从url下载图片并保存在flutter中的SD卡文件夹中

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

import 'package:permission_handler/permission_handler.dart';

Future<void> requestStoragePermission() async {
  await Permission.storage.request();
}

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

Future<void> downloadImage(String imageUrl) async {
  try {
    final response = await http.get(Uri.parse(imageUrl));
    if (response.statusCode == 200) {
      // 处理下载的图片数据
    } else {
      print('Failed to download image');
    }
  } catch (e) {
    print('Error: $e');
  }
}

import 'dart:io';

Future<void> saveImageToFile(ByteData bytesData, String filePath) async {
  try {
    final file = File(filePath);
    await file.writeAsBytes(bytesData.buffer.asUint8List());
  } catch (e) {
    print('Error saving file: $e');
  }
}

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

Future<void> downloadAndSaveImage(String imageUrl) async {
  await requestStoragePermission();
  final directory = await getExternalStorageDirectory();
  final filePath = '${directory.path}/images/${Uri.parse(imageUrl).path.split('/').last}';

  try {
    final response = await http.get(Uri.parse(imageUrl));
    if (response.statusCode == 200) {
      final bytesData = response.bodyBytes;
      await saveImageToFile(bytesData, filePath);
    } else {
      print('Failed to download image');
    }
  } catch (e) {
    print('Error: $e');
  }
}

Future<void> requestStoragePermission() async {
  await Permission.storage.request();
}

Future<void> saveImageToFile(ByteData bytesData, String filePath) async {
  try {
    final file = File(filePath);
    await file.writeAsBytes(bytesData.buffer.asUint8List());
  } catch (e) {
    print('Error saving file: $e');
  }
}