clear parent activities pending view intent before calling startAcitvityForResult()

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

@@ -902,7 +902,11 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
 
     private void handleNegativeActivityResult(int requestCode) {
         switch (requestCode) {
-            //nothing to do for now
+            case ATTACHMENT_CHOICE_TAKE_PHOTO:
+                if (pendingTakePhotoUri.clear()) {
+                    Log.d(Config.LOGTAG,"cleared pending photo uri after negative activity result");
+                }
+                break;
         }
     }
 
@@ -1761,6 +1765,15 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
         }
     }
 
+    @Override
+    public void startActivityForResult(Intent intent, int requestCode) {
+        final Activity activity = getActivity();
+        if (activity instanceof ConversationsActivity) {
+            ((ConversationsActivity) activity).clearPendingViewIntent();
+        }
+        super.startActivityForResult(intent, requestCode);
+    }
+
     @Override
     public void onSaveInstanceState(Bundle outState) {
         super.onSaveInstanceState(outState);
@@ -1872,6 +1885,7 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
     public void reInit(Conversation conversation, Bundle extras) {
         QuickLoader.set(conversation.getUuid());
         this.saveMessageDraftStopAudioPlayer();
+        this.clearPending();
         if (this.reInit(conversation, extras != null)) {
             if (extras != null) {
                 processExtras(extras);
@@ -2662,11 +2676,13 @@ public class ConversationFragment extends XmppFragment implements EditMessage.Ke
     }
 
     private void clearPending() {
-        if (postponedActivityResult.pop() != null) {
+        if (postponedActivityResult.clear()) {
             Log.e(Config.LOGTAG, "cleared pending intent with unhandled result left");
         }
-        pendingScrollState.pop();
+        if (pendingScrollState.clear()) {
-        if (pendingTakePhotoUri.pop() != null) {
+            Log.e(Config.LOGTAG,"cleared scroll state");
+        }
+        if (pendingTakePhotoUri.clear()) {
             Log.e(Config.LOGTAG, "cleared pending photo uri");
         }
     }

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

@@ -418,6 +418,7 @@ public class ConversationsActivity extends XmppActivity implements OnConversatio
 
     @Override
     public void onConversationSelected(Conversation conversation) {
+        clearPendingViewIntent();
         if (ConversationFragment.getConversation(this) == conversation) {
             Log.d(Config.LOGTAG, "ignore onConversationSelected() because conversation is already open");
             return;
@@ -425,6 +426,12 @@ public class ConversationsActivity extends XmppActivity implements OnConversatio
         openConversation(conversation, null);
     }
 
+    public void clearPendingViewIntent() {
+        if (pendingViewIntent.clear()) {
+            Log.e(Config.LOGTAG, "cleared pending view intent");
+        }
+    }
+
     private void displayToast(final String msg) {
         runOnUiThread(() -> Toast.makeText(ConversationsActivity.this, msg, Toast.LENGTH_SHORT).show());
     }

src/main/java/eu/siacs/conversations/ui/util/PendingItem.java

@@ -46,4 +46,10 @@ public class PendingItem<T> {
 	public synchronized T peek() {
 		return item;
 	}
+
+	public synchronized boolean clear() {
+		boolean notNull = this.item != null;
+		this.item = null;
+		return notNull;
+	}
 }