ScrollView scrollTo doesn't work

Question

Same issue as ScrollView .scrollTo not working? Saving ScrollView position on rotation

I dynamically add items to scrollView in onCreate. I try the following after a

Answer 1

You don't need to extend the ScrollView and create your own as per the answer provided by David Daudelin for the this question.

Get the ViewTreeObserver of the ScrollView and add an OnGlobalLayoutListener to the ViewTreeObserver. Then call the ScrollView.scrollTo(x,y) method from the onGlobalLayout() method of the OnGlobalLayoutListener. Code:

 ScrollView mainScroll = (ScrollView) findViewById(R.id.average_scroll_mainScroll);

 ViewTreeObserver vto = scrollView.getViewTreeObserver();
 vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
      public void onGlobalLayout() {
           mainScroll.scrollTo(0, 0);
      }
 });