如何在 recyclerview 中控制滚动的 position

Question

i need when scroll to top position or first item show in the recyclerview do something like show toolbar and when scroll down or hide first item in recyclerview hide toolbar or do somethinghing

Answer 1

You can try enter image description here

Answer 2

Try this:

  contenuRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
        @Override
        public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
            super.onScrolled(recyclerView, dx, dy);

            if (yourLayoutManager.findFirstVisibleItemPosition() != 1){
                // visible toolbar
            } else {
                // gone toolbar
            }

        }
    });

yourLayoutManager can be:

• LinearLayoutManger
• GridLayoutManager
• StaggeredGridLayoutManager