How to get a dart:ui Image from an internet image?

I am trying to insert an image from the internet to my project, but I want it to always be cropped to the same size so that there is never an OveriSze.

I found a github post by @diegodeveloper about image cropping in Flutter where you use a . The truth is that I did not understand the code 100%, but I think I understood more or less what each line does and I tried to implement it, but this time with a . However this does not work.CustomPainterAssetImageNetworkImage

I understand that this function sets the package property _image( property of the StateFulWidget where the function is located ) , but instead sets it to , causing no image to be displayed where it should be. What is the mistake? (If I try it with a instead of a it keeps assigning )Imagedart:uinullAssetImageNetworkImagenull

 Future<void> _loadImage()async{
        final networkImage = NetworkImage(widget.product.media[0]);
        final imageKey = await networkImage.obtainKey(const ImageConfiguration());
        final DecoderCallback decodeResize = (Uint8List bytes, {bool? allowUpscaling, int? cacheWidth, int? cacheHeight}) {
          return ui.instantiateImageCodec(bytes,targetHeight: cacheHeight, targetWidth: cacheWidth);
        };
        var load = networkImage.load(imageKey, decodeResize);
    
        ImageStreamListener listener = ImageStreamListener((info, err) async {
          setState(() {
            _image = info.image;
          });
        });
            load.addListener(listener);
    }

This is another attempt I made to get the ui.Imagebut it also sets null:

Future<void> getImage(String path) async {
  var completer = Completer<ImageInfo>();
  var img = new NetworkImage(path);
  img.resolve(const ImageConfiguration()).addListener(ImageStreamListener((info, _) {
    completer.complete(info);
  }));
  ImageInfo imageInfo = await completer.future;
  _image = imageInfo.image;
}

This is where I assign the value returned by the functions to the property _image:

@override
void initState(){
    // _loadImage();
    // getImage(widget.product.media[0]);
    super.initState();
}