如何从网络下载图像并在flutter中脱机用作资产图像

dependencies:
  flutter:
    sdk: flutter
  http: ^0.13.3
  path_provider: ^2.0.2

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

Future<File> downloadImage(String url) async {
  var response = await http.get(Uri.parse(url));
  var dir = await getTemporaryDirectory();
  var file = File('${dir.path}/image.jpg');
  await file.writeAsBytes(response.bodyBytes);
  return file;
}

import 'package:flutter/material.dart';

class MyImageWidget extends StatelessWidget {
  final String imageUrl;

  MyImageWidget({required this.imageUrl});

  @override
  Widget build(BuildContext context) {
    return FutureBuilder<File>(
      future: downloadImage(imageUrl),
      builder: (context, snapshot) {
        if (snapshot.connectionState == ConnectionState.done) {
          if (snapshot.hasError) {
            return Text('Error: ${snapshot.error}');
          } else {
            return Image.file(snapshot.data!);
          }
        } else {
          return CircularProgressIndicator();
        }
      },
    );
  }
}

MyImageWidget(imageUrl: 'https://example.com/image.jpg'),