protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);

            ListAdapter = new CardItemsAdapter(this, CardItem.GenerateSampleCardItems());

            ListView.DividerHeight = 0;

            ListView.SetBackgroundColor(Android.Graphics.Color.ParseColor("#FFE5E5E5"));
        }
        public override bool OnOptionsItemSelected(Android.Views.IMenuItem item)
        {
            int height = WindowManager.DefaultDisplay.Height;

            if (item.ItemId == Resource.Id.menu_small)
            {
                ListAdapter = new CardItemsAdapter(this, height / 3, 50, CardItem.GenerateSampleCardItems());
            }
            if (item.ItemId == Resource.Id.menu_medium)
            {
                ListAdapter = new CardItemsAdapter(this, height / 2, 100, CardItem.GenerateSampleCardItems());
            }
            if (item.ItemId == Resource.Id.menu_default)
            {
                ListAdapter = new CardItemsAdapter(this, CardItem.GenerateSampleCardItems());
            }
            if (item.ItemId == Resource.Id.menuabout)
            {
                Toast.MakeText(this, "== F.Aro ==", ToastLength.Short).Show();
            }

            return(base.OnOptionsItemSelected(item));
        }