Crashing in onPostExecute in AuthTask

[woodmicha]

Looks likes the Auth task is trying to leverage activity level variables and the activity is null. Crashes on this line:

OAuthFragment.this.getActivity().setProgressBarIndeterminateVisibility(false);

The cause is OAuthFragment.this.getActivity() returns null

Attempt to invoke virtual method 'void android.support.v4.app.FragmentActivity.setProgressBarIndeterminateVisibility(boolean)' on a null object reference

It doesn't happen often but I've seen it 4 times. Perhaps the user is closing the activity before the async tasks is done?

Any ideas?