How to display Toast from a Service after main Activity finishes?

Question

UPDATE: I don\'t agree that this is a duplicate - because I am seeking for a way to exit the main app and still show a Toast from the service.

In a

Answer 1

OnHandleIntent is called on a background thread, and any attempt to touch the UI will result in a crash. Use an Handler to post a Runnable on the UI Thread to show your toast.

private class MyRunnable implements Runnable {

   final int mTextId = -1; 
   final Context mContext;
   public MyRunnable(Context c, int textId) {
       mTextId = textId;
       mContext = c;
   }

   @Override
   public void run() {
       Toast.makeText(mContext, 
           getString(mTextId), 
           Toast.LENGTH_SHORT).show();             
    }
}

   Handler handler = new Handler();
   handler.post(new MyRunnable(this, R.string.car_opened));