Implementing Google Vision API with Flutter - flutter

Question

I'm unsure of how to incorporate this into an existing flutter project and I haven't been able to find any useful guides or tips online. Im looking to implement a 2D only barcode scanner, and none of the existing flutter barcode scanners have that option.
I know ZXing also has the 2d only functionality in it so I could be swayed to use that if anyone can point me in the direction of how to implement them in flutter

Answer 1

Please check this url
https://pub.dartlang.org/packages/qrcode_reader
Here is implementation code
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:qrcode_reader/QRCodeReader.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'QRCode Reader Demo',
home: new MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
final Map<String, dynamic> pluginParameters = {
};
#override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
Future<String> _barcodeString;
#override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: const Text('QRCode Reader Example'),
),
body: new Center(
child: new FutureBuilder<String>(
future: _barcodeString,
builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
return new Text(snapshot.data != null ? snapshot.data : '');
})),
floatingActionButton: new FloatingActionButton(
onPressed: () {
setState(() {
_barcodeString = new QRCodeReader()
.setAutoFocusIntervalInMs(200)
.setForceAutoFocus(true)
.setTorchEnabled(true)
.setHandlePermissions(true)
.setExecuteAfterPermissionGranted(true)
.scan();
});
},
tooltip: 'Reader the QRCode',
child: new Icon(Icons.add_a_photo),
),
);
}
}

Answer 2

This can be done by using flutter barcode_scan dependency.
Future _openQRScanner() async {
try {
// Below code will open camera preview and return result after qr scan
String _content = await BarcodeScanner.scan();
setState(() => this._content = _content);
} on PlatformException catch (e) {
if (e.code == BarcodeScanner.CameraAccessDenied) {
showSnackBar('Please grant camera permission!');
setState(() {
this._content = null;
});
} else {
showSnackBar('Error: $e');
setState(() {
this._content = null;
});
}
} on FormatException {
showSnackBar('User pressed "back" button before scanning');
setState(() {
this._content = null;
});
} catch (e) {
showSnackBar('Error: $e');
setState(() {
this._content = null;
});
}
}
Please find the repo.
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