在跨页面的flutter中存储会话数据的最佳实践

import 'package:flutter/material.dart';

class SessionData extends ChangeNotifier {
  String username;
  String token;

  void updateSession(String newUsername, String newToken) {
    username = newUsername;
    token = newToken;
    notifyListeners();
  }
}

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

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final sessionData = Provider.of<SessionData>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('Home Page'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text('Username: ${sessionData.username}'),
            Text('Token: ${sessionData.token}'),
          ],
        ),
      ),
    );
  }
}

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

class LoginPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final sessionData = Provider.of<SessionData>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('Login Page'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Login'),
          onPressed: () {
            // 模拟登录成功后更新会话数据
            sessionData.updateSession('John Doe', 'token123');
          },
        ),
      ),
    );
  }
}