file - 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...

      final ByteData bytes = await rootBundle.load('assests/logo');
      final Uint8List list = bytes.buffer.asUint8List();

      final tempDir = await getTemporaryDirectory();
      final file = await new File('${tempDir.path}/image.jpg').create();
      file.writeAsBytesSync(list);

How can I do this with Image.network(imageUrl.com/image)

Answer 1

The simplest way seeems to get the http response using the image url and response.bodyBytes would contain the data in Uint8List.

http.Response response = await http.get(
    'https://flutter.io/images/flutter-mark-square-100.png',
);   
response.bodyBytes //Uint8List

Now you can do things like converting to base64 encoded string base64.encode(response.bodyBytes);
Update: With newer version of http, you need to add Uri.parse()
Eg.

http.Response response = await http.get(
    Uri.parse('https://flutter.io/images/flutter-mark-square-100.png'),
);