Android Status Bar Notification: make it un-clearable and have it return to app (not start a new instance)

Question

I am developing an Android app and I want a status bar notification that cannot be cleared by the user. Does anyone know how to do that? I've seen them with apps like Skimble where a non-clearable notification appears while using the application.

Also, I'd when the user clicks/presses the notification, I want it to return to the app instance that is already running. Right now it starts a new instance. Again like the Skimble app, I just want to return to the already running instance of the app.

Thanks.

Answer 1

I found a solution to this problem. I used FLAG_ONGOING_EVENT to make the notification persist. Here's the code:

  String ns = Context.NOTIFICATION_SERVICE;
  NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

    int icon = R.drawable.mypic;
    long when = System.currentTimeMillis();
    Notification notification = new Notification(icon, tickerText, when);
    notification.flags = Notification.FLAG_ONGOING_EVENT;

    Context context = getApplicationContext();
    CharSequence contentTitle = "Title Text";
    CharSequence contentText = "Content text.";

    Intent intent = new Intent(this, MyClass.class); 
    intent.setAction("android.intent.action.MAIN"); 
    intent.addCategory("android.intent.category.LAUNCHER"); 
    PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, 0); 

    notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent);

    final int HELLO_ID = 1;
    mNotificationManager.notify(HELLO_ID, notification);