Use Asynctask to display a ProgressBar in Android

Question

I am trying to do display a ProgressBar.

I am an Android beginner.

When I press the button, the task should be running in the background, but it does not display

Answer 1

Add to OnPostExecute method :

pg.setVisibility(View.INVISIBLE);

Add to onPreExecute method :

pg.setVisibility(View.VISIBLE);

and in Layout file you should add to progress bar :

android:visibility="invisible"