如何将数据从一个函数内部传递到flutter中的不同类

class MyClass {
  final int data;

  MyClass(this.data);
}

void main() {
  int myData = 10;
  MyClass myClass = MyClass(myData);
}

class MyClass {
  int data;
}

void main() {
  MyClass myClass = MyClass();
  myClass.data = 10;
}

class MyClass {
  void onDataReceived(int data) {
    // 处理接收到的数据
  }
}

class AnotherClass {
  void doSomething(void Function(int) callback) {
    int myData = 10;
    callback(myData);
  }
}

void main() {
  MyClass myClass = MyClass();
  AnotherClass anotherClass = AnotherClass();
  anotherClass.doSomething(myClass.onDataReceived);
}

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

class MyData with ChangeNotifier {
  int _data = 10;

  int get data => _data;

  set data(int value) {
    _data = value;
    notifyListeners();
  }
}

class MyClass extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    int myData = Provider.of<MyData>(context).data;
    // 使用myData进行操作
    return Container();
  }
}

void main() {
  runApp(
    ChangeNotifierProvider(
      create: (context) => MyData(),
      child: MyApp(),
    ),
  );
}