Workaround for Listview SelectedItem issues with buttons on the ViewCell

CustomCell Renderer

//Create a renderer for the viewcell
public class CustomCell : ViewCellRenderer
{
		protected override global::Android.Views.View GetCellCore (Cell item, global::Android.Views.View convertView, ViewGroup parent, Context context)
		{
			var cell = base.GetCellCore (item, convertView, parent, context);
			(cell as ViewGroup).DescendantFocusability = DescendantFocusability.BlockDescendants;
			return cell;
		}
}

//don't forget to Export the renderer 
[assembly: ExportRenderer (typeof (ViewCell), typeof (CustomCell))]