Android: How to scroll ScrollView in top

Question

I have two buttons that switching to the next list of events and the previous one.

When I go to next\\previous event, scrolls remains somewhere below. But I need to

Answer 1

This did not work for me:

scrollViewEventDetails.fullScroll(View.FOCUS_UP); //if you move at the end of the scroll

This worked for me:

scroll_view.smoothScrollTo(0,0);