Flutter:如何为圆形头像设置背景图像

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('Circular Avatar with Background Image'),
        ),
        body: Center(
          child: Container(
            width: 200,
            height: 200,
            decoration: BoxDecoration(
              image: DecorationImage(
                image: AssetImage('assets/background.jpg'),
                fit: BoxFit.cover,
              ),
              borderRadius: BorderRadius.circular(100),
            ),
            child: ClipOval(
              child: Image.asset(
                'assets/avatar.jpg',
                width: 180,
                height: 180,
                fit: BoxFit.cover,
              ),
            ),
          ),
        ),
      ),
    );
  }
}