如何在flutter中为整个应用程序设置文本颜色主题

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        textTheme: TextTheme(
          bodyText1: TextStyle(color: Colors.red), // 设置文本颜色为红色
          bodyText2: TextStyle(color: Colors.blue), // 设置文本颜色为蓝色
        ),
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter App'),
      ),
      body: Center(
        child: Text(
          'Hello World',
          style: Theme.of(context).textTheme.bodyText1, // 使用主题中定义的文本样式
        ),
      ),
    );
  }
}