如何使用flutter从facebook图形api获得更好的头像

import 'package:http/http.dart' as http;

Future<String> getFacebookAvatar(String userId) async {
  final response = await http.get(Uri.parse('https://graph.facebook.com/$userId/picture?type=large'));
  if (response.statusCode == 200) {
    return response.body;
  } else {
    throw Exception('Failed to load avatar');
  }
}

import 'package:flutter/material.dart';

class AvatarScreen extends StatelessWidget {
  final String avatarUrl;

  AvatarScreen({required this.avatarUrl});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Facebook Avatar'),
      ),
      body: Center(
        child: Image.network(avatarUrl),
      ),
    );
  }
}

String avatarUrl = await getFacebookAvatar('user_id_here');
Navigator.push(
  context,
  MaterialPageRoute(
    builder: (context) => AvatarScreen(avatarUrl: avatarUrl),
  ),
);