Merge pull request #167 from alethea/up-navigation

Up navigation

AndroidManifest.xml

@@ -40,7 +40,8 @@
             android:name="eu.siacs.conversations.ui.ConversationActivity"
             android:configChanges="orientation|screenSize"
             android:label="@string/title_activity_conversations"
-            android:windowSoftInputMode="stateHidden" >
+            android:windowSoftInputMode="stateHidden"
+            android:launchMode="singleTask" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 

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

@@ -398,18 +398,31 @@ public class ManageAccountActivity extends XmppActivity {
 		case R.id.action_add_account:
 			addAccount();
 			break;
-		case android.R.id.home:
-			if (xmppConnectionService.getConversations().size() == 0) {
-				startActivity(new Intent(getApplicationContext(),
-						ContactsActivity.class));
-			}
-			break;
 		default:
 			break;
 		}
 		return super.onOptionsItemSelected(item);
 	}
 
+	@Override
+	public boolean onNavigateUp() {
+		if (xmppConnectionService.getConversations().size() == 0) {
+			Intent contactsIntent = new Intent(this, ContactsActivity.class);
+			contactsIntent.setFlags(
+					// if activity exists in stack, pop the stack and go back to it
+					Intent.FLAG_ACTIVITY_CLEAR_TOP |
+					// otherwise, make a new task for it
+					Intent.FLAG_ACTIVITY_NEW_TASK |
+					// don't use the new activity animation; finish animation runs instead
+					Intent.FLAG_ACTIVITY_NO_ANIMATION);
+			startActivity(contactsIntent);
+			finish();
+			return true;
+		} else {
+			return super.onNavigateUp();
+		}
+	}
+
 	private void editAccount(Account account) {
 			EditAccount dialog = new EditAccount();
 			dialog.setAccount(account);

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

@@ -156,7 +156,9 @@ public abstract class XmppActivity extends Activity {
 		}
 		viewConversationIntent.setType(ConversationActivity.VIEW_CONVERSATION);
 		if (newTask) {
-			viewConversationIntent.setFlags(viewConversationIntent.getFlags() | Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP |  Intent.FLAG_ACTIVITY_TASK_ON_HOME );
+			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
+				| Intent.FLAG_ACTIVITY_NEW_TASK
+				| Intent.FLAG_ACTIVITY_SINGLE_TOP);
 		} else {
 			viewConversationIntent.setFlags(viewConversationIntent.getFlags()
 				| Intent.FLAG_ACTIVITY_CLEAR_TOP);