Question

我创建了一个看起来像这样的简单Renderer

using Android.Runtime;
using Android.Widget;
using Example.Pages.MaterialPages;
using Example.Droid.Renderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(MaterialsListView), typeof(MaterialsListViewRenderer))]
namespace Example.Droid.Renderers
{
   public class MaterialsListViewRenderer : ListViewRenderer
   {
      public MaterialsListViewRenderer() {}
   }

   internal class ScrollListener : Java.Lang.Object, AbsListView.IOnScrollListener
   {
      public void OnScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { }

      public void OnScrollStateChanged(AbsListView view, [GeneratedEnum] ScrollState scrollState)
      {
         if (scrollState == ScrollState.TouchScroll)
         {
            // GET THE CURRENT FOCUSED ELEMENT
         }
      }
   }
}

现在我需要在Java中获得当前焦点，如getCurrentFocus。但是我怎么能在Xamarin中做到这一点？

Answer 1

您需要将Context的{{1}}转换为ListView。

Activity

渲染器获得当前焦点

1 个答案: