如何在flutter中保存扫描的二维码图像？

dependencies:
  image_picker: ^0.8.4+4

import 'package:image_picker/image_picker.dart';

final picker = ImagePicker();

Future<void> getImageFromCamera() async {
  final pickedFile = await picker.getImage(source: ImageSource.camera);
  // 处理获取到的图像
}

Future<void> getImageFromGallery() async {
  final pickedFile = await picker.getImage(source: ImageSource.gallery);
  // 处理获取到的图像
}

import 'dart:io';

Future<void> saveImage(File imageFile) async {
  // 获取应用的文档目录
  final appDir = await getApplicationDocumentsDirectory();
  final fileName = 'qr_code.png'; // 自定义文件名
  final savedImage = await imageFile.copy('${appDir.path}/$fileName');
  // 保存成功，可以使用savedImage路径进行后续操作
}

// 在getImageFromCamera或getImageFromGallery方法中获取到图像后调用
await saveImage(File(pickedFile.path));