Calculate the Displacement of Scrollview while user scrolling

I'm using GustureListner for a scrollview.

In that I have to calculate how many pixel th开发者_开发百科at scrollview is moved during fling event.

I can get velocity and fling start and end position.

Better to do is extends SimpleOnGestureListener to your OnTouchListener class, so you can override onFling and onScroll.
Refer this GestureDetector.SimpleOnGestureListener