How can I calculate the frame rate of scrolling?

I have a scroller view like the launcher workspace. How do I know the frame rate while t开发者_Go百科he view is scrolling?

I assume that you are interested in a number of in-between repaints per second, upper bound of which is determined by a processing delay between consecutive repaints. You may be able to measure this beforehand by a smooth scroll of one vertical pixel.