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我的问题是这((BaseAdapter)listAdapter).NotifyDataSetChanged();不起作用。我使用计时器每 X 分钟获取一次新闻。我进行了调试并看到了数据适配器的变化，但在屏幕上没有任何变化。如果我缩放屏幕上看到的新数据。加载时未触发列表视图单击事件。更改 listadapter 并执行缩放单击事件后。

请你帮助我好吗？

[Activity (Label = "SportNews")]            
public class SportNews : Activity
{
    RssFeedItemAdapter listAdapter;
    JavaList<FeedItem> items = new JavaList<FeedItem>();
    protected override void OnCreate (Bundle bundle)
    {
        base.OnCreate (bundle);

        SetContentView(Resource.Layout.list_view);

        items = RssHelper.Instance.SportNews();

        //ListAdapter = new ArrayAdapter<string> (this, Resource.Layout.list_item, items);
        listAdapter = new RssFeedItemAdapter(this,items);

        ListView listView = FindViewById<ListView>(Resource.Id.listView);

        listView.Adapter = listAdapter;

        ((BaseAdapter)listAdapter).NotifyDataSetChanged();

        listView.ItemClick += new EventHandler<AdapterView.ItemClickEventArgs>(listView_ItemClick);

        Timer timer = new Timer(PushNews, null, TimeSpan.Zero, TimeSpan.FromMinutes(15)); // get time from user preferences...
    }
    private void PushNews(object state)
    {
        items = RssHelper.Instance.SportNews();
        JavaList<FeedItem> feeds = new JavaList<FeedItem>();
        feeds.Add(new FeedItem()
        {
         NewsPicture = "http://www.website.com/pic/test.jpg",
         NewsTitle = "Test news",
         NewsUrl = "http://www.google.com",
        });
        listAdapter = new RssFeedItemAdapter(this,feeds);
        ((BaseAdapter)this.listAdapter).NotifyDataSetChanged();
    }

    void listView_ItemClick(object sender, Android.Widget.AdapterView.ItemClickEventArgs e)
    {
        //Get our item from the list adapter
        var item = this.listAdapter.GetItemAtPosition(e.Position);

        var intent = new Intent();
        intent.SetClass(this, typeof(NewsView));
        intent.PutExtra("Url", item.NewsUrl);
        StartActivity(intent);
    }
}
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