prevent calling getWorld() on null
+        val self = world.account.user
+        world.addTimeline(this) { tweet ->
+            if (tweet.mentions.contains(self.screenName)) {
+                adapter.add(tweet)
+                adapter.update()
+            } else {
+                for (word in ExtractionWord.cached()) {
+                    if (word.pattern.matcher(tweet.originalTweet.text).find()) {
+                        adapter.add(tweet)
+                        adapter.update()
+                    }
+                }
+            }
+        }
+
+        refresh()
+    }
+
+    override fun refresh() {
+        runRefreshTask(Timelines.MentionsTimelineTask(world.account), { adapter.updateForce() })
+    }
+
+    // --------------------- Interface OnRefreshListener2 ---------------------
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        runRefreshTask(
+                Timelines.MentionsTimelineTask(world.account)
+                        .setSinceId(adapter.topID),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, true)
+                    refreshView.onRefreshComplete()
+                })
+    }
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        runRefreshTask(
+                Timelines.MentionsTimelineTask(world.account)
+                        .setMaxId(adapter.lastID - 1),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, false)
+                    refreshView.onRefreshComplete()
+                })
+    }
+
+    private fun runRefreshTask(task: TimelineTask<Tweet>, onFinish: () -> Unit) {
+        task
+                .setCount(200)
+                .onFail { x -> world.notifyError(R.string.notice_error_get_mentions) }
+                .onDoneUI { tweets -> world.addTweetAll(tweets) }
+                .onFinishUI(onFinish)
+                .execute()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/MessagesFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/MessagesFragment.java
deleted file mode 100644
index 291f4cfc..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/MessagesFragment.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.os.Bundle;
-import android.widget.ListView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.entity.DirectMessage;
-import net.lacolaco.smileessence.twitter.task.Messages;
-import net.lacolaco.smileessence.twitter.task.TimelineTask;
-import net.lacolaco.smileessence.view.adapter.MessageListAdapter;
-
-public class MessagesFragment extends CustomListFragment<MessageListAdapter> {
-    @Override
-    protected PullToRefreshBase.Mode getRefreshMode() {
-        return PullToRefreshBase.Mode.BOTH;
-    }
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        MessageListAdapter adapter = new MessageListAdapter(getActivity());
-        setAdapter(adapter);
-
-        getWorld().addDirectMessageTimeline(this, message -> {
-            adapter.add(message);
-            adapter.update();
-        });
-
-        refresh();
-    }
-
-    @Override
-    public void refresh() {
-        runRefreshTask(new Messages.GetAllReceived(getWorld().getAccount()), () -> getAdapter().updateForce());
-        runRefreshTask(new Messages.GetAllSent(getWorld().getAccount()), () -> getAdapter().updateForce());
-    }
-
-    @Override
-    public void onPullDownToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        runRefreshTask(
-                new Messages.GetAllReceived(getWorld().getAccount())
-                        .setSinceId(getAdapter().getTopID()),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), true);
-                    refreshView.onRefreshComplete();
-                }); // TODO: sent?
-    }
-
-    @Override
-    public void onPullUpToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        runRefreshTask(
-                new Messages.GetAllReceived(getWorld().getAccount())
-                        .setMaxId(getAdapter().getLastID() - 1),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), false);
-                    refreshView.onRefreshComplete();
-                }); // TODO: sent?
-    }
-
-    private void runRefreshTask(TimelineTask<DirectMessage> task, Runnable onFinish) {
-        task
-                .setCount(200)
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_get_messages))
-                .onDoneUI(messages -> {
-                    for (DirectMessage message : messages) {
-                        getWorld().addDirectMessage(message);
-                    }
-                })
-                .onFinishUI(onFinish)
-                .execute();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/MessagesFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/MessagesFragment.kt
new file mode 100644
index 00000000..ea756d09
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/MessagesFragment.kt
@@ -0,0 +1,90 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.os.Bundle
+import android.widget.ListView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.entity.DirectMessage
+import net.lacolaco.smileessence.twitter.task.Messages
+import net.lacolaco.smileessence.twitter.task.TimelineTask
+import net.lacolaco.smileessence.view.adapter.MessageListAdapter
+
+class MessagesFragment : CustomListFragment<MessageListAdapter>() {
+    override val refreshMode: PullToRefreshBase.Mode
+        get() = PullToRefreshBase.Mode.BOTH
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        adapter = MessageListAdapter(activity)
+
+        world.addDirectMessageTimeline(this) { message ->
+            adapter.add(message)
+            adapter.update()
+        }
+
+        refresh()
+    }
+
+    override fun refresh() {
+        runRefreshTask(Messages.GetAllReceived(world.account), { adapter.updateForce() })
+        runRefreshTask(Messages.GetAllSent(world.account), { adapter.updateForce() })
+    }
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        runRefreshTask(
+                Messages.GetAllReceived(world.account)
+                        .setSinceId(adapter.topID),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, true)
+                    refreshView.onRefreshComplete()
+                }) // TODO: sent?
+    }
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        runRefreshTask(
+                Messages.GetAllReceived(world.account)
+                        .setMaxId(adapter.lastID - 1),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, false)
+                    refreshView.onRefreshComplete()
+                }) // TODO: sent?
+    }
+
+    private fun runRefreshTask(task: TimelineTask<DirectMessage>, onFinish: () -> Unit) {
+        task
+                .setCount(200)
+                .onFail { x -> world.notifyError(R.string.notice_error_get_messages) }
+                .onDoneUI { messages ->
+                    for (message in messages) {
+                        world.addDirectMessage(message)
+                    }
+                }
+                .onFinishUI(onFinish)
+                .execute()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/PageFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/PageFragment.java
deleted file mode 100644
index c1299298..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/PageFragment.java
+++ /dev/null
@@ -1,32 +0,0 @@
-package net.lacolaco.smileessence.view.page;
-
-import android.app.Fragment;
-import android.os.Bundle;
-import android.widget.Adapter;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.World;
-import net.lacolaco.smileessence.activity.MainActivity;
-
-public abstract class PageFragment<T extends Adapter> extends Fragment {
-    public static final String KEY_USER_ID = "KEY_USER_ID";
-    private T adapter;
-    private World world;
-
-    protected final T getAdapter() {
-        if (adapter == null) throw new IllegalStateException("adapter is not initialized");
-        return adapter;
-    }
-
-    protected final void setAdapter(T _adapter) {
-        adapter = _adapter;
-    }
-
-    public abstract void refresh();
-
-    protected final World getWorld() {
-        if (world == null) {
-            world = Application.getWorld(getArguments().getLong(KEY_USER_ID));
-        }
-        return world;
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/PageFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/PageFragment.kt
new file mode 100644
index 00000000..596f4107
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/PageFragment.kt
@@ -0,0 +1,25 @@
+package net.lacolaco.smileessence.view.page
+
+import android.app.Fragment
+import android.os.Bundle
+import android.widget.Adapter
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.World
+import net.lacolaco.smileessence.activity.MainActivity
+
+abstract class PageFragment<T : Adapter> : Fragment() {
+    private var _adapter: T? = null
+    protected var adapter: T
+        get() = _adapter ?: throw IllegalStateException("adapter is not initialized")
+        set(value) { _adapter = value }
+
+    protected val world: World by lazy {
+        Application.getWorld(arguments.getLong(KEY_USER_ID))
+    }
+
+    abstract fun refresh()
+
+    companion object {
+        val KEY_USER_ID = "KEY_USER_ID"
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/PostFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/PostFragment.java
deleted file mode 100644
index c8426383..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/PostFragment.java
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.content.Intent;
-import android.net.Uri;
-import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.v4.content.ContextCompat;
-import android.text.Editable;
-import android.text.Spannable;
-import android.text.TextUtils;
-import android.text.TextWatcher;
-import android.text.method.ArrowKeyMovementMethod;
-import android.view.*;
-import android.widget.*;
-import com.twitter.Validator;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.World;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.data.PostState;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.logging.Logger;
-import net.lacolaco.smileessence.preference.UserPreferenceHelper;
-import net.lacolaco.smileessence.twitter.task.Tweets;
-import net.lacolaco.smileessence.util.BitmapThumbnailTask;
-import net.lacolaco.smileessence.util.IntentUtils;
-import net.lacolaco.smileessence.util.SystemServiceHelper;
-import net.lacolaco.smileessence.util.UIHandler;
-import net.lacolaco.smileessence.view.Partials;
-
-import java.io.File;
-
-public class PostFragment extends PageFragment implements TextWatcher, View.OnFocusChangeListener, View.OnClickListener,
-        PostState.OnPostStateChangeListener {
-    // ------------------------------ FIELDS ------------------------------
-
-    private EditText editText;
-    private TextView textViewCount;
-    private Button buttonTweet;
-    private ViewGroup viewGroupReply;
-    private ViewGroup viewGroupMedia;
-
-    @Override
-    public void refresh() {
-    }
-
-    // --------------------- Interface OnClickListener ---------------------
-
-    @Override
-    public void onClick(View v) {
-        switch (v.getId()) {
-            case R.id.button_post_delete: {
-                deletePost();
-                break;
-            }
-            case R.id.button_post_media: {
-                setImage();
-                break;
-            }
-            case R.id.button_post_tweet: {
-                submitPost();
-                break;
-            }
-            case R.id.button_post_reply_delete: {
-                deleteReply();
-                break;
-            }
-            case R.id.button_post_media_delete: {
-                removeImage();
-                break;
-            }
-            case R.id.image_post_media: {
-                displayImage();
-                break;
-            }
-        }
-    }
-
-    // --------------------- Interface OnFocusChangeListener ---------------------
-
-    @Override
-    public void onFocusChange(View v, boolean hasFocus) {
-        if (hasFocus) {
-            SystemServiceHelper.showIM(getActivity(), editText);
-        } else {
-            SystemServiceHelper.hideIM(getActivity(), editText);
-        }
-    }
-
-    // --------------------- Interface OnPostStateChangeListener ---------------------
-
-
-    @Override
-    public void onPostStateChange(final PostState postState) {
-        Logger.debug("onPostStateChange");
-        final MainActivity activity = (MainActivity) getActivity();
-        if (editText != null) {
-            final int start = postState.getSelectionStart();
-            final int end = postState.getSelectionEnd();
-            editText.removeTextChangedListener(this);
-            editText.setTextKeepState(postState.getText());
-            editText.addTextChangedListener(this);
-            updateTextCount(editText.getText());
-            new UIHandler().postAtFrontOfQueue(() -> editText.setSelection(start, end));
-        }
-        if (viewGroupReply != null) {
-            if (postState.getInReplyTo() != null) {
-                viewGroupReply.setVisibility(View.VISIBLE);
-                ImageButton imageButtonDeleteReply = (ImageButton) viewGroupReply.findViewById(R.id.button_post_reply_delete);
-                imageButtonDeleteReply.setOnClickListener(this);
-
-                Tweet tweet = postState.getInReplyTo();
-                View header = viewGroupReply.findViewById(R.id.layout_post_reply_status);
-                header = Partials.getTweetView(tweet, activity, header, true);
-                header.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.transparent));
-                header.setClickable(false);
-            } else {
-                viewGroupReply.setVisibility(View.GONE);
-            }
-        }
-        if (viewGroupMedia != null) {
-            ImageView imageViewMedia = (ImageView) viewGroupMedia.findViewById(R.id.image_post_media);
-            if (TextUtils.isEmpty(postState.getMediaFilePath())) {
-                viewGroupMedia.setVisibility(View.GONE);
-            } else {
-                viewGroupMedia.setVisibility(View.VISIBLE);
-
-            }
-            new BitmapThumbnailTask(postState.getMediaFilePath(), imageViewMedia).execute();
-        }
-    }
-
-    // --------------------- Interface TextWatcher ---------------------
-
-    @Override
-    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
-    }
-
-    @Override
-    public void onTextChanged(CharSequence s, int start, int before, int count) {
-        updateTextCount(s);
-    }
-
-    private void updateTextCount(CharSequence s) {
-        Validator validator = new Validator();
-        int remainingCount = 140 - validator.getTweetLength(s.toString());
-        if (!TextUtils.isEmpty(getWorld().getPostState().getMediaFilePath())) {
-            remainingCount -= validator.getShortUrlLength();
-        }
-        textViewCount.setText(String.valueOf(remainingCount));
-        if (remainingCount == 140 || remainingCount < 0) {
-            textViewCount.setTextColor(ContextCompat.getColor(getActivity(), R.color.red));
-        } else {
-            textViewCount.setTextAppearance(getActivity(), android.R.style.TextAppearance_Widget_TextView);
-        }
-        setStateFromView();
-    }
-
-    @Override
-    public void afterTextChanged(Editable s) {
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        Logger.debug("onCreate");
-        super.onCreate(savedInstanceState);
-        setHasOptionsMenu(true);
-    }
-
-    @Override
-    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
-        super.onCreateOptionsMenu(menu, inflater);
-        SystemServiceHelper.showIM(getActivity(), editText);
-    }
-
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-        Logger.debug("onCreateView");
-        getWorld().getPostState().setListener(this);
-        View v = inflater.inflate(R.layout.fragment_post, null);
-        buttonTweet = getTweetButton(v);
-        buttonTweet.setOnClickListener(this);
-        editText = getEditText(v);
-        textViewCount = getCountTextView(v);
-        int textSize = UserPreferenceHelper.getInstance().getTextSize();
-        editText.addTextChangedListener(this);
-        editText.setOnFocusChangeListener(this);
-        editText.setTextSize(textSize + 4);
-        editText.setMovementMethod(new ArrowKeyMovementMethod() {
-            @Override
-            protected boolean right(@NonNull TextView widget, Spannable buffer) {
-                //Don't back to Home
-                return widget.getSelectionEnd() == widget.length() || super.right(widget, buffer);
-            }
-        });
-        ImageButton imageButtonDeleteText = (ImageButton) v.findViewById(R.id.button_post_delete);
-        imageButtonDeleteText.setOnClickListener(this);
-        ImageButton imageButtonMedia = (ImageButton) v.findViewById(R.id.button_post_media);
-        imageButtonMedia.setOnClickListener(this);
-        //Reply view
-        viewGroupReply = getReplyViewGroup(v);
-        ImageButton imageButtonDeleteReply = (ImageButton) viewGroupReply.findViewById(R.id.button_post_reply_delete);
-        imageButtonDeleteReply.setOnClickListener(this);
-        //Media view
-        viewGroupMedia = getMediaViewGroup(v);
-        ImageView imageViewMedia = (ImageView) viewGroupMedia.findViewById(R.id.image_post_media);
-        ImageButton imageButtonDeleteMedia = (ImageButton) viewGroupMedia.findViewById(R.id.button_post_media_delete);
-        imageViewMedia.setOnClickListener(this);
-        imageButtonDeleteMedia.setOnClickListener(this);
-        editText.requestFocus();
-        return v;
-    }
-
-    @Override
-    public void onDestroyView() {
-        Logger.debug("onDestroyView");
-        super.onDestroyView();
-        setStateFromView();
-        getWorld().getPostState().removeListener();
-    }
-
-    @Override
-    public void onViewStateRestored(Bundle savedInstanceState) {
-        Logger.debug("onViewStateRestored");
-        super.onViewStateRestored(savedInstanceState);
-        PostState state = getWorld().getPostState();
-        onPostStateChange(state);
-    }
-
-    private void deletePost() {
-        editText.setText("");
-        getWorld().getPostState().beginTransaction().setText("").setCursor(0).commit();
-        deleteReply();
-    }
-
-    private void deleteReply() {
-        viewGroupReply.setVisibility(View.GONE);
-        getWorld().getPostState().beginTransaction().setInReplyTo(null).commit();
-    }
-
-    private void displayImage() {
-        Intent intent = new Intent();
-        intent.setAction(Intent.ACTION_VIEW);
-        intent.addCategory(Intent.CATEGORY_DEFAULT);
-        intent.setDataAndType(Uri.fromFile(new File(getWorld().getPostState().getMediaFilePath())), "image/*");
-        IntentUtils.startActivityIfFound(getActivity(), intent);
-    }
-
-    private TextView getCountTextView(View v) {
-        return (TextView) v.findViewById(R.id.post_text_count);
-    }
-
-    private EditText getEditText(View v) {
-        return (EditText) v.findViewById(R.id.post_edit_text);
-    }
-
-    private ViewGroup getMediaViewGroup(View v) {
-        return (ViewGroup) v.findViewById(R.id.post_media_parent);
-    }
-
-    private ViewGroup getReplyViewGroup(View v) {
-        return (ViewGroup) v.findViewById(R.id.post_inreplyto_parent);
-    }
-
-    private Button getTweetButton(View v) {
-        return (Button) v.findViewById(R.id.button_post_tweet);
-    }
-
-    private void removeImage() {
-        SystemServiceHelper.hideIM(getActivity(), editText);
-        viewGroupMedia.setVisibility(View.GONE);
-        ((ImageView) viewGroupMedia.findViewById(R.id.image_post_media)).setImageBitmap(null);
-        getWorld().getPostState().beginTransaction().setMediaFilePath("").commit();
-    }
-
-    private void setImage() {
-        setStateFromView();
-        SystemServiceHelper.hideIM(getActivity(), editText);
-
-        Intent intent = new Intent(Intent.ACTION_PICK);
-        intent.setType("image/*");
-        IntentUtils.startActivityForResultIfFound(getActivity(), intent, MainActivity.REQUEST_GET_PICTURE_FROM_GALLERY);
-    }
-
-    private void setStateFromView() {
-        PostState state = getWorld().getPostState();
-        state.removeListener();
-        state.beginTransaction()
-                .setText(editText.getText().toString())
-                .setSelection(editText.getSelectionStart(), editText.getSelectionEnd())
-                .commit();
-        state.setListener(this);
-    }
-
-    private void submitPost() {
-        SystemServiceHelper.hideIM(getActivity(), editText);
-        setStateFromView();
-        PostState state = getWorld().getPostState();
-        MainActivity mainActivity = (MainActivity) getActivity();
-        boolean resizeFlag = UserPreferenceHelper.getInstance().get(R.string.key_setting_resize_post_image, false);
-        new Tweets.CreateTask(getWorld().getAccount(), state.toStatusUpdate(), state.getMediaFilePath(), resizeFlag)
-                .onDoneUI(t -> {
-                    getWorld().notify(R.string.notice_tweet_succeeded);
-                    getWorld().getPostState().beginTransaction().clear().commit();
-                })
-                .onFail(e -> getWorld().notifyError(R.string.notice_tweet_failed, e))
-                .execute();
-        mainActivity.openHomePage();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/PostFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/PostFragment.kt
new file mode 100644
index 00000000..8afeadd1
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/PostFragment.kt
@@ -0,0 +1,304 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.content.Intent
+import android.net.Uri
+import android.os.Bundle
+import android.support.v4.content.ContextCompat
+import android.text.Editable
+import android.text.Spannable
+import android.text.TextUtils
+import android.text.TextWatcher
+import android.text.method.ArrowKeyMovementMethod
+import android.view.*
+import android.widget.*
+import com.twitter.Validator
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.World
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.data.PostState
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.logging.Logger
+import net.lacolaco.smileessence.preference.UserPreferenceHelper
+import net.lacolaco.smileessence.twitter.task.Tweets
+import net.lacolaco.smileessence.util.BitmapThumbnailTask
+import net.lacolaco.smileessence.util.IntentUtils
+import net.lacolaco.smileessence.util.SystemServiceHelper
+import net.lacolaco.smileessence.util.UIHandler
+import net.lacolaco.smileessence.view.Partials
+
+import java.io.File
+
+class PostFragment : PageFragment<BaseAdapter>(), TextWatcher, View.OnFocusChangeListener, View.OnClickListener, PostState.OnPostStateChangeListener {
+    private var editText: EditText? = null
+    private var textViewCount: TextView? = null
+    private var buttonTweet: Button? = null
+    private var viewGroupReply: ViewGroup? = null
+    private var viewGroupMedia: ViewGroup? = null
+
+    override fun refresh() {}
+
+    // --------------------- Interface OnClickListener ---------------------
+
+    override fun onClick(v: View) {
+        when (v.id) {
+            R.id.button_post_delete -> {
+                deletePost()
+            }
+            R.id.button_post_media -> {
+                setImage()
+            }
+            R.id.button_post_tweet -> {
+                submitPost()
+            }
+            R.id.button_post_reply_delete -> {
+                deleteReply()
+            }
+            R.id.button_post_media_delete -> {
+                removeImage()
+            }
+            R.id.image_post_media -> {
+                displayImage()
+            }
+        }
+    }
+
+    // --------------------- Interface OnFocusChangeListener ---------------------
+
+    override fun onFocusChange(v: View, hasFocus: Boolean) {
+        if (hasFocus) {
+            SystemServiceHelper.showIM(activity, editText)
+        } else {
+            SystemServiceHelper.hideIM(activity, editText)
+        }
+    }
+
+    // --------------------- Interface OnPostStateChangeListener ---------------------
+
+
+    override fun onPostStateChange(postState: PostState) {
+        Logger.debug("onPostStateChange")
+        val activity = activity as MainActivity
+        if (editText != null) {
+            val start = postState.selectionStart
+            val end = postState.selectionEnd
+            editText!!.removeTextChangedListener(this)
+            editText!!.setTextKeepState(postState.text)
+            editText!!.addTextChangedListener(this)
+            updateTextCount(editText!!.text)
+            UIHandler().postAtFrontOfQueue { editText!!.setSelection(start, end) }
+        }
+        if (viewGroupReply != null) {
+            if (postState.inReplyTo != null) {
+                viewGroupReply!!.visibility = View.VISIBLE
+                val imageButtonDeleteReply = viewGroupReply!!.findViewById(R.id.button_post_reply_delete) as ImageButton
+                imageButtonDeleteReply.setOnClickListener(this)
+
+                val tweet = postState.inReplyTo
+                var header = viewGroupReply!!.findViewById(R.id.layout_post_reply_status)
+                header = Partials.getTweetView(tweet!!, activity, header, true)
+                header.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.transparent))
+                header.isClickable = false
+            } else {
+                viewGroupReply!!.visibility = View.GONE
+            }
+        }
+        if (viewGroupMedia != null) {
+            val imageViewMedia = viewGroupMedia!!.findViewById(R.id.image_post_media) as ImageView
+            if (TextUtils.isEmpty(postState.mediaFilePath)) {
+                viewGroupMedia!!.visibility = View.GONE
+            } else {
+                viewGroupMedia!!.visibility = View.VISIBLE
+
+            }
+            BitmapThumbnailTask(postState.mediaFilePath, imageViewMedia).execute()
+        }
+    }
+
+    // --------------------- Interface TextWatcher ---------------------
+
+    override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {}
+
+    override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
+        updateTextCount(s)
+    }
+
+    private fun updateTextCount(s: CharSequence) {
+        val validator = Validator()
+        var remainingCount = 140 - validator.getTweetLength(s.toString())
+        if (!TextUtils.isEmpty(world.postState.mediaFilePath)) {
+            remainingCount -= validator.shortUrlLength
+        }
+        textViewCount!!.text = remainingCount.toString()
+        if (remainingCount == 140 || remainingCount < 0) {
+            textViewCount!!.setTextColor(ContextCompat.getColor(activity, R.color.red))
+        } else {
+            textViewCount!!.setTextAppearance(activity, android.R.style.TextAppearance_Widget_TextView)
+        }
+        setStateFromView()
+    }
+
+    override fun afterTextChanged(s: Editable) {}
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        super.onCreateOptionsMenu(menu, inflater)
+        SystemServiceHelper.showIM(activity, editText)
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+        Logger.debug("onCreateView")
+        setHasOptionsMenu(true)
+        world.postState.setListener(this)
+        val v = inflater.inflate(R.layout.fragment_post, container, false)
+        buttonTweet = getTweetButton(v)
+        buttonTweet!!.setOnClickListener(this)
+        editText = getEditText(v)
+        textViewCount = getCountTextView(v)
+        val textSize = UserPreferenceHelper.instance.textSize
+        editText!!.addTextChangedListener(this)
+        editText!!.onFocusChangeListener = this
+        editText!!.textSize = (textSize + 4).toFloat()
+        editText!!.movementMethod = object : ArrowKeyMovementMethod() {
+            override fun right(widget: TextView, buffer: Spannable): Boolean {
+                //Don't back to Home
+                return widget.selectionEnd == widget.length() || super.right(widget, buffer)
+            }
+        }
+        val imageButtonDeleteText = v.findViewById(R.id.button_post_delete) as ImageButton
+        imageButtonDeleteText.setOnClickListener(this)
+        val imageButtonMedia = v.findViewById(R.id.button_post_media) as ImageButton
+        imageButtonMedia.setOnClickListener(this)
+        //Reply view
+        viewGroupReply = getReplyViewGroup(v)
+        val imageButtonDeleteReply = viewGroupReply!!.findViewById(R.id.button_post_reply_delete) as ImageButton
+        imageButtonDeleteReply.setOnClickListener(this)
+        //Media view
+        viewGroupMedia = getMediaViewGroup(v)
+        val imageViewMedia = viewGroupMedia!!.findViewById(R.id.image_post_media) as ImageView
+        val imageButtonDeleteMedia = viewGroupMedia!!.findViewById(R.id.button_post_media_delete) as ImageButton
+        imageViewMedia.setOnClickListener(this)
+        imageButtonDeleteMedia.setOnClickListener(this)
+        editText!!.requestFocus()
+        return v
+    }
+
+    override fun onDestroyView() {
+        Logger.debug("onDestroyView")
+        super.onDestroyView()
+        setStateFromView()
+        world.postState.removeListener()
+    }
+
+    override fun onViewStateRestored(savedInstanceState: Bundle?) {
+        Logger.debug("onViewStateRestored")
+        super.onViewStateRestored(savedInstanceState)
+        val state = world.postState
+        onPostStateChange(state)
+    }
+
+    private fun deletePost() {
+        editText!!.setText("")
+        world.postState.beginTransaction().setText("").setCursor(0).commit()
+        deleteReply()
+    }
+
+    private fun deleteReply() {
+        viewGroupReply!!.visibility = View.GONE
+        world.postState.beginTransaction().setInReplyTo(null).commit()
+    }
+
+    private fun displayImage() {
+        val intent = Intent()
+        intent.action = Intent.ACTION_VIEW
+        intent.addCategory(Intent.CATEGORY_DEFAULT)
+        intent.setDataAndType(Uri.fromFile(File(world.postState.mediaFilePath)), "image/*")
+        IntentUtils.startActivityIfFound(activity, intent)
+    }
+
+    private fun getCountTextView(v: View): TextView {
+        return v.findViewById(R.id.post_text_count) as TextView
+    }
+
+    private fun getEditText(v: View): EditText {
+        return v.findViewById(R.id.post_edit_text) as EditText
+    }
+
+    private fun getMediaViewGroup(v: View): ViewGroup {
+        return v.findViewById(R.id.post_media_parent) as ViewGroup
+    }
+
+    private fun getReplyViewGroup(v: View): ViewGroup {
+        return v.findViewById(R.id.post_inreplyto_parent) as ViewGroup
+    }
+
+    private fun getTweetButton(v: View): Button {
+        return v.findViewById(R.id.button_post_tweet) as Button
+    }
+
+    private fun removeImage() {
+        SystemServiceHelper.hideIM(activity, editText)
+        viewGroupMedia!!.visibility = View.GONE
+        (viewGroupMedia!!.findViewById(R.id.image_post_media) as ImageView).setImageBitmap(null)
+        world.postState.beginTransaction().setMediaFilePath("").commit()
+    }
+
+    private fun setImage() {
+        setStateFromView()
+        SystemServiceHelper.hideIM(activity, editText)
+
+        val intent = Intent(Intent.ACTION_PICK)
+        intent.type = "image/*"
+        IntentUtils.startActivityForResultIfFound(activity, intent, MainActivity.REQUEST_GET_PICTURE_FROM_GALLERY)
+    }
+
+    private fun setStateFromView() {
+        val state = world.postState
+        state.removeListener()
+        state.beginTransaction()
+                .setText(editText!!.text.toString())
+                .setSelection(editText!!.selectionStart, editText!!.selectionEnd)
+                .commit()
+        state.setListener(this)
+    }
+
+    private fun submitPost() {
+        SystemServiceHelper.hideIM(activity, editText)
+        setStateFromView()
+        val state = world.postState
+        val mainActivity = activity as MainActivity
+        val resizeFlag = UserPreferenceHelper.instance.get(R.string.key_setting_resize_post_image, false)
+        Tweets.CreateTask(world.account, state.toStatusUpdate(), state.mediaFilePath, resizeFlag)
+                .onDoneUI { t ->
+                    world.notify(R.string.notice_tweet_succeeded)
+                    world.postState.beginTransaction().clear().commit()
+                }
+                .onFail { e -> world.notifyError(R.string.notice_tweet_failed, e) }
+                .execute()
+        mainActivity.openHomePage()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/SearchFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/SearchFragment.java
deleted file mode 100644
index 84d10c21..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/SearchFragment.java
+++ /dev/null
@@ -1,321 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.app.AlertDialog;
-import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.text.Spannable;
-import android.text.TextUtils;
-import android.text.method.ArrowKeyMovementMethod;
-import android.view.KeyEvent;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.view.inputmethod.EditorInfo;
-import android.widget.EditText;
-import android.widget.ImageButton;
-import android.widget.ListView;
-import android.widget.TextView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import com.handmark.pulltorefresh.library.PullToRefreshListView;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.entity.SavedSearch;
-import net.lacolaco.smileessence.preference.InternalPreferenceHelper;
-import net.lacolaco.smileessence.twitter.task.Searches;
-import net.lacolaco.smileessence.util.ListUtils;
-import net.lacolaco.smileessence.util.SystemServiceHelper;
-import net.lacolaco.smileessence.util.UIHandler;
-import net.lacolaco.smileessence.view.adapter.TimelineAdapter;
-import net.lacolaco.smileessence.view.dialog.ConfirmDialogFragment;
-import twitter4j.Query;
-
-import java.util.ArrayList;
-import java.util.List;
-
-public class SearchFragment extends CustomListFragment<TimelineAdapter> implements View.OnClickListener, View.OnLongClickListener,
-        View.OnFocusChangeListener {
-
-    // ------------------------------ FIELDS ------------------------------
-
-    private String queryString;
-    private TimelineAdapter adapter;
-    private EditText editText;
-
-    // --------------------- GETTER / SETTER METHODS ---------------------
-
-    @Override
-    protected PullToRefreshBase.Mode getRefreshMode() {
-        return PullToRefreshBase.Mode.BOTH;
-    }
-
-    // ------------------------ INTERFACE METHODS ------------------------
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setHasOptionsMenu(true);
-
-        queryString = InternalPreferenceHelper.getInstance().get(R.string.key_last_used_search_query, "");
-        android.app.Activity activity = getActivity();
-        adapter = new TimelineAdapter(activity);
-        setAdapter(adapter);
-
-        refresh();
-    }
-
-    @Override
-    public void refresh() { //TODO
-        if (!TextUtils.isEmpty(queryString)) {
-            startSearch(queryString);
-        }
-    }
-
-    // --------------------- Interface OnClickListener ---------------------
-
-    @Override
-    public void onClick(View v) {
-        switch (v.getId()) {
-            case R.id.button_search_queries: {
-                openSearchQueryDialog();
-                break;
-            }
-            case R.id.button_search_execute: {
-                search();
-                break;
-            }
-            case R.id.button_search_save: {
-                saveQuery();
-            }
-        }
-    }
-
-    @Override
-    public boolean onLongClick(View v) {
-        switch (v.getId()) {
-            case R.id.button_search_save: {
-                String text = editText.getText().toString();
-                for (SavedSearch ss : getWorld().getSavedSearches()) {
-                    if (ss.getQuery().equals(text)) {
-                        ConfirmDialogFragment.show(getActivity(), getString(R.string.dialog_confirm_delete_query), () -> new Searches.DestroySavedSearchTask(getWorld().getAccount(), ss.getId())
-                                .onDoneUI(x -> {
-                                    getWorld().notify(R.string.notice_search_query_deleted);
-                                    getWorld().refreshSavedSearches();
-                                })
-                                .onFailUI(x -> getWorld().notify("unable to delete search query"))
-                                .execute(), false);
-                        break;
-                    }
-                }
-                return true;
-            }
-        }
-        return false;
-    }
-
-    // --------------------- Interface OnFocusChangeListener ---------------------
-
-    @Override
-    public void onFocusChange(View v, boolean hasFocus) {
-        if (!hasFocus) {
-            SystemServiceHelper.hideIM(getActivity(), editText);
-        }
-    }
-
-    // --------------------- Interface OnRefreshListener2 ---------------------
-
-    @Override
-    public void onPullDownToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        if (TextUtils.isEmpty(queryString)) {
-            new UIHandler().post(() -> {
-                notifyTextEmpty();
-                refreshView.onRefreshComplete();
-            });
-            return;
-        }
-        final Query query = new Query();
-        query.setQuery(queryString);
-        query.setCount(200);
-        query.setResultType(Query.RECENT);
-        if (adapter.getCount() > 0) {
-            query.setSinceId(adapter.getTopID());
-        }
-        runRefreshTask(query, () -> {
-            updateListViewWithNotice(refreshView.getRefreshableView(), true);
-            refreshView.onRefreshComplete();
-        });
-    }
-
-    @Override
-    public void onPullUpToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        if (TextUtils.isEmpty(queryString)) {
-            new UIHandler().post(() -> {
-                notifyTextEmpty();
-                refreshView.onRefreshComplete();
-            });
-            return;
-        }
-        final Query query = new Query();
-        query.setQuery(queryString);
-        query.setCount(200);
-        query.setResultType(Query.RECENT);
-        if (adapter.getCount() > 0) {
-            query.setMaxId(adapter.getLastID() - 1);
-        }
-        runRefreshTask(query, () -> {
-            updateListViewWithNotice(refreshView.getRefreshableView(), false);
-            refreshView.onRefreshComplete();
-        });
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    protected PullToRefreshListView getListView(View page) {
-        return (PullToRefreshListView) page.findViewById(R.id.listview_search);
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-        View page = inflater.inflate(R.layout.fragment_search, container, false);
-        PullToRefreshListView listView = getListView(page);
-        listView.setAdapter(adapter);
-        listView.setOnScrollListener(this);
-        listView.setOnRefreshListener(this);
-        listView.setMode(getRefreshMode());
-        ImageButton buttonQueries = getQueriesButton(page);
-        buttonQueries.setOnClickListener(this);
-        ImageButton buttonExecute = getExecuteButton(page);
-        buttonExecute.setOnClickListener(this);
-        ImageButton buttonSave = getSaveButton(page);
-        buttonSave.setOnClickListener(this);
-        editText = getEditText(page);
-        editText.setOnFocusChangeListener(this);
-        editText.setText(queryString);
-        editText.setOnEditorActionListener((textView, i, keyEvent) -> {
-            if (i == EditorInfo.IME_ACTION_SEARCH ||
-                    keyEvent != null &&
-                            keyEvent.getAction() == KeyEvent.ACTION_DOWN &&
-                            keyEvent.getKeyCode() == KeyEvent.KEYCODE_ENTER) {
-                search();
-            }
-            return true;
-        });
-        editText.setMovementMethod(new ArrowKeyMovementMethod() {
-            @Override
-            protected boolean right(@NonNull TextView widget, Spannable buffer) {
-                //Don't move page
-                return widget.getSelectionEnd() == widget.length() || super.right(widget, buffer);
-            }
-
-            @Override
-            protected boolean left(@NonNull TextView widget, Spannable buffer) {
-                //Don't move page
-                return widget.getSelectionStart() == 0 || super.left(widget, buffer);
-            }
-        });
-        return page;
-    }
-
-    private EditText getEditText(View page) {
-        return (EditText) page.findViewById(R.id.edittext_search);
-    }
-
-    private ImageButton getExecuteButton(View page) {
-        return (ImageButton) page.findViewById(R.id.button_search_execute);
-    }
-
-    private ImageButton getQueriesButton(View page) {
-        return (ImageButton) page.findViewById(R.id.button_search_queries);
-    }
-
-    private ImageButton getSaveButton(View page) {
-        return (ImageButton) page.findViewById(R.id.button_search_save);
-    }
-
-    private void notifyTextEmpty() {
-        getWorld().notifyError(R.string.notice_search_text_empty);
-    }
-
-    private void openSearchQueryDialog() {
-        List<SavedSearch> sss = new ArrayList<>(getWorld().getSavedSearches());
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-        builder.setItems(ListUtils.map(sss, SavedSearch::getQuery).toArray(new String[]{}), (dialog, which) -> {
-            SavedSearch ss = sss.get(which);
-            ((MainActivity) getActivity()).openSearchPage(ss.getQuery());
-        });
-        AlertDialog dialog = builder.create();
-        dialog.show();
-    }
-
-    private void saveQuery() {
-        String text = editText.getText().toString();
-        if (TextUtils.isEmpty(text)) {
-            getWorld().notifyError(R.string.notice_query_is_empty);
-        } else {
-            new Searches.CreateSavedSearchTask(getWorld().getAccount(), text).onDoneUI(cb -> {
-                getWorld().notify(R.string.notice_query_saved);
-                getWorld().refreshSavedSearches();
-            }).onFailUI(ex -> getWorld().notifyError("Query is not saved")).execute();
-        }
-    }
-
-    private void search() {
-        if (editText != null) {
-            String text = editText.getText().toString();
-            if (TextUtils.isEmpty(text)) {
-                getWorld().notifyError(R.string.notice_query_is_empty);
-            } else {
-                startSearch(text);
-                SystemServiceHelper.hideIM(getActivity(), editText);
-            }
-        }
-    }
-
-    public void startSearch(final String queryString) {
-        InternalPreferenceHelper.getInstance().set(R.string.key_last_used_search_query, queryString);
-        if (editText != null)
-            editText.setText(queryString);
-        this.queryString = queryString;
-        adapter.clear();
-        adapter.updateForce();
-        if (!TextUtils.isEmpty(queryString)) {
-            final Query query = new Query();
-            query.setQuery(queryString);
-            query.setCount(200);
-            query.setResultType(Query.RECENT);
-            runRefreshTask(query, adapter::updateForce);
-        }
-    }
-
-    private void runRefreshTask(Query query, Runnable onFinish) {
-        new Searches.SearchTask(getWorld().getAccount(), query)
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_search))
-                .onDoneUI(tweets -> adapter.addAll(ListUtils.filter(tweets, t -> !t.isRetweet())))
-                .onFinishUI(onFinish)
-                .execute();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/SearchFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/SearchFragment.kt
new file mode 100644
index 00000000..de06a133
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/SearchFragment.kt
@@ -0,0 +1,299 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.app.AlertDialog
+import android.os.Bundle
+import android.text.Spannable
+import android.text.TextUtils
+import android.text.method.ArrowKeyMovementMethod
+import android.view.KeyEvent
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.view.inputmethod.EditorInfo
+import android.widget.EditText
+import android.widget.ImageButton
+import android.widget.ListView
+import android.widget.TextView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import com.handmark.pulltorefresh.library.PullToRefreshListView
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.preference.InternalPreferenceHelper
+import net.lacolaco.smileessence.twitter.task.Searches
+import net.lacolaco.smileessence.util.SystemServiceHelper
+import net.lacolaco.smileessence.util.UIHandler
+import net.lacolaco.smileessence.view.adapter.TimelineAdapter
+import net.lacolaco.smileessence.view.dialog.ConfirmDialogFragment
+import twitter4j.Query
+
+import java.util.ArrayList
+
+class SearchFragment : CustomListFragment<TimelineAdapter>(), View.OnClickListener, View.OnLongClickListener, View.OnFocusChangeListener {
+
+    // ------------------------------ FIELDS ------------------------------
+
+    private lateinit var queryString: String
+    private var editText: EditText? = null
+
+    // --------------------- GETTER / SETTER METHODS ---------------------
+
+    override val refreshMode: PullToRefreshBase.Mode
+        get() = PullToRefreshBase.Mode.BOTH
+
+    // ------------------------ INTERFACE METHODS ------------------------
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setHasOptionsMenu(true)
+
+        queryString = InternalPreferenceHelper.instance.get(R.string.key_last_used_search_query, "")
+        adapter = TimelineAdapter(activity)
+
+        refresh()
+    }
+
+    override fun refresh() { //TODO
+        if (!TextUtils.isEmpty(queryString)) {
+            startSearch(queryString)
+        }
+    }
+
+    // --------------------- Interface OnClickListener ---------------------
+
+    override fun onClick(v: View) {
+        when (v.id) {
+            R.id.button_search_queries -> {
+                openSearchQueryDialog()
+            }
+            R.id.button_search_execute -> {
+                search()
+            }
+            R.id.button_search_save -> {
+                saveQuery()
+            }
+        }
+    }
+
+    override fun onLongClick(v: View): Boolean {
+        when (v.id) {
+            R.id.button_search_save -> {
+                val text = editText!!.text.toString()
+                for (ss in world.savedSearches.values) {
+                    if (ss.query == text) {
+                        ConfirmDialogFragment.show(activity, getString(R.string.dialog_confirm_delete_query), {
+                            Searches.DestroySavedSearchTask(world.account, ss.id)
+                                    .onDoneUI { x ->
+                                        world.notify(R.string.notice_search_query_deleted)
+                                        world.refreshSavedSearches()
+                                    }
+                                    .onFailUI { x -> world.notify("unable to delete search query") }
+                                    .execute()
+                        }, false)
+                        break
+                    }
+                }
+                return true
+            }
+        }
+        return false
+    }
+
+    // --------------------- Interface OnFocusChangeListener ---------------------
+
+    override fun onFocusChange(v: View, hasFocus: Boolean) {
+        if (!hasFocus) {
+            SystemServiceHelper.hideIM(activity, editText)
+        }
+    }
+
+    // --------------------- Interface OnRefreshListener2 ---------------------
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        if (TextUtils.isEmpty(queryString)) {
+            UIHandler().post {
+                notifyTextEmpty()
+                refreshView.onRefreshComplete()
+            }
+            return
+        }
+        val query = Query()
+        query.query = queryString
+        query.count = 200
+        query.resultType = Query.RECENT
+        if (adapter.count > 0) {
+            query.sinceId = adapter.topID
+        }
+        runRefreshTask(query, {
+            updateListViewWithNotice(refreshView.refreshableView, true)
+            refreshView.onRefreshComplete()
+        })
+    }
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        if (TextUtils.isEmpty(queryString)) {
+            UIHandler().post {
+                notifyTextEmpty()
+                refreshView.onRefreshComplete()
+            }
+            return
+        }
+        val query = Query()
+        query.query = queryString
+        query.count = 200
+        query.resultType = Query.RECENT
+        if (adapter.count > 0) {
+            query.maxId = adapter.lastID - 1
+        }
+        runRefreshTask(query, {
+            updateListViewWithNotice(refreshView.refreshableView, false)
+            refreshView.onRefreshComplete()
+        })
+    }
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun getListView(page: View): PullToRefreshListView {
+        return page.findViewById(R.id.listview_search) as PullToRefreshListView
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup, savedInstanceState: Bundle?): View {
+        val page = inflater.inflate(R.layout.fragment_search, container, false)
+        val listView = getListView(page)
+        listView.setAdapter(adapter)
+        listView.setOnScrollListener(this)
+        listView.setOnRefreshListener(this)
+        listView.mode = refreshMode
+        val buttonQueries = getQueriesButton(page)
+        buttonQueries.setOnClickListener(this)
+        val buttonExecute = getExecuteButton(page)
+        buttonExecute.setOnClickListener(this)
+        val buttonSave = getSaveButton(page)
+        buttonSave.setOnClickListener(this)
+        editText = getEditText(page)
+        editText!!.onFocusChangeListener = this
+        editText!!.setText(queryString)
+        editText!!.setOnEditorActionListener { textView, i, keyEvent ->
+            if (i == EditorInfo.IME_ACTION_SEARCH || keyEvent != null &&
+                    keyEvent.action == KeyEvent.ACTION_DOWN &&
+                    keyEvent.keyCode == KeyEvent.KEYCODE_ENTER) {
+                search()
+            }
+            true
+        }
+        editText!!.movementMethod = object : ArrowKeyMovementMethod() {
+            override fun right(widget: TextView, buffer: Spannable): Boolean {
+                //Don't move page
+                return widget.selectionEnd == widget.length() || super.right(widget, buffer)
+            }
+
+            override fun left(widget: TextView, buffer: Spannable): Boolean {
+                //Don't move page
+                return widget.selectionStart == 0 || super.left(widget, buffer)
+            }
+        }
+        return page
+    }
+
+    private fun getEditText(page: View): EditText {
+        return page.findViewById(R.id.edittext_search) as EditText
+    }
+
+    private fun getExecuteButton(page: View): ImageButton {
+        return page.findViewById(R.id.button_search_execute) as ImageButton
+    }
+
+    private fun getQueriesButton(page: View): ImageButton {
+        return page.findViewById(R.id.button_search_queries) as ImageButton
+    }
+
+    private fun getSaveButton(page: View): ImageButton {
+        return page.findViewById(R.id.button_search_save) as ImageButton
+    }
+
+    private fun notifyTextEmpty() {
+        world.notifyError(R.string.notice_search_text_empty)
+    }
+
+    private fun openSearchQueryDialog() {
+        val sss = ArrayList(world.savedSearches.values)
+        val builder = AlertDialog.Builder(activity)
+        builder.setItems(sss.map { it.query }.toTypedArray()) { dialog, which ->
+            val ss = sss[which]
+            (activity as MainActivity).openSearchPage(ss.query)
+        }
+        val dialog = builder.create()
+        dialog.show()
+    }
+
+    private fun saveQuery() {
+        val text = editText!!.text.toString()
+        if (TextUtils.isEmpty(text)) {
+            world.notifyError(R.string.notice_query_is_empty)
+        } else {
+            Searches.CreateSavedSearchTask(world.account, text).onDoneUI { cb ->
+                world.notify(R.string.notice_query_saved)
+                world.refreshSavedSearches()
+            }.onFailUI { ex -> world.notifyError("Query is not saved") }.execute()
+        }
+    }
+
+    private fun search() {
+        if (editText != null) {
+            val text = editText!!.text.toString()
+            if (TextUtils.isEmpty(text)) {
+                world.notifyError(R.string.notice_query_is_empty)
+            } else {
+                startSearch(text)
+                SystemServiceHelper.hideIM(activity, editText)
+            }
+        }
+    }
+
+    fun startSearch(queryString: String) {
+        InternalPreferenceHelper.instance.set(R.string.key_last_used_search_query, queryString)
+        if (editText != null)
+            editText!!.setText(queryString)
+        this.queryString = queryString
+        adapter.clear()
+        adapter.updateForce()
+        if (!TextUtils.isEmpty(queryString)) {
+            val query = Query()
+            query.query = queryString
+            query.count = 200
+            query.resultType = Query.RECENT
+            runRefreshTask(query) { adapter.updateForce() }
+        }
+    }
+
+    private fun runRefreshTask(query: Query, onFinish: () -> Unit) {
+        Searches.SearchTask(world.account, query)
+                .onFail { x -> world.notifyError(R.string.notice_error_search) }
+                .onDoneUI { tweets -> adapter.addAll(tweets.filter { t -> !t.isRetweet }) }
+                .onFinishUI(onFinish)
+                .execute()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/UserListFragment.java b/app/src/main/java/net/lacolaco/smileessence/view/page/UserListFragment.java
deleted file mode 100644
index 3d19c5d6..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/page/UserListFragment.java
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * The MIT License (MIT)
- *
- * Copyright (c) 2012-2014 lacolaco.net
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package net.lacolaco.smileessence.view.page;
-
-import android.app.AlertDialog;
-import android.os.Bundle;
-import android.text.TextUtils;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.ImageButton;
-import android.widget.ListView;
-import android.widget.TextView;
-import com.handmark.pulltorefresh.library.PullToRefreshBase;
-import com.handmark.pulltorefresh.library.PullToRefreshListView;
-import net.lacolaco.smileessence.Application;
-import net.lacolaco.smileessence.R;
-import net.lacolaco.smileessence.activity.MainActivity;
-import net.lacolaco.smileessence.entity.Tweet;
-import net.lacolaco.smileessence.preference.InternalPreferenceHelper;
-import net.lacolaco.smileessence.twitter.task.TimelineTask;
-import net.lacolaco.smileessence.twitter.task.Timelines;
-import net.lacolaco.smileessence.util.UIHandler;
-import net.lacolaco.smileessence.view.adapter.TimelineAdapter;
-
-public class UserListFragment extends CustomListFragment<TimelineAdapter> implements View.OnClickListener {
-    private TextView textListName;
-    private String listFullName;
-
-    @Override
-    protected PullToRefreshBase.Mode getRefreshMode() {
-        return PullToRefreshBase.Mode.BOTH;
-    }
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        TimelineAdapter adapter = new TimelineAdapter(getActivity());
-        setAdapter(adapter);
-
-        refresh();
-    }
-
-    @Override
-    public void refresh() {//TODO
-        String lastUserList = InternalPreferenceHelper.getInstance().get(R.string.key_last_used_user_list, "");
-        if (!TextUtils.isEmpty(lastUserList)) {
-            startUserList(lastUserList);
-        }
-    }
-
-    @Override
-    public void onClick(View v) {
-        int id = v.getId();
-        switch (id) {
-            case R.id.button_userlist_lists: {
-                openUserListsDialog();
-                break;
-            }
-        }
-    }
-
-    @Override
-    public void onPullDownToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        if (listFullName == null) {
-            new UIHandler().post(() -> {
-                notifyTextEmpty();
-                refreshView.onRefreshComplete();
-            });
-            return;
-        }
-        runRefreshTask(
-                new Timelines.UserListStatusesTask(getWorld().getAccount(), listFullName)
-                        .setSinceId(getAdapter().getTopID()),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), true);
-                    refreshView.onRefreshComplete();
-                });
-    }
-
-    @Override
-    public void onPullUpToRefresh(final PullToRefreshBase<ListView> refreshView) {
-        if (listFullName == null) {
-            new UIHandler().post(() -> {
-                notifyTextEmpty();
-                refreshView.onRefreshComplete();
-            });
-            return;
-        }
-        runRefreshTask(
-                new Timelines.UserListStatusesTask(getWorld().getAccount(), listFullName)
-                        .setMaxId(getAdapter().getLastID() - 1),
-                () -> {
-                    updateListViewWithNotice(refreshView.getRefreshableView(), false);
-                    refreshView.onRefreshComplete();
-                });
-    }
-
-    // ------------------------ OVERRIDE METHODS ------------------------
-
-    @Override
-    protected PullToRefreshListView getListView(View page) {
-        return (PullToRefreshListView) page.findViewById(R.id.listview_userlist);
-    }
-
-    @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
-        View page = inflater.inflate(R.layout.fragment_userlist, container, false);
-        PullToRefreshListView listView = getListView(page);
-        TimelineAdapter adapter = getAdapter();
-        listView.setAdapter(adapter);
-        listView.setOnScrollListener(this);
-        listView.setOnRefreshListener(this);
-        listView.setMode(getRefreshMode());
-        ImageButton buttonUserLists = getUserListsButton(page);
-        buttonUserLists.setOnClickListener(this);
-        textListName = getTextListName(page);
-        textListName.setText(listFullName != null ? listFullName : "<none>");
-        return page;
-    }
-
-    private TextView getTextListName(View page) {
-        return (TextView) page.findViewById(R.id.textview_userlist_name);
-    }
-
-    private ImageButton getUserListsButton(View page) {
-        return (ImageButton) page.findViewById(R.id.button_userlist_lists);
-    }
-
-    private void notifyTextEmpty() {
-        getWorld().notifyError(R.string.notice_userlist_not_selected);
-    }
-
-    private void openUserListsDialog() {
-        final String[] ary = getWorld().getListSubscriptions().toArray(new String[]{});
-        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
-        builder.setTitle(R.string.dialog_title_select_userlist)
-                .setItems(ary, (dialog, which) -> {
-                    MainActivity activity = (MainActivity) getActivity();
-                    activity.openUserListPage(ary[which]);
-                    textListName.setText(ary[which]);
-                });
-        AlertDialog dialog = builder.create();
-        dialog.show();
-    }
-
-    public void startUserList(String listFullName) {
-        InternalPreferenceHelper.getInstance().set(R.string.key_last_used_user_list, listFullName);
-        final TimelineAdapter adapter = getAdapter();
-        this.listFullName = listFullName;
-        adapter.clear();
-        adapter.updateForce();
-        runRefreshTask(
-                new Timelines.UserListStatusesTask(getWorld().getAccount(), listFullName),
-                adapter::updateForce);
-    }
-
-    private void runRefreshTask(TimelineTask<Tweet> task, Runnable onFinish) {
-        final TimelineAdapter adapter = getAdapter();
-        task
-                .setCount(200)
-                .onFail(x -> getWorld().notifyError(R.string.notice_error_get_list))
-                .onDoneUI(tweets -> {
-                    getWorld().addTweetAll(tweets);
-                    adapter.addAll(tweets);
-                })
-                .onFinishUI(onFinish)
-                .execute();
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/page/UserListFragment.kt b/app/src/main/java/net/lacolaco/smileessence/view/page/UserListFragment.kt
new file mode 100644
index 00000000..3fb7ef49
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/page/UserListFragment.kt
@@ -0,0 +1,179 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2012-2014 lacolaco.net
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package net.lacolaco.smileessence.view.page
+
+import android.app.AlertDialog
+import android.os.Bundle
+import android.text.TextUtils
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.ImageButton
+import android.widget.ListView
+import android.widget.TextView
+import com.handmark.pulltorefresh.library.PullToRefreshBase
+import com.handmark.pulltorefresh.library.PullToRefreshListView
+import net.lacolaco.smileessence.Application
+import net.lacolaco.smileessence.R
+import net.lacolaco.smileessence.activity.MainActivity
+import net.lacolaco.smileessence.entity.Tweet
+import net.lacolaco.smileessence.preference.InternalPreferenceHelper
+import net.lacolaco.smileessence.twitter.task.TimelineTask
+import net.lacolaco.smileessence.twitter.task.Timelines
+import net.lacolaco.smileessence.util.UIHandler
+import net.lacolaco.smileessence.view.adapter.TimelineAdapter
+
+class UserListFragment : CustomListFragment<TimelineAdapter>(), View.OnClickListener {
+    private var textListName: TextView? = null
+    private var listFullName: String? = null
+
+    override val refreshMode: PullToRefreshBase.Mode
+        get() = PullToRefreshBase.Mode.BOTH
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        adapter = TimelineAdapter(activity)
+
+        refresh()
+    }
+
+    override fun refresh() {//TODO
+        val lastUserList = InternalPreferenceHelper.instance.get(R.string.key_last_used_user_list, "")
+        if (!TextUtils.isEmpty(lastUserList)) {
+            startUserList(lastUserList)
+        }
+    }
+
+    override fun onClick(v: View) {
+        val id = v.id
+        when (id) {
+            R.id.button_userlist_lists -> {
+                openUserListsDialog()
+            }
+        }
+    }
+
+    override fun onPullDownToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        if (listFullName == null) {
+            UIHandler().post {
+                notifyTextEmpty()
+                refreshView.onRefreshComplete()
+            }
+            return
+        }
+        runRefreshTask(
+                Timelines.UserListStatusesTask(world.account, listFullName!!)
+                        .setSinceId(adapter.topID),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, true)
+                    refreshView.onRefreshComplete()
+                })
+    }
+
+    override fun onPullUpToRefresh(refreshView: PullToRefreshBase<ListView>) {
+        if (listFullName == null) {
+            UIHandler().post {
+                notifyTextEmpty()
+                refreshView.onRefreshComplete()
+            }
+            return
+        }
+        runRefreshTask(
+                Timelines.UserListStatusesTask(world.account, listFullName!!)
+                        .setMaxId(adapter.lastID - 1),
+                {
+                    updateListViewWithNotice(refreshView.refreshableView, false)
+                    refreshView.onRefreshComplete()
+                })
+    }
+
+    // ------------------------ OVERRIDE METHODS ------------------------
+
+    override fun getListView(page: View): PullToRefreshListView {
+        return page.findViewById(R.id.listview_userlist) as PullToRefreshListView
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup, savedInstanceState: Bundle?): View {
+        val page = inflater.inflate(R.layout.fragment_userlist, container, false)
+        val listView = getListView(page)
+        val adapter = adapter
+        listView.setAdapter(adapter)
+        listView.setOnScrollListener(this)
+        listView.setOnRefreshListener(this)
+        listView.mode = refreshMode
+        val buttonUserLists = getUserListsButton(page)
+        buttonUserLists.setOnClickListener(this)
+        textListName = getTextListName(page)
+        textListName!!.text = if (listFullName != null) listFullName else "<none>"
+        return page
+    }
+
+    private fun getTextListName(page: View): TextView {
+        return page.findViewById(R.id.textview_userlist_name) as TextView
+    }
+
+    private fun getUserListsButton(page: View): ImageButton {
+        return page.findViewById(R.id.button_userlist_lists) as ImageButton
+    }
+
+    private fun notifyTextEmpty() {
+        world.notifyError(R.string.notice_userlist_not_selected)
+    }
+
+    private fun openUserListsDialog() {
+        val ary = world.listSubscriptions.toTypedArray<String>()
+        val builder = AlertDialog.Builder(activity)
+        builder.setTitle(R.string.dialog_title_select_userlist)
+                .setItems(ary) { dialog, which ->
+                    val activity = activity as MainActivity
+                    activity.openUserListPage(ary[which])
+                    textListName!!.text = ary[which]
+                }
+        val dialog = builder.create()
+        dialog.show()
+    }
+
+    fun startUserList(listFullName: String) {
+        InternalPreferenceHelper.instance.set(R.string.key_last_used_user_list, listFullName)
+        val adapter = adapter
+        this.listFullName = listFullName
+        adapter.clear()
+        adapter.updateForce()
+        runRefreshTask(Timelines.UserListStatusesTask(world.account, listFullName)) { adapter.updateForce() }
+    }
+
+    private fun runRefreshTask(task: TimelineTask<Tweet>, onFinish: () -> Unit) {
+        val adapter = adapter
+        task
+                .setCount(200)
+                .onFail { x -> world.notifyError(R.string.notice_error_get_list) }
+                .onDoneUI { tweets ->
+                    world.addTweetAll(tweets)
+                    adapter.addAll(tweets)
+                }
+                .onFinishUI(onFinish)
+                .execute()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerEditTextPreference.java b/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerEditTextPreference.java
deleted file mode 100644
index 88ad0879..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerEditTextPreference.java
+++ /dev/null
@@ -1,36 +0,0 @@
-package net.lacolaco.smileessence.view.preference;
-
-import android.annotation.TargetApi;
-import android.content.Context;
-import android.os.Build;
-import android.preference.EditTextPreference;
-import android.util.AttributeSet;
-
-public class IntegerEditTextPreference extends EditTextPreference {
-    public IntegerEditTextPreference(Context context) {
-        super(context);
-    }
-
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public IntegerEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-    }
-
-    public IntegerEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-    }
-
-    public IntegerEditTextPreference(Context context, AttributeSet attrs) {
-        super(context, attrs);
-    }
-
-    @Override
-    protected boolean persistString(String value) {
-        return persistInt(Integer.valueOf(value));
-    }
-
-    @Override
-    protected String getPersistedString(String defaultReturnValue) {
-        return String.valueOf(getPersistedInt(-1));
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerEditTextPreference.kt b/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerEditTextPreference.kt
new file mode 100644
index 00000000..e6a23696
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerEditTextPreference.kt
@@ -0,0 +1,26 @@
+package net.lacolaco.smileessence.view.preference
+
+import android.annotation.TargetApi
+import android.content.Context
+import android.os.Build
+import android.preference.EditTextPreference
+import android.util.AttributeSet
+
+class IntegerEditTextPreference : EditTextPreference {
+    constructor(context: Context) : super(context)
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes)
+
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
+
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
+
+    override fun persistString(value: String): Boolean {
+        return persistInt(Integer.valueOf(value)!!)
+    }
+
+    override fun getPersistedString(defaultReturnValue: String?): String {
+        return getPersistedInt(-1).toString()
+    }
+}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerListPreference.java b/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerListPreference.java
deleted file mode 100644
index f04a3b89..00000000
--- a/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerListPreference.java
+++ /dev/null
@@ -1,37 +0,0 @@
-package net.lacolaco.smileessence.view.preference;
-
-import android.annotation.TargetApi;
-import android.content.Context;
-import android.os.Build;
-import android.preference.ListPreference;
-import android.util.AttributeSet;
-
-public class IntegerListPreference extends ListPreference {
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public IntegerListPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
-        super(context, attrs, defStyleAttr, defStyleRes);
-    }
-
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public IntegerListPreference(Context context, AttributeSet attrs, int defStyleAttr) {
-        super(context, attrs, defStyleAttr);
-    }
-
-    public IntegerListPreference(Context context, AttributeSet attrs) {
-        super(context, attrs);
-    }
-
-    public IntegerListPreference(Context context) {
-        super(context);
-    }
-
-    @Override
-    protected boolean persistString(String value) {
-        return persistInt(Integer.valueOf(value));
-    }
-
-    @Override
-    protected String getPersistedString(String defaultReturnValue) {
-        return String.valueOf(getPersistedInt(-1));
-    }
-}
diff --git a/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerListPreference.kt b/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerListPreference.kt
new file mode 100644
index 00000000..7dbe3297
--- /dev/null
+++ b/app/src/main/java/net/lacolaco/smileessence/view/preference/IntegerListPreference.kt
@@ -0,0 +1,27 @@
+package net.lacolaco.smileessence.view.preference
+
+import android.annotation.TargetApi
+import android.content.Context
+import android.os.Build
+import android.preference.ListPreference
+import android.util.AttributeSet
+
+class IntegerListPreference : ListPreference {
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int, defStyleRes: Int) : super(context, attrs, defStyleAttr, defStyleRes)
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
+
+    constructor(context: Context, attrs: AttributeSet) : super(context, attrs)
+
+    constructor(context: Context) : super(context)
+
+    override fun persistString(value: String): Boolean {
+        return persistInt(Integer.valueOf(value)!!)
+    }
+
+    override fun getPersistedString(defaultReturnValue: String?): String {
+        return getPersistedInt(-1).toString()
+    }
+}