Xamarin.Android:自动刷新ImageView的显示，不需要再次调用整个activity

using Android.App;
using Android.OS;
using Android.Widget;
using System.Timers;

namespace XamarinApp
{
    [Activity(Label = "XamarinApp", MainLauncher = true)]
    public class MainActivity : Activity
    {
        private ImageView imageView;
        private Timer timer;

        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.Main);

            // 获取ImageView实例
            imageView = FindViewById<ImageView>(Resource.Id.imageView);

            // 创建定时器
            timer = new Timer();
            timer.Interval = 1000; // 设置刷新间隔，单位为毫秒
            timer.Elapsed += TimerElapsed;
            timer.Start();
        }

        private void TimerElapsed(object sender, ElapsedEventArgs e)
        {
            // 在定时器回调函数中更新ImageView的显示内容
            RunOnUiThread(() =>
            {
                // 更新ImageView的显示内容，例如更换图片资源
                imageView.SetImageResource(Resource.Drawable.image);
            });
        }
    }
}