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 don't know Android, but looking at the documentation it seems Rob is right: Android ACTION_UP constant Try checking for ACTION_UP from getAction()?

Edit: What does e1.getAction() show? Does it ever return ACTION_UP? The documentation says it holds the initial down event, so maybe it'll also notify when the pointer is up

Edit: Only two more things I can think of. Are you returning false at any point? That may prevent ACTION_UP

The only other thing I'd try is to have a seperate event, maybe onDown, and set a flag within onScroll such as isScrolling. When ACTION_UP is given to onDown and isScrolling is set then you could do whatever you want and reset isScrolling to false. That is, assuming onDown gets called along with onScroll, and getAction will return ACTION_UP during onDown