Auto smooth scrolling in Recycler view

Question

I use smooth recyclerView.smoothScrollBy(int dx , int dy) for scrolling. Put this method in handler and call the handler every 50 miliseconds. my speed range is 0 - 10. Runnable of handle scrolling is

   private Runnable runnableMove = new Runnable() {
    @Override
    public void run() {
        recyclerView.smoothScrollBy(0,speed * 4);
        handler.postDelayed(this,50);   
   };

Suddenly scrolling starts to lagging. And i must stop scrolling and start it again.

This is important and I sync 2 device and more (maybe 4 , 5) with the same item in recycler view and I need the scroll position of any of them to sync them together.

Most of the time one or two of the devices is slower or faster in scrolling. I need all device scroll with the same speed. How can I solve this problem in android.

score 1 · Answer 1 · edited Dec 18 '19 at 08:56

1

You could try to use an ObjectAnimator.

ObjectAnimator.ofInt(recyclerView, "scrollY", 1000).setDuration(12000).start()

Start this simultaneously on all devices and they should be in sync without any lag.

edited Dec 18 '19 at 08:56

Manaus

407
5
9

answered Nov 26 '19 at 14:28

ChristianoBolla

538
1
5
20

Ali Elahi · Accepted Answer · 2019-12-18T12:20:52.503

1

I found this method and it works for me:

recyclerView.smoothScrollBy(dx, dy, new LinearInterpolator(), time);

edited Dec 18 '19 at 12:20

answered Dec 18 '19 at 07:43

Ali Elahi

131
1
10

What dx and dy here? – Rizwan Ahmed Nov 01 '22 at 13:11
x = scroll value horizontally , y = scroll value vertically – Ali Elahi Nov 02 '22 at 15:02

Auto smooth scrolling in Recycler view

2 Answers2