如何在flutter中保存两种不同大小的图像

dependencies:
  flutter:
    sdk: flutter
  image_picker: ^0.8.4+4

import 'package:image_picker/image_picker.dart';

final picker = ImagePicker();

Future<void> pickImageFromGallery() async {
  final pickedFile = await picker.getImage(source: ImageSource.gallery);
  // 处理选择的图像
}

Future<void> captureImageFromCamera() async {
  final pickedFile = await picker.getImage(source: ImageSource.camera);
  // 处理拍摄的图像
}

import 'dart:io';

Future<void> saveImage(File image, String fileName) async {
  final directory = await getApplicationDocumentsDirectory();
  final filePath = '${directory.path}/$fileName';
  await image.copy(filePath);
  // 图像保存成功
}

Future<void> pickImageFromGallery() async {
  final pickedFile = await picker.getImage(source: ImageSource.gallery);
  if (pickedFile != null) {
    final image = File(pickedFile.path);
    await saveImage(image, 'large_image.jpg');
    // 保存大图像
  }
}

Future<void> captureImageFromCamera() async {
  final pickedFile = await picker.getImage(source: ImageSource.camera);
  if (pickedFile != null) {
    final image = File(pickedFile.path);
    await saveImage(image, 'small_image.jpg');
    // 保存小图像
  }
}