Is there a way to scan barcodes in Flutter?

I'm working on something currently as a companion to my QR generation plugin (https://github.com/lukef/qr.flutter) but I don't have a specific timeline, unfortunately.

My plan is to use the Texture object and hookup a camera (or fork / use the camera plugin) and then use the Google Vision API (https://developers.google.com/vision/android/barcodes-overview).

It should be decently trivial, I just need to find the time. Either way, that was the plan if you want to do it :)

I've previously had a similar problem, and after searching as you did I didn't find a whole lot. I decided that the best approach would be to write a plugin myself... so shameless plug for my plugin here =D, not that I benefit from anyone else using it at all.

You can see it here. However, I haven't had time to document it, test it all that extensively, or publish it properly on Pub. So your mileage may vary. It should however work on android 4.4+ (and maybe below), and iOS devices that flutter supports. I also haven't tested it in conjunction with the Camera plugin but I don't see why it would have a problem with it.

It takes a different approach than most of the other qr code plugins; instead of making an android or iOS window, doing the scan, then returning to flutter, it uses flutter's texture rendering capabilities to have the camera render directly into flutter.

A few more things to consider are that it uses the Google Mobile Vision SDK with the applicable licensing and capabilities that comes along with that (and requires a recent version of Play Services on Android); and that it currently only supports the most basic extraction of information from barcode scans - I only needed the raw text out so that's all I did.

To use it, add this to your pubspec.yaml:

dependencies:
  qr_mobile_vision: '^0.0.7'

And implement as follows:

import 'package:qr_mobile_vision/QrCamera.dart';

...

new Container(
  constraints: new BoxConstraints.loose(
  new Size(cameraSize, cameraSize)),
  child: new QrCamera(
    qrCodeCallback: (code) {
      print(code);
    }
  ),
)

I do plan on finishing documentation/testing/etc eventually, but you're welcome to try it out in the meantime. If you decide to use it and need a feature it doesn't support I may be able to help implement it... but PRs are welcome and encouraged!

UPDATE: this does include Barcode support now. You can pass in which types of QR code / Barcode you want to support when you instantiate QrCamera. It defaults to all, which takes more processing so if you're after a certain type it's recommended that you pass it in.