如何在flutter中刷新文本

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter Text Refresh Example'),
        ),
        body: Center(child: MyTextWidget()),
      ),
    );
  }
}

class MyTextWidget extends StatefulWidget {
  @override
  _MyTextWidgetState createState() => _MyTextWidgetState();
}

class _MyTextWidgetState extends State<MyTextWidget> {
  String _text = 'Initial Text';

  void _refreshText() {
    setState(() {
      _text = 'Updated Text';
    });
  }

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: <Widget>[
        Text(_text),
        ElevatedButton(
          onPressed: _refreshText,
          child: Text('Refresh Text'),
        ),
      ],
    );
  }
}