如何在flutter中显示来自json图像/series/20200518140210_HgQ2G.jpg这样的图像？

dependencies:
  http: ^0.13.3
  cached_network_image: ^3.0.0

import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;
import 'package:cached_network_image/cached_network_image.dart';

Future<String> fetchImageURL() async {
  final response = await http.get(Uri.parse('https://example.com/your_json_url'));
  if (response.statusCode == 200) {
    final json = jsonDecode(response.body);
    final imageURL = json['image']['url'];
    return imageURL;
  } else {
    throw Exception('Failed to load image URL');
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return FutureBuilder<String>(
      future: fetchImageURL(),
      builder: (context, snapshot) {
        if (snapshot.hasData) {
          return CachedNetworkImage(
            imageUrl: snapshot.data,
            placeholder: (context, url) => CircularProgressIndicator(),
            errorWidget: (context, url, error) => Icon(Icons.error),
          );
        } else if (snapshot.hasError) {
          return Text('Error: ${snapshot.error}');
        } else {
          return CircularProgressIndicator();
        }
      },
    );
  }
}