View pager and FragmentStatePagerAdapter used to scroll active chats.

app/build.gradle

@@ -27,4 +27,5 @@ android {
 dependencies {
     compile files('libs/otr4j.jar')
     compile 'com.android.support:appcompat-v7:21.0.3'
+    compile 'com.android.support:support-v13:21.0.3'
 }

app/src/main/java/com/xabber/android/ui/adapter/ChatMessageAdapter.java

@@ -309,8 +309,7 @@ public class ChatMessageAdapter extends BaseAdapter implements UpdatableAdapter
 
     @Override
     public void onChange() {
-        messages = new ArrayList<>(MessageManager.getInstance()
-                .getMessages(account, user));
+        messages = new ArrayList<>(MessageManager.getInstance().getMessages(account, user));
         hint = getHint();
         notifyDataSetChanged();
     }

app/src/main/java/com/xabber/android/ui/adapter/ChatViewerAdapter.java

+package com.xabber.android.ui.adapter;
+
+
+import android.app.Fragment;
+import android.app.FragmentManager;
+import android.support.v13.app.FragmentStatePagerAdapter;
+import android.view.ViewGroup;
+
+import com.xabber.android.data.LogManager;
+import com.xabber.android.data.message.AbstractChat;
+import com.xabber.android.data.message.MessageManager;
+import com.xabber.android.ui.ChatViewerFragment;
+import com.xabber.xmpp.address.Jid;
+
+import java.util.ArrayList;
+
+public class ChatViewerAdapter extends FragmentStatePagerAdapter implements UpdatableAdapter {
+
+    private ArrayList<AbstractChat> activeChats;
+
+    public ChatViewerAdapter(FragmentManager fragmentManager) {
+        super(fragmentManager);
+
+        LogManager.i(this, "ChatViewerAdapter");
+
+        onChange();
+    }
+
+    @Override
+    public int getCount() {
+        return activeChats.size();
+    }
+
+    @Override
+    public Fragment getItem(int i) {
+        LogManager.i(this, "getItem: " + i);
+
+
+        AbstractChat abstractChat = getChat(i);
+
+        return ChatViewerFragment.newInstance(abstractChat.getAccount(), abstractChat.getUser());
+    }
+
+    public AbstractChat getChat(int i) {
+        return activeChats.get(i);
+    }
+
+    @Override
+    public void onChange() {
+        LogManager.i(this, "onChange: ");
+
+        activeChats = new ArrayList<>(MessageManager.getInstance().getActiveChats());
+        notifyDataSetChanged();
+    }
+
+    public int getPosition(String account, String user) {
+        LogManager.i(this, "getPosition: " + account + " : " + user);
+
+        activeChats = new ArrayList<>(MessageManager.getInstance().getActiveChats());
+
+        for (int position = 0; position < activeChats.size(); position++) {
+            if (activeChats.get(position).equals(account, user)) {
+                return position;
+            }
+        }
+
+        LogManager.i(this, "creating new chat: " + account + " : " + user);
+        AbstractChat chat = MessageManager.getInstance().getOrCreateChat(account, Jid.getBareAddress(user));
+        activeChats.add(chat);
+        notifyDataSetChanged();
+
+        return activeChats.indexOf(chat);
+    }
+
+
+    @Override
+    public void setPrimaryItem(ViewGroup container, int position, Object object) {
+        super.setPrimaryItem(container, position, object);
+
+        LogManager.i(this, "setPrimaryItem position: " + position);
+    }
+
+}
\ No newline at end of file

app/src/main/java/com/xabber/android/ui/helper/ContactTitleInflater.java

@@ -50,46 +50,53 @@ public class ContactTitleInflater {
      */
     public static void updateTitle(View titleView, final Activity activity,
                                    AbstractContact abstractContact) {
-        final TypedArray typedArray = activity
-                .obtainStyledAttributes(R.styleable.ContactList);
+        final TypedArray typedArray = activity.obtainStyledAttributes(R.styleable.ContactList);
+
         final Drawable titleAccountBackground = typedArray
                 .getDrawable(R.styleable.ContactList_titleAccountBackground);
         typedArray.recycle();
+
         final TextView nameView = (TextView) titleView.findViewById(R.id.name);
-        final ImageView avatarView = (ImageView) titleView
-                .findViewById(R.id.avatar);
-        final ImageView statusModeView = (ImageView) titleView
-                .findViewById(R.id.status_mode);
+        final ImageView avatarView = (ImageView) titleView.findViewById(R.id.avatar);
+        final ImageView statusModeView = (ImageView) titleView.findViewById(R.id.status_mode);
         final TextView statusTextView = (TextView) titleView.findViewById(R.id.status_text);
         final View shadowView = titleView.findViewById(R.id.shadow);
+
         titleView.setBackgroundDrawable(titleAccountBackground);
         nameView.setText(abstractContact.getName());
-        statusModeView.setImageLevel(abstractContact.getStatusMode()
-                .getStatusLevel());
-        titleView.getBackground().setLevel(
-                AccountManager.getInstance().getColorLevel(
+        statusModeView.setImageLevel(abstractContact.getStatusMode().getStatusLevel());
+        titleView.getBackground().setLevel(AccountManager.getInstance().getColorLevel(
                         abstractContact.getAccount()));
         avatarView.setImageDrawable(abstractContact.getAvatar());
+
+        setStatusText(activity, abstractContact, statusTextView);
+
+        final Bitmap bitmap = BitmapFactory.decodeResource(activity.getResources(), R.drawable.shadow);
+        final BitmapDrawable shadowDrawable = new BitmapDrawable(bitmap);
+        shadowDrawable.setTileModeXY(TileMode.REPEAT, TileMode.REPEAT);
+        shadowView.setBackgroundDrawable(shadowDrawable);
+
+        if (abstractContact.isConnected()) {
+            shadowView.setVisibility(View.GONE);
+        } else {
+            shadowView.setVisibility(View.VISIBLE);
+        }
+    }
+
+    private static void setStatusText(Activity activity, AbstractContact abstractContact,
+                                      TextView statusTextView) {
         ChatState chatState = ChatStateManager.getInstance().getChatState(
                 abstractContact.getAccount(), abstractContact.getUser());
+
         final CharSequence statusText;
-        if (chatState == ChatState.composing)
+        if (chatState == ChatState.composing) {
             statusText = activity.getString(R.string.chat_state_composing);
-        else if (chatState == ChatState.paused)
+        } else if (chatState == ChatState.paused) {
             statusText = activity.getString(R.string.chat_state_paused);
-        else
-            statusText = Emoticons.getSmiledText(activity,
-                    abstractContact.getStatusText());
+        } else {
+            statusText = Emoticons.getSmiledText(activity, abstractContact.getStatusText());
+        }
         statusTextView.setText(statusText);
-        final Bitmap bitmap = BitmapFactory.decodeResource(
-                activity.getResources(), R.drawable.shadow);
-        final BitmapDrawable shadowDrawable = new BitmapDrawable(bitmap);
-        shadowDrawable.setTileModeXY(TileMode.REPEAT, TileMode.REPEAT);
-        shadowView.setBackgroundDrawable(shadowDrawable);
-        if (abstractContact.isConnected())
-            shadowView.setVisibility(View.GONE);
-        else
-            shadowView.setVisibility(View.VISIBLE);
     }
 
 }

app/src/main/res/layout/activity_chat_viewer.xml

+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/pager"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+
+</android.support.v4.view.ViewPager>
\ No newline at end of file

app/src/main/res/layout/chat_viewer.xml

-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c) 2013, Redsolution LTD. All rights reserved.
-
-     This file is part of Xabber project; you can redistribute it and/or
-     modify it under the terms of the GNU General Public License, Version 3.
-
-     Xabber is distributed in the hope that it will be useful, but
-     WITHOUT ANY WARRANTY; without even the implied warranty of
-     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-     See the GNU General Public License for more details.
-
-     You should have received a copy of the GNU General Public License,
-     along with this program. If not, see http://www.gnu.org/licenses/.
--->
-<com.xabber.android.ui.widget.PageSwitcher
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    android:id="@+id/switcher"
-    />
\ No newline at end of file

app/src/main/res/layout/chat_viewer_container.xml

-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (c) 2013, Redsolution LTD. All rights reserved.
-
-     This file is part of Xabber project; you can redistribute it and/or
-     modify it under the terms of the GNU General Public License, Version 3.
-
-     Xabber is distributed in the hope that it will be useful, but
-     WITHOUT ANY WARRANTY; without even the implied warranty of
-     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
-     See the GNU General Public License for more details.
-
-     You should have received a copy of the GNU General Public License,
-     along with this program. If not, see http://www.gnu.org/licenses/.
--->
-<LinearLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/container"
-    android:orientation="vertical"
-    android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    />