Android: How to detect when a scroll has ended

Question

I am using the onScroll method of GestureDetector.SimpleOnGestureListener to scroll a large bitmap on a canvas. When the scroll has ended I want to redraw the bitmap in case

Answer 1

I haven't done this myself but looking at onTouch() you always get a sequence 0<2>1, so the end has to be a 1 for finger lift.