Load more / endless scroll for Xamarin RecyclerView

RecyclerViewActivity.cs

        public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
			var view = base.OnCreateView(inflater, container, savedInstanceState);
		
			var recyclerView = view.FindViewById<RecyclerView>(Resource.Id.my_recycler_view);
            if (recyclerView != null)
            {
                recyclerView.HasFixedSize = true;

                var layoutManager = new LinearLayoutManager(Activity);

				var onScrollListener = new XamarinRecyclerViewOnScrollListener (layoutManager);
				onScrollListener.LoadMoreEvent += (object sender, EventArgs e) => {
					//Load more stuff here
				};

				recyclerView.AddOnScrollListener (onScrollListener);

                recyclerView.SetLayoutManager(layoutManager);
			}
			return view;
		}

XamarinRecyclerViewOnScrollListener.cs

public class  XamarinRecyclerViewOnScrollListener : RecyclerView.OnScrollListener
    {
        public delegate void LoadMoreEventHandler(object sender, EventArgs e);
        public event LoadMoreEventHandler LoadMoreEvent;

        private LinearLayoutManager LayoutManager;

        public XamarinRecyclerViewOnScrollListener (LinearLayoutManager layoutManager)
        {
            LayoutManager = layoutManager;
        }

        public override void OnScrolled (RecyclerView recyclerView, int dx, int dy)
        {
            base.OnScrolled (recyclerView, dx, dy);

            var visibleItemCount = recyclerView.ChildCount;
            var totalItemCount = recyclerView.GetAdapter().ItemCount;
            var pastVisiblesItems = LayoutManager.FindFirstVisibleItemPosition();

            if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
                LoadMoreEvent (this, null);
            }
        }
    }

this is more accurate,

public class EndlessRecyclerOnScrollListener : RecyclerView.OnScrollListener
    {
        public delegate void LoadMoreEventHandler(object sender, EventArgs e);
        public event LoadMoreEventHandler LoadMoreEvent;

        private LinearLayoutManager LayoutManager;

        private int previousTotal = 0; // The total number of items in the dataset after the last load
        private bool loading = true; // True if we are still waiting for the last set of data to load.
        private bool animiFlag = true;
        private int visibleThreshold = 5; // The minimum amount of items to have below your current scroll position before loading more.
        int firstVisibleItem, visibleItemCount, totalItemCount;

        private int current_page = 1;

        public EndlessRecyclerOnScrollListener(LinearLayoutManager layoutManager)
        {
            LayoutManager = layoutManager;
        }

        public override void OnScrolled(RecyclerView recyclerView, int dx, int dy)
        {
            base.OnScrolled(recyclerView, dx, dy);

            visibleItemCount = recyclerView.ChildCount;
            totalItemCount = recyclerView.GetAdapter().ItemCount;
            firstVisibleItem = LayoutManager.FindFirstVisibleItemPosition();

            if (loading)
            {
                if (totalItemCount > previousTotal)
                {
                    loading = false;
                    previousTotal = totalItemCount;
                }
            }

            if (!loading && (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold))
            {
                current_page++;

                LoadMoreEvent(this, null);

                loading = true;
            }

            /*if ((visibleItemCount + pastVisiblesItems) >= totalItemCount)
            {
                LoadMoreEvent(this, null);
            }*/
        }
    }