how to smoothscroll recyclerview by a random place between two item in a proper time

Question

I want to smoothscroll the recyclerview to a random place between two items after clicking a button. By using

smoothScrollBy(dx , dy)

I can get the right place but cant control the speed/duration(too fast,i hope to make it slow).

By using

smoothScrollToPosition()

and implementing calculateSpeedPerPixel() i can control the speed but cant got the right place (cant stop between two items).

in fact i am looking for a way to do the same work as

ListView.smoothScrollBy(int distance, int duration).

Is there a solution?

Answer 1

Mark Allison has a blog post series that explains how you can customise and control the duration when you want to scroll to a position.

https://blog.stylingandroid.com/scrolling-recyclerview-part-1/

Answer 2

You should probably use this method with a custom interpolator: smoothScrollBy(int, int, Interpolator)

You can for example use an Accelerate Interpolator with a different value. Try varying the number to see what suits you:

smoothScrollBy(dx , dy, new AccelerateInterpolator(2));