[assembly: ExportRenderer(typeof(CustomViewCell), typeof(CustomViewCellRenderer))]
namespace MyVTUCSE.Droid
{
 public class CustomViewCellRenderer : ViewCellRenderer
    {

        private Android.Views.View _cellCore;
        private Drawable _unselectedBackground;
        private bool _selected;

        protected override Android.Views.View GetCellCore(Cell item,
                                                          Android.Views.View convertView,
                                                          ViewGroup parent,
                                                          Context context)
        {
            _cellCore = base.GetCellCore(item, convertView, parent, context);

            _selected = false;
            _unselectedBackground = _cellCore.Background;

            return _cellCore;
        }

        protected override void OnCellPropertyChanged(object sender, PropertyChangedEventArgs args)
        {
            base.OnCellPropertyChanged(sender, args);

            if (args.PropertyName == "IsSelected")
            {
                _selected = !_selected;

                if (_selected)
                {
                    var extendedViewCell = sender as CustomViewCell;
                    _cellCore.SetBackgroundColor(extendedViewCell.SelectedItemBackgroundColor.ToAndroid());
                }
                else
                {
                    _cellCore.SetBackground(_unselectedBackground);
                }
            }
        }
    }
}