handle view conversation action when ConversationFragment is already open

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

@@ -168,17 +168,24 @@ public class ConversationActivity extends XmppActivity implements OnConversation
 		final boolean mainNeedsRefresh;
 		if (conversationFragment == null) {
 			mainNeedsRefresh = false;
+			Fragment mainFragment = getFragmentManager().findFragmentById(R.id.main_fragment);
+			if (mainFragment != null && mainFragment instanceof ConversationFragment) {
+				conversationFragment = (ConversationFragment) mainFragment;
+			} else {
 				conversationFragment = new ConversationFragment();
 				FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
 				fragmentTransaction.replace(R.id.main_fragment, conversationFragment);
 				fragmentTransaction.addToBackStack(null);
 				fragmentTransaction.commit();
+			}
 		} else {
 			mainNeedsRefresh = true;
 		}
 		conversationFragment.reInit(conversation);
 		if (mainNeedsRefresh) {
 			refreshFragment(R.id.main_fragment);
+		} else {
+			invalidateActionBarTitle();
 		}
 	}
 

src/main/java/eu/siacs/conversations/ui/ConversationFragment.java

@@ -727,6 +727,12 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
 		}
 	}
 
+	@Override
+	public void onDetach() {
+		super.onDetach();
+		this.activity = null;
+	}
+
 	@Override
 	public void onCreate(Bundle savedInstanceState) {
 		super.onCreate(savedInstanceState);

src/main/java/eu/siacs/conversations/ui/ConversationsOverviewFragment.java

@@ -54,13 +54,23 @@ import eu.siacs.conversations.ui.util.PendingItem;
 
 public class ConversationsOverviewFragment extends XmppFragment implements EnhancedListView.OnDismissCallback {
 
-	private FragmentConversationsOverviewBinding binding;
-
 	private final List<Conversation> conversations = new ArrayList<>();
+	private final PendingItem<Conversation> swipedConversation = new PendingItem<>();
+	private FragmentConversationsOverviewBinding binding;
 	private ConversationAdapter conversationsAdapter;
 	private XmppActivity activity;
 
-	private final PendingItem<Conversation> swipedConversation = new PendingItem<>();
+	public static Conversation getSuggestion(Activity activity) {
+		Fragment fragment = activity.getFragmentManager().findFragmentById(R.id.main_fragment);
+		if (fragment != null && fragment instanceof ConversationsOverviewFragment) {
+			List<Conversation> conversations = ((ConversationsOverviewFragment) fragment).conversations;
+			if (conversations.size() > 0) {
+				return conversations.get(0);
+			}
+		}
+		return null;
+
+	}
 
 	@Override
 	public void onAttach(Activity activity) {
@@ -73,6 +83,12 @@ public class ConversationsOverviewFragment extends XmppFragment implements Enhan
 		}
 	}
 
+	@Override
+	public void onDetach() {
+		super.onDetach();
+		this.activity = null;
+	}
+
 	@Override
 	public View onCreateView(final LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
 		Log.d(Config.LOGTAG, "onCreateView");
@@ -191,16 +207,4 @@ public class ConversationsOverviewFragment extends XmppFragment implements Enhan
 			}
 		};
 	}
-
-	public static Conversation getSuggestion(Activity activity) {
-		Fragment fragment = activity.getFragmentManager().findFragmentById(R.id.main_fragment);
-		if (fragment != null && fragment instanceof ConversationsOverviewFragment) {
-			List<Conversation> conversations = ((ConversationsOverviewFragment) fragment).conversations;
-			if (conversations.size() > 0) {
-				return conversations.get(0);
-			}
-		}
-		return null;
-
-	}
 }