如何在flutter中设置布局元素的背景色

import 'package:flutter/material.dart';

Container(
  color: Colors.red,
  child: ... // 布局元素的子组件
)

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 Background Color'),
        ),
        body: Center(
          child: Container(
            color: Colors.red,
            child: Text(
              'Hello, Flutter!',
              style: TextStyle(
                fontSize: 24,
                color: Colors.white,
              ),
            ),
          ),
        ),
      ),
    );
  }
}