title: Get pending intent extra in activity with launcher flag
body: <p>In my app I show notification in some cases and when user click on notification it navigate to app by this code:</p>
  
  <pre><code>Intent onNotificationClicked = new Intent(G.context, MainActivity.class);
  onNotificationClicked.putExtra("DO", "clicked");
  onNotificationClicked.setAction(Intent.ACTION_MAIN);
  onNotificationClicked.addCategory(Intent.CATEGORY_LAUNCHER);
  PendingIntent ponNotificationClicked = PendingIntent.getActivity(ctx, 113, onNotificationClicked, PendingIntent.FLAG_UPDATE_CURRENT);
  this.contentIntent = ponNotificationClicked;
  </code></pre>
  
  <p>now in my MainActivity I want to get extras of this intent.but that is unavailable because this intent does not make a new activity and just bring the launched activity to front.so how can I handle this kind of intent in my app.</p>
  
  <p>thank you</p>