Pagination using retrofit to fetch next 10 items from API on scrolling in android

Using RecyclerView.OnScrollListener and RecyclerView.LayoutManager you can find index of the last visible item. If the index equals to the total items count - 1 you can consider it as the end of the list and load the next page.

recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        if (dy > 0) //check for scroll down
        {
            int totalItemCount = layoutManager.getItemCount();
            int lastVisibleItemPosition = layoutManager.findLastVisibleItemPosition();
            if (!loading && lastVisibleItemPosition == totalItemCount - 1) {
                loading = true;
                currentPage = currentPage + 1;
                if (!dynamicPages.equalsIgnoreCase("")) {
                    loadMoreData(currentPage);
                }
            }
        }
    }
});