여러개의 통보가 올때 상단바에 하나만 나타나요
	어떻게 하면 여러개가 나타나나요?
	 
	        int icon = R.drawable.ic_stat_gcm;
	        long when = System.currentTimeMillis();
	        NotificationManager notificationManager = (NotificationManager)
	                context.getSystemService(Context.NOTIFICATION_SERVICE);
	        Notification notification = new Notification(icon, message, when);
	        String title = context.getString(R.string.app_name);
	        Intent notificationIntent = new Intent(context, DemoActivity.class);
	        // set intent so it does not start a new activity
	        notificationIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
	       // notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
	       //         Intent.FLAG_ACTIVITY_MULTIPLE_TASK);
	        PendingIntent intent =
	                PendingIntent.getActivity(context, 0, notificationIntent, 0);
	        notification.setLatestEventInfo(context, title, message, intent);
	        notification.defaults = Notification.DEFAULT_ALL;
	        notification.flags |= Notification.FLAG_SHOW_LIGHTS;
	        notification.flags |= Notification.FLAG_AUTO_CANCEL;
	        notificationManager.notify(0, notification);