Flutter在上传到firebase之前调整ImagePicker图像的大小

dependencies:
  flutter:
    sdk: flutter
  image_picker: ^0.8.4+4
  firebase_storage: ^10.0.3

import 'package:image_picker/image_picker.dart';

final picker = ImagePicker();

Future<void> pickAndUploadImage() async {
  final pickedFile = await picker.pickImage(source: ImageSource.gallery);
  if (pickedFile != null) {
    // 图像选择成功，继续下一步操作
    // 调整图像大小并上传到Firebase
    resizeAndUploadImage(File(pickedFile.path));
  }
}

import 'package:image/image.dart' as img;

void resizeAndUploadImage(File imageFile) {
  final image = img.decodeImage(imageFile.readAsBytesSync());
  final resizedImage = img.copyResize(image, width: 500, height: 500);
  
  // 上传调整后的图像到Firebase
  uploadImageToFirebase(resizedImage);
}

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

Future<void> uploadImageToFirebase(img.Image image) async {
  final storageRef = firebase_storage.FirebaseStorage.instance.ref().child('images');
  final imageBytes = img.encodePng(image);
  
  final uploadTask = storageRef.putData(imageBytes);
  final snapshot = await uploadTask.whenComplete(() {});
  
  if (snapshot.state == firebase_storage.TaskState.success) {
    // 图像上传成功
    final downloadUrl = await snapshot.ref.getDownloadURL();
    print('图像上传成功，下载链接：$downloadUrl');
  } else {
    // 图像上传失败
    print('图像上传失败');
  }
}