control fling speed for recycler view

Question

I have a RecyclerView in which i have an image ,a few TextViews and 2 ImageButtons. I have 7-8 such rows to display in my Activity

Answer 1

I had the same problem. Here is the solution to slow down the fling.

        val maxFling=4000
        onFlingListener = object : RecyclerView.OnFlingListener() {
            override fun onFling(velocityX: Int, velocityY: Int): Boolean {
                if (velocityY > maxFling) {
                    fling(velocityX, maxFling)
                    return true
                } else if (velocityY < -maxFling) {
                    fling(velocityX, -maxFling)
                    return true
                } else {
                    return false
                }

            }

        }

Answer 2

There is one RecyclerView method specifically designed to control the fling speed you only need to override it to achieve the friction/slowdown effect you mentioned in your question.

One simple implementation you could try:

@Override
public boolean fling(int velocityX, int velocityY)
{

     // if FLING_SPEED_FACTOR between [0, 1[ => slowdown 
     velocityY *= FLING_SPEED_FACTOR; 

     return super.fling(velocityX, velocityY);
} 

Answer 3

RecyclerView is great in that it is super modular. you can set your custom scroller to the LayoutMananger

You can use https://github.com/apptik/MultiView/tree/master/scrollers

Example:

RecyclerView.SmoothScroller smoothScroller = new FlexiSmoothScroller(getContext())
                            .setMillisecondsPerInchSearchingTarget(100f));
smoothScroller.setTargetPosition(targetPos);
recyclerView.getLayoutManager().startSmoothScroll(smoothScroller);

you can check more examples at: https://github.com/apptik/MultiView/blob/master/app/src/main/java/io/apptik/multiview/ScrollersFragment.java

Answer 4

to control your recycler view's scroll speed See this SO post: Snappy scrolling in RecyclerView

Basically you could override recyclerviews smoothScroll, or implement your own onGestureListener and attach it to the recyclerView

Answer 5

This works nicely to put a maximum threshold on the fling speed:

mRecyclerView.setOnFlingListener(new RecyclerView.OnFlingListener() {

    @Override
    public boolean onFling(int velocityX, int velocityY) {

        if (Math.abs(velocityY) > MAX_VELOCITY_Y) {
            velocityY = MAX_VELOCITY_Y * (int) Math.signum((double)velocityY);
            mRecyclerView.fling(velocityX, velocityY);
            return true;
        }

        return false;
    }
});