如何使用Flutter中的ChangeNotifier将变量数据放入类中？

import 'package:flutter/foundation.dart';

class MyClass with ChangeNotifier {
  // 定义需要共享的变量
  String _myVariable = '';

  // 定义获取变量的方法
  String get myVariable => _myVariable;

  // 定义修改变量的方法
  void setMyVariable(String value) {
    _myVariable = value;
    // 通知监听者数据发生变化
    notifyListeners();
  }
}

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider(
      create: (context) => MyClass(),
      child: Consumer<MyClass>(
        builder: (context, myClass, _) {
          return Text(myClass.myVariable);
        },
      ),
    );
  }
}

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class AnotherWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return RaisedButton(
      onPressed: () {
        var myClass = Provider.of<MyClass>(context, listen: false);
        myClass.setMyVariable('New Value');
      },
      child: Text('Change Variable'),
    );
  }
}