qrcode_flutter

RoadMap

• add annotation
• support Flutter Web

introduce

pub.dev

Flutter plugin for scanning QR codes.You can customize your page by using PlatformView.Scanning Picture from path(photo album).

You can download flutter_demo.apk for testing

Usage

class _MyAppState extends State<MyApp> {
  QRCaptureController _controller = QRCaptureController();

  bool _isTorchOn = false;

  @override
  void initState() {
    super.initState();

    _controller.onCapture((data) {
      print('$data');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('scan'),
          actions: <Widget>[
            FlatButton(
              onPressed: () async {
                PickedFile image =
                    await ImagePicker().getImage(source: ImageSource.gallery);
                var qrCodeResult =
                    await QRCaptureController.getQrCodeByImagePath(image.path);
                setState(() {
                  _captureText = qrCodeResult.join('\n');
                });
              },
              child: Text('photoAlbum', style: TextStyle(color: Colors.white)),
            ),
          ],
        ),
        body: Stack(
          alignment: Alignment.center,
          children: <Widget>[
            QRCaptureView(controller: _controller),
            Align(
              alignment: Alignment.bottomCenter,
              child: _buildToolBar(),
            )
          ],
        ),
      ),
    );
  }

  Widget _buildToolBar() {
    return Row(
          mainAxisSize: MainAxisSize.max,
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            FlatButton(
              onPressed: () {
                _controller.pause();
              },
              child: Text('pause'),
            ),
            FlatButton(
              onPressed: () {
                if (_isTorchOn) {
                  _controller.torchMode = CaptureTorchMode.off;
                } else {
                  _controller.torchMode = CaptureTorchMode.on;
                }
                _isTorchOn = !_isTorchOn;
              },
              child: Text('torch'),
            ),
            FlatButton(
              onPressed: () {
                _controller.resume();
              },
              child: Text('resume'),
            )
          ],
        );
  }
}

Integration

iOS

To use on iOS, you must add the following to your Info.plist

<key>NSCameraUsageDescription</key>
<string>Camera permission is required for qrcode scanning.</string>
<key>io.flutter.embedded_views_preview</key>
<true/>