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javaandroidbinary-semaphore

Java: stuck in an infinite loop

I want to do stuff only when my service gets completely stopped.

So I made a public static variable initialized it to false, in onCreate(), to true and in onDestroy(), to false.

In my activity:

if(TripService.trip_service_state)
{
   stopService(newIntent(ProfileActivity.this,TripService.class));
   while (TripService.trip_service_state);
   do_stuff();
}

In my service:

public static boolean trip_service_state=false;

onCreate()
{
    super.onCreate();
    trip_service_state=true;
}

onDestroy()
{
   trip_service_state=false;
   super.onDestroy();
}

Now when my service is running, app gets NOT RESPONDING message.

Solution

  • Since a Service is executed on the same thread as an Activity, the code which would set the flag to false can't be executed: the Activity method does never stop. That's why you get an ANR.

    You can send a Broadcast from the Service to the Activity via LocalBroadcastManager instead. (The Activity would have to dynamically register and unregister a corresponding BroadcastReceiver)