Flutter The argument type 'File?' can't be assigned to the parameter type 'File'

Question

I am using image picker I need to store the image in the file so can show.

I am doing like this

  final ImagePicker _picker = ImagePicker();
  PickedFile? _imageFile;
File? imageFile;


  _imgFromCamera() async {
    final pickedFile =
        await _picker.getImage(source: ImageSource.camera, imageQuality: 50);

    setState(() {
      _imageFile = pickedFile;
          imageFile = File(pickedFile!.path);

    });
  }

  _imgFromGallery() async {
    final pickedFile =
        await _picker.getImage(source: ImageSource.gallery, imageQuality: 50);

    setState(() {
      _imageFile = pickedFile;
      imageFile = File(pickedFile!.path);

    });
  }

But when I am showing this

    Image.file(
        imageFile,
        width: 100,
        height: 100,
        fit: BoxFit.fitHeight,
      )

Its shows this error Flutter The argument type 'File?' can't be assigned to the parameter type 'File'. If I remove ? from the File so it's showing some null safety errors.

score 1 · Answer 1 · answered Sep 03 '21 at 08:46

1

Initialize the file to a new File Object. Change this

File? imageFile;

to

File imageFile=new File('');

answered Sep 03 '21 at 08:46

Sarthak Bansal

97
1
10

Tirth Patel · Answer 2 · 2021-08-08T11:21:43.447

0

Image.file needs a File, not a File?. Use a ternary operator to render Image.file:

imageFile != null ? Image.file(
  imageFile!,
  width: 100,
  height: 100,
  fit: BoxFit.fitHeight,
) : Text('imageFile is null'),

edited Aug 08 '21 at 11:21

answered Aug 08 '21 at 10:30

Tirth Patel

5,443
3
27
39

I am already showing image like this same error – rameez khan Aug 08 '21 at 10:38
which version of `image_picker` are you using? – Tirth Patel Aug 08 '21 at 10:45
1

[Non-local variables will not be automatically promoted by type checks](https://stackoverflow.com/q/65035574/). Either use a local variable or use a null-assertion (`imageFile!`) after performing a null-check. – jamesdlin Aug 08 '21 at 11:19
Thanks @jamesdlin! Updated my answer as per your suggestion. – Tirth Patel Aug 08 '21 at 11:22

Flutter The argument type 'File?' can't be assigned to the parameter type 'File'

2 Answers2