Get visible items in RecyclerView

First / last visible child depends on the LayoutManager.If you are using LinearLayoutManager or GridLayoutManager, you can use

int findFirstVisibleItemPosition();int findFirstCompletelyVisibleItemPosition();int findLastVisibleItemPosition();int findLastCompletelyVisibleItemPosition();

For example:

GridLayoutManager layoutManager = ((GridLayoutManager)mRecyclerView.getLayoutManager());int firstVisiblePosition = layoutManager.findFirstVisibleItemPosition();

For LinearLayoutManager, first/last depends on the adapter ordering. Don't query children from RecyclerView; LayoutManager may prefer to layout more items than visible for caching.

for those who have a logic to be implemented inside the RecyclerView adapter you can still use @ernesto approach combined with an on scrollListener to get what you want as the RecyclerView is consulted. Inside the adapter you will have something like this:

@Override    public void onAttachedToRecyclerView(@NonNull RecyclerView recyclerView) {        super.onAttachedToRecyclerView(recyclerView);        RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();        if(manager instanceof LinearLayoutManager && getItemCount() > 0) {            LinearLayoutManager llm = (LinearLayoutManager) manager;            recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {                @Override                public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {                    super.onScrollStateChanged(recyclerView, newState);                }                @Override                public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {                    super.onScrolled(recyclerView, dx, dy);                        int visiblePosition = llm.findFirstCompletelyVisibleItemPosition();                        if(visiblePosition > -1) {                            View v = llm.findViewByPosition(visiblePosition);                            //do something                            v.setBackgroundColor(Color.parseColor("#777777"));                        }                }            });        }    }

Finally, I found a solution to know if the current item is visible, from the onBindViewHolder event in the adapter.

The key is the method isViewPartiallyVisible from LayoutManager.

In your adapter, you can get the LayoutManager from the RecyclerView, which you get as parameter from the onAttachedToRecyclerView event.