How to scroll to top of long ScrollView layout?
Try
mainScrollView.fullScroll(ScrollView.FOCUS_UP);
it should work.
Had the same issue, probably some kind of bug.
Even the fullScroll(ScrollView.FOCUS_UP) from the other answer didn't work.
Only thing that worked for me was calling scroll_view.smoothScrollTo(0,0) right after the dialog is shown.
i had the same problem and this fixed it. Hope it helps you.
listView.setFocusable(false);