Weird “Receiver not registered” exception

Question

In onResume() I do:

registerReceiver(timeTickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));

and in onPause():

unregi         


        

Answer 1

A BroadcastReceiver should be registered in the onCreate() lifecycle method:

private BroadcastReceiver receiver;

@Overrride
public void onCreate(Bundle savedInstanceState){
    IntentFilter filter = new IntentFilter();

    receiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            ...
        }
    }

    registerReceiver(receiver, filter);
}    

And a BroadcastReceiver should be unregistered in the onDestory() lifecycle method:

@Override
protected void onDestroy() {
    unregisterReceiver(receiver);
}

This will prevent the scenario of unregistering a BroadcastReceiver that has not yet been registered.