Stikcy header breaks on Android side for Vertical grid layout.

[gsalve]

For grid layout it is not working correctly at some cases.

[gsalve]

May be this is beacause of the Empty footer view that was added in the bottom.

[gsalve]

If we scroll fast through the Grid list view then it is showing.

[gsalve]

GetHeaderLayout returns the wrong item if we scroll fast.
headerView = recyclerView.GetChildAt(topItemInRecyclerViewIndex); it is not giving correct data always if we scroll fast.

public VIEW GetHeaderLayout(int itemPosition)
{
var headerPosition = 0;

        for (int i = 0; i < VM.Items.Count; i++)
        {
            itemPosition -= VM.Items[i].Count;
            itemPosition--;
            if (itemPosition >= 0)
            {
                headerPosition++;
            }
            else
            {
                break;
            }
        }            

        if (_stickyHeaderCache.ContainsKey(headerPosition))
        {
            return _stickyHeaderCache[headerPosition];
        }

        System.Console.WriteLine("$$$$$ itemPosition : headerPosition :" +itemPosition + " : " + headerPosition);

        var recyclerView = (View as RecyclerView);
        var topItemInRecyclerViewIndex = 0;
        var headerView = recyclerView.GetChildAt(topItemInRecyclerViewIndex);
        var headerView1 = recyclerView.GetChildAt(topItemInRecyclerViewIndex + 1);

        if (headerView.Height >= headerView1.Height)
		{
            System.Console.WriteLine("$$$$$ invalid added :" + headerPosition);
            return default;
        }
            
        if (IsHeader(itemPosition))
        {
            var bitmap = Bitmap.CreateBitmap(headerView.Width, headerView.Height, Bitmap.Config.Argb8888);
            var canvas = new Canvas(bitmap);
            headerView.Draw(canvas);

            var imageView = new ImageView(Context);
            imageView.SetImageBitmap(bitmap);
            var layoutParams = new LayoutParams(headerView.Width, headerView.Height);
            imageView.LayoutParameters = layoutParams;
            _stickyHeaderCache.Add(headerPosition, imageView);

            System.Console.WriteLine("$$$$$ headerPosition added :" + headerPosition);
            System.Console.WriteLine("$$$$$ recyclerView :" + recyclerView);

            return imageView;
        }
        return default;
    }

    public bool IsHeader(int itemPosition) => StickyHeaderAdapter.GetItemViewType(itemPosition) == ItemViewType.GroupHeader ? true : false;
}

[valentasm1]

@gsalve did you found solution on fast scroll issue?