回顾onBindViewHolder向上滚动Recycler视图

Question

I have list of images in my Recycler View and on scrolling down the recycler view, onBindViewHolder is called.

I want to call onBindViewHolder again when I scroll up the recycler view so that I can get the position of currently viewed image.

How to call onBindViewHolder again(on scrolling up)?

Answer 1

That might not be the best way to figure out the currently viewed image, however you can add a scroll listener to your recycler view and whenever the dy scroll is negative you can call adapter.notifyDataSetChanged, so onBindViewHolder is called again

   mFragmentListBinding.movieGrid.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                if (dy < 0) {
                   mAdapter.notifyDataSetChanged();
                }
            }
        });