xamarin.android Android.Util.AndroidRuntimeException Message=Only the original thread that created a view hierarchy can touch its views.

Android.Util.AndroidRuntimeException
Message=Only the original thread that created a view hierarchy can touch its views.

错误产生原因，未在UI线程改变UI，导致出错。

xamarin.android 使用线程池处理耗时操作时，其UI更新应该回到UI线程再更新，处理方式如下：

ThreadPool.QueueUserWorkItem(thread => QueryBoxThread());

RunOnUiThread(() => {
lvAdapter.AddData(_boxLabel.ToString());
});

msdn参考链接：https://docs.microsoft.com/zh-cn/xamarin/android/app-fundamentals/writing-responsive-apps