changed support lib to v13. added tabs and fragments to start conversation activity

AndroidManifest.xml

@@ -48,6 +48,12 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity 
+            android:name="eu.siacs.conversations.ui.StartConversation"
+            android:label="@string/title_activity_start_conversation"
+            android:parentActivityName="eu.siacs.conversations.ui.ConversationActivity"
+            android:logo="@drawable/ic_activity"
+            ></activity>
         <activity
             android:name="eu.siacs.conversations.ui.SettingsActivity"
             android:label="@string/title_activity_settings"

res/layout/activity_start_conversation.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/start_conversation_view_pager"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+</android.support.v4.view.ViewPager>

res/values/strings.xml

@@ -21,6 +21,7 @@
     <string name="title_activity_contact_details">Contact Details</string>
     <string name="title_activity_conversations">Conversations</string>
     <string name="title_activity_sharewith">Share with Conversation</string>
+    <string name="title_activity_start_conversation">Start Conversation</string>
     <string name="just_now">just now</string>
     <string name="minute_ago">1 min ago</string>
     <string name="minutes_ago">%d mins ago</string>
@@ -254,4 +255,5 @@
     <string name="otr_fingerprint">OTR fingerprint</string>
     <string name="verify">Verify</string>
     <string name="decrypt">Decrypt</string>
-</resources>
+    <string name="conferences">Conferences</string>
+</resources>

src/eu/siacs/conversations/ui/ConversationActivity.java

@@ -488,7 +488,7 @@ public class ConversationActivity extends XmppActivity {
 			attachFilePopup.show();
 			break;
 		case R.id.action_add:
-			startActivity(new Intent(this, ContactsActivity.class));
+			startActivity(new Intent(this, StartConversation.class));
 			break;
 		case R.id.action_archive:
 			this.endConversation(getSelectedConversation());

src/eu/siacs/conversations/ui/StartConversation.java

@@ -1,7 +1,87 @@
 package eu.siacs.conversations.ui;
 
+import android.app.ActionBar;
+import android.app.ActionBar.Tab;
+import android.app.ActionBar.TabListener;
+import android.app.Fragment;
+import android.app.FragmentTransaction;
+import android.app.ListFragment;
+import android.os.Bundle;
+import android.support.v13.app.FragmentPagerAdapter;
+import android.support.v4.view.ViewPager;
+import eu.siacs.conversations.R;
+
 public class StartConversation extends XmppActivity {
 
+	private Tab mContactsTab;
+	private Tab mConferencesTab;
+	private ViewPager mViewPager;
+	private ListFragment mContactsListFragment = new ListFragment();
+	private ListFragment mConferenceListFragment = new ListFragment();
+
+	private TabListener mTabListener = new TabListener() {
+
+		@Override
+		public void onTabUnselected(Tab tab, FragmentTransaction ft) {
+			// TODO Auto-generated method stub
+
+		}
+
+		@Override
+		public void onTabSelected(Tab tab, FragmentTransaction ft) {
+			mViewPager.setCurrentItem(tab.getPosition());
+		}
+
+		@Override
+		public void onTabReselected(Tab tab, FragmentTransaction ft) {
+			// TODO Auto-generated method stub
+
+		}
+	};
+
+	private ViewPager.SimpleOnPageChangeListener mOnPageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
+		@Override
+		public void onPageSelected(int position) {
+			getActionBar().setSelectedNavigationItem(position);
+		}
+	};
+
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		setContentView(R.layout.activity_start_conversation);
+		mViewPager = (ViewPager) findViewById(R.id.start_conversation_view_pager);
+		ActionBar actionBar = getActionBar();
+		actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
+
+		mContactsTab = actionBar.newTab().setText(R.string.contacts)
+				.setTabListener(mTabListener);
+		mConferencesTab = actionBar.newTab().setText(R.string.conferences)
+				.setTabListener(mTabListener);
+		actionBar.addTab(mContactsTab);
+		actionBar.addTab(mConferencesTab);
+
+		
+		mViewPager.setOnPageChangeListener(mOnPageChangeListener);
+		mViewPager.setAdapter(new FragmentPagerAdapter(getFragmentManager()) {
+			
+			@Override
+			public int getCount() {
+				return 2;
+			}
+			
+			@Override
+			public Fragment getItem(int position) {
+				if (position==0) {
+					return mContactsListFragment;
+				} else {
+					return mConferenceListFragment;
+				}
+			}
+		});
+
+	}
+
 	@Override
 	void onBackendConnected() {
 		// TODO Auto-generated method stub