How to get a Flutter Uint8List from a Network Image?

Question

I\'m trying to convert a network image into a file and the first part of that is to convert it into a Uint8List. Here is how I\'m doing this with 1 of my asset images...

Answer 1

  void initState() {
    super.initState();
    var sunImage = new NetworkImage(
        "https://resources.ninghao.org/images/childhood-in-a-picture.jpg");
    sunImage.obtainKey(new ImageConfiguration()).then((val) {
      var load = sunImage.load(val);
      load.addListener((listener, err) async {
        setState(() => image = listener);
      });
    });
  }

See also https://github.com/flutter/flutter/issues/23761#issuecomment-434606683

Then you can use image.toByteData().buffer.asUInt8List()

See also https://docs.flutter.io/flutter/dart-ui/Image/toByteData.html