private void LvMakanan_ItemTapped(object sender, Syncfusion.ListView.XForms.ItemTappedEventArgs e)
        {
            var item = (CategoryItem)e.ItemData;

            Global.Instance.myData.HistoriJawaban += item.CategoryID.ToString() + ",";
            var subPage = new SubListViewGridMakanan();

            subPage.BindingContext = item;
            Navigation.PushAsync(subPage);
        }
        private void SubListView_ItemTapped(object sender, Syncfusion.ListView.XForms.ItemTappedEventArgs e)
        {
            var item = (SubCategoryItem)e.ItemData;

            Global.Instance.myData.HistoriJawaban += item.SubCategoryID.ToString() + ",";
            if (item.SubCategoryItems == null)
            {
                var detailPage = new DetailPageMakanan();
                detailPage.BindingContext = item;
                Navigation.PushAsync(detailPage);
            }
            else
            {
                var subPage = new SubListViewGridMakanan();
                subPage.BindingContext = item;
                Navigation.PushAsync(subPage);
            }
        }