RecyclerView scrolled UP/DOWN listener

Question

How do we know if user scrolled down or up in RecyclerView ?

I tried with RecyclerView#OnScrollListener , it gives the amount of vertical s

Answer 1

I wanted to hide a layout if the recyclerview is scrolled down and then make it visible if the recyclerview is scrolled up. I did some thinking and came up with this logic. Variable y is a global static int. Do not forget to declare y as static int y;

I hope it helps someone :)

 mRecyclerView.addOnScrollListener(new EndlessRecyclerOnScrollListener(lLayout) {
           @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
            // super.onScrolled(recyclerView, dx, dy);
                y=dy;
            }

            @Override
            public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
                super.onScrollStateChanged(recyclerView, newState);
                if(mRecyclerView.SCROLL_STATE_DRAGGING==newState){
                    //fragProductLl.setVisibility(View.GONE);
                }
                if(mRecyclerView.SCROLL_STATE_IDLE==newState){
                   // fragProductLl.setVisibility(View.VISIBLE);
                    if(y<=0){
                        fragProductLl.setVisibility(View.VISIBLE);
                    }
                    else{
                        y=0;
                        fragProductLl.setVisibility(View.GONE);
                    }
                }
            }
        });