protected override void OnCreate(Bundle bundle)        {            base.OnCreate(bundle);            // Set our view from the "main" layout resource            SetContentView(Resource.Layout.Main);            Thread t = new Thread(ThreadTest);            t.Start();        }private void ThreadTest()        {            int i = 0;            TextView timerView = FindViewById
     
      (Resource.Id.timerView);            while (true)            {                this.RunOnUiThread(delegate { timerView.Text = (i++).ToString(); }); //需要操作UI时，只需RunOnUiThread即可                Thread.Sleep(1000);            }        }
     

还有用handle，暂时没有试过