Android: PendingIntent from Notification doesn't trigger the onCreate() if bringing Activity back on Screen

Question

guess I'm having some misunderstandigs with the Intent Flags.. What I'm trying to do is, I'm having a radio streaming applications, which has two Activities (PlayerApplication and SettingsScreen). I have a Service.class for Streaming which runs in the background, which holds a Notification as well (you can stop/start playback in the notification-overlay menu and the PlayerApplication). If the User clicks on the Notification, the PlayerApplicationActivity should be com back to screen.

Everything works fine, expect the case: User opens SettingsScreenActivity -> opens NotificationOverlayMenu -> clicks at Notification -> PendingIntent resumes to PlayerApplicationActivity

Now, PlayerApplicationScreen is there, but I cannot click anything. I see, that the onCreate() of my PlayerApplication isn't triggered, if I resume from Notification. But the layout looks fine (also inflated in the onCreate())

I used following PendingIntent in the Service.class:

PendingIntent contentIntent = PendingIntent.getActivity(
      this.getApplicationContext(), //Service.class
      0, 
      new Intent(this,PlayerApplicationActivity.class)
             .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP
                | Intent.FLAG_ACTIVITY_SINGLE_TOP),
      0);

So actually the PendingIntent should bring the Activity (if already running) back to the top. Am I using wrong Intents or am I missing a point?

EDIT: and I declared launchMode in Manifest.xml

android:launchMode="singleTask"

Answer 1

According to android developer site, In FLAG_ACTIVITY_CLEAR_TOP,FLAG_ACTIVITY_SINGLE_TOP and in launch mode : SingleTask , If the instance of activity you are calling is already running then instead of creating new instance, it call onNewIntent() method. So I think you should check this condition that your activity is running when onCreate() is not calling.

Answer 2

I just figured out what I was doing wrong:

1. For my purpose I used the wrong launchMode. Right one is singleTop not singleTask

2. I declared the launchMode in the <application-node> instead of the <activity-node>

   //Manifest.xml
   <activity
       android:name="..."
       android:launchMode="singleTop" >