CODEWITHSUNDEEP
androidandroid-recyclerviewandroid-scrollview
Prithniraj Nicyone
Prithniraj Nicyone

Reputation: 5111

How to check whether scrollview / recyclerview is scrolling to up or down android

I am working on android app and using recyclerview and scrollview in some activities. Now I want to show some layout when recyclerview/scrollview scrolls in up direction and hide the layout when it scrolls in down direction. I want a function which can tell that recyclerview/scrollview is scrolling in up or down direction.

Please help if anyone know how to do this for both recyclerview and scrollview.

Thanks a lot in advanced.

Upvotes: 0

Views: 6598

Answers (2)

Imran samed
Imran samed

Reputation: 61

A sure short answer for this issue

scroll.setOnScrollChangeListener(new View.OnScrollChangeListener() {
        @Override
        public void onScrollChange(View v, int scrollX, int scrollY, int oldScrollX, int oldScrollY) {


                    int x = scrollY - oldScrollY;
                    if (x > 0) {
                        //scroll up
                    } else if (x < 0) {
                       //scroll down
                    } else {

                    }


        }
    });

Upvotes: 3

Divyang Patel
Divyang Patel

Reputation: 347

Try this way:

private static int firstVisibleInListview;

firstVisibleInListview = yourLayoutManager.findFirstVisibleItemPosition();

In your scroll listener:

 public void onScrolled(RecyclerView recyclerView, int dx, int dy) 
{
 super.onScrolled(recyclerView, dx, dy);

 int currentFirstVisible = yourLayoutManager.findFirstVisibleItemPosition();

 if(currentFirstVisible > firstVisibleInListview)
   Log.i("RecyclerView scrolled: ", "scroll up!");
 else
   Log.i("RecyclerView scrolled: ", "scroll down!");  

 firstVisibleInListview = currentFirstVisible;

}

Upvotes: 2

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