ImageCropper use with Uint8List file -flutter-CodePudding

I'm using image_picker & ImageCropper packages. I want to save a user-given picture in firestore database. So, I use functions like this.

First, set File? _image;

Functions for cropping & picking

Future _pickImage(ImageSource source) async {
         Navigator.of(context).pop();
        try {
          final image = await ImagePicker().pickImage(source: source);
           if (image == null) return;
           File? img = File(image.path);
    img = await _cropImage(imageFile: img);
    setState(() {
      _image = img;
    });
  } on PlatformException catch (e) {
    print(e);
    Navigator.of(context).pop();
  }
}

      Future<File?> _cropImage({required File imageFile}) async {
  CroppedFile? croppedImage =
      await ImageCropper().cropImage(sourcePath: imageFile.path);
  if (CroppedFile == null) return null;
  return File(croppedImage!.path);
}

and use this to save data in firestore

Future<String> uploadImageToStorage(
    File file,
  ) async {
    file
    Reference ref =
        _storage.ref().child("profilePics").child(_auth.currentUser!.uid);

    UploadTask uploadTask = ref.putData(file);

    TaskSnapshot snap = await uploadTask;
    String downloadUrl = await snap.ref.getDownloadURL();
    return downloadUrl;
  }

Above function not work for File type data, It support for Uint8List. So, What can I do for this?

Next problem is, I'm getting File type data with ImagePicker for profile picture. Is it not problem?

CodePudding user response：

Try changing your _cropImage-Method to return XFile? like this:

Future<XFile?> _cropImage({required File imageFile}) async {
  CroppedFile? croppedImage =
      await ImageCropper().cropImage(sourcePath: imageFile.path);
  if (CroppedFile == null) return null;
  return XFile(croppedImage!.path);
}

You also have to change the paramter of uploadImageToStorage to XFile file. Then you can use file!.readAsBytes(); to get a Uint8List.

Future<String> uploadImageToStorage(
  XFile file,
) async {
  Reference ref =
      _storage.ref().child("profilePics").child(_auth.currentUser!.uid);

  final fileBytes = await file.readAsBytes();
  UploadTask uploadTask = ref.putData(fileBytes);

  TaskSnapshot snap = await uploadTask;
  String downloadUrl = await snap.ref.getDownloadURL();
  return downloadUrl;
}