TimelineActivity.java

public class TimelineActivity {
    private RefreshTimelineReceiver refreshReceiver;
	
    public void onResume() {
        super.onResume();
        IntentFilter filter = new IntentFilter(RefreshService.REFRESH_TIMELINE);
        refreshReceiver = new RefreshTimelineReceiver();
        registerReceiver(refreshReceiver, filter);
    }
    
    public void onPause() {
        super.onPause();
        unregisterReceiver(refreshReceiver);
    }
    
    public class RefreshTimelineReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            showNewMessages();
            showNotification();
        }
    }
}