Imagepicker 'XFile' is not a subtype of type 'File' in type cast and Firebase Storage image upload error

Question

I am trying to select image from gallery with imagepicker and upload it to firebasestorage. When the application runs, it gives the error "Cannot open file, path = '' (OS Error: Bad address, errno = 14) and Unhandled Exception: type 'XFile' is not a subtype of type 'File' in type cast'.

GestureDetector(
                  onTap: () => pickPhotoFromGallery(),
                  child: CircleAvatar(
                    radius: 70,
                    // ignore: unnecessary_null_comparison
                    child: (_imageFile != null)
                        ? Image.file(_imageFile)
                        : Image.asset('assets/images/icon.png'),
                  ),
                ),

Future pickPhotoFromGallery() async {
    File imageFile =
        (await _imagePicker.pickImage(source: ImageSource.gallery)) as File;

    setState(() {
      _imageFile = imageFile;
    });
  }

When I click the save button, it says "Failed assertion: line 127 pos 12: 'file.absolute.existsSync()': is not true." I am encountering the error.

onPressed: uploading ? null : () => uploadImageAndSaveItemInfo(),

  uploadImageAndSaveItemInfo() async {
    setState(() {
      uploading = true;
    });

    String imageDownloadUrl = await uploadItemImage(_imageFile);

    saveItemInfo(imageDownloadUrl);
    saveItemInfoCategory(imageDownloadUrl);
  }


  Future<String> uploadItemImage(File mFileImage) async {
    final Reference storageReference =
        FirebaseStorage.instance.ref().child("thumbnail");

    UploadTask uploadTask = storageReference
        .child(_idController.text.trim() + ".jpg")
        .putFile(mFileImage);

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

Imagepicker was working in old versions, it gives an error in the latest version.

Solution

The reason for this is that the image picker was upgraded to use Xfile instead of File. To convert Xfile to File you can use:

File file = File( _imageFile.path );

You will need to add import 'dart:io' as well.