如何在Flutter中查看同一页面的动态数据？

import 'package:flutter/material.dart';

class DynamicDataPage extends StatefulWidget {
  @override
  _DynamicDataPageState createState() => _DynamicDataPageState();
}

class _DynamicDataPageState extends State<DynamicDataPage> {
  String dynamicData = 'Initial Data'; // 初始化数据

  void fetchData() {
    // 模拟异步获取数据
    Future.delayed(Duration(seconds: 2), () {
      setState(() {
        dynamicData = 'Updated Data'; // 更新数据
      });
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Dynamic Data Page'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(
              dynamicData,
              style: TextStyle(fontSize: 20),
            ),
            RaisedButton(
              child: Text('Fetch Data'),
              onPressed: fetchData,
            ),
          ],
        ),
      ),
    );
  }
}