如何在android小部件中使用新线程

public class MyWidget extends AppWidgetProvider {

    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        for (int appWidgetId : appWidgetIds) {
            // 创建新线程
            Thread thread = new Thread(new Runnable() {
                @Override
                public void run() {
                    // 执行耗时操作
                    // ...

                    // 更新小部件的UI
                    Handler handler = new Handler(Looper.getMainLooper());
                    handler.post(new Runnable() {
                        @Override
                        public void run() {
                            // 更新小部件的UI
                            // ...
                        }
                    });
                }
            });
            thread.start();
        }
    }
}