title: Should I call super.onPostExecute(result) in Android AsyncTask?
body: <p>I wonder if it has any meaning to call super.onPostExecute(result) or super.onPreExecute in Android AsyncTask? 
  I have been always calling them, but even in Android documentation about AsyncTask (<a href="http://developer.android.com/reference/android/os/AsyncTask.html">Android API Reference: AsyncTask</a>) they are omitted. 
  So does it make any sense if I call them or not?</p>