Flutter :如何在可重用appbar的图像上调用屏幕

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          flexibleSpace: Image.network(
            'https://example.com/image.jpg',
            fit: BoxFit.cover,
          ),
          title: Text('My App'),
        ),
        body: Center(
          child: Text('Hello, World!'),
        ),
      ),
    );
  }
}