带有confirmDismiss和showAlertDialog stop应用程序的Flutter可忽略小部件

import 'package:flutter/material.dart';

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Dismissible(
      confirmDismiss: (direction) async {
        return await showDialog(
          context: context,
          builder: (BuildContext context) {
            return AlertDialog(
              title: Text('确认'),
              content: Text('确定要删除或关闭该小部件吗？'),
              actions: <Widget>[
                FlatButton(
                  child: Text('取消'),
                  onPressed: () {
                    Navigator.of(context).pop(false);
                  },
                ),
                FlatButton(
                  child: Text('确定'),
                  onPressed: () {
                    Navigator.of(context).pop(true);
                  },
                ),
              ],
            );
          },
        );
      },
      onDismissed: (direction) {
        // 在这里执行删除或关闭操作
      },
      child: // 小部件的内容
    );
  }
}