Question

I have tasks completed by AsyncTask in background. At some point I need to issue a Toast that something is completed.

I’ve tried and I failed because
Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

How can I do that?

Answer 1

onPostExecute – executes on UI thread
or
publishProgress(); in your doinbackground and

protected void onProgressUpdate(Integer... progress) {
}

http://developer.android.com/reference/android/os/AsyncTask.html