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

The timing of these calls is crucial. getViewTreeObserver().addOnGlobalLayoutListener didn't work for me but using the onWindowFocusChanged callback in my activity did:

@Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);

        if (hasFocus) {
            mScrollView.fullScroll(View.FOCUS_UP);
        }
    }