Question

my 1st page have a spinner, that will parse value to the 2nd activity.. I set onBackPressed on the 2nd page to go back to my home page, but the problem is, the spinner selection is not being reset.. why?

Answer 1

When you return from activity B to activity A, the onRestart method in activity A will be called.
You can override that method and clear you spinner there.

@Override
public void onRestart()
{
   //clear your spinner here... spinner.setSelection(0) or something..
   super.onResume();
}

Here is an explanation:

onRestart : Called after your activity has been stopped, prior to it being started again.
Always followed by onStart()