HOW TO SCAN QR CODE WITH FLUTTER

HOW TO SCAN QR CODE WITH FLUTTER

In This post learn How to Scan QR CODE in Flutter

 

Step 1:
Create Flutter Application

Step 2: Add dependencies 
Add below dependency in pubspec.yaml file

 

dependencies:
  flutter:
    sdk: flutter
  qrcode: ^1.0.4

 

 

Step 3: Add below code in respected dart file

import 'package:flutter/material.dart';
import 'package:qrcode/qrcode.dart';
void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        debugShowCheckedModeBanner: false,
        title: 'Flutter QR Code Scanner',
        theme: new ThemeData(primarySwatch: Colors.red),
    home: new ScanQRCode());
  }
}

class ScanQRCode extends StatefulWidget {
  @override
  _ScanQRCodState createState() => _ScanQRCodState();
}

class _ScanQRCodState extends State<ScanQRCode> {
  QRCaptureController _captureController = QRCaptureController();

  bool _isTorchOn = false;

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

    _captureController.onCapture((data) {
      print('onCapture----$data');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Stack(
          alignment: Alignment.center,
          children: <Widget>[
            QRCaptureView(controller: _captureController),
            Align(
              alignment: Alignment.bottomCenter,
              child: _buildToolBar(),
            )
          ],
        ),
      ),
    );
  }

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

HOW TO SCAN QR CODE WITH FLUTTER

In This post learn How to Scan QR CODE in Flutter

 

Step 1:
Create Flutter Application

Step 2: Add dependencies 
Add below dependency in pubspec.yaml file

 

dependencies:
  flutter:
    sdk: flutter
  qrcode: ^1.0.4

 

 

Step 3: Add below code in respected dart file

import 'package:flutter/material.dart';
import 'package:qrcode/qrcode.dart';
void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        debugShowCheckedModeBanner: false,
        title: 'Flutter QR Code Scanner',
        theme: new ThemeData(primarySwatch: Colors.red),
    home: new ScanQRCode());
  }
}

class ScanQRCode extends StatefulWidget {
  @override
  _ScanQRCodState createState() => _ScanQRCodState();
}

class _ScanQRCodState extends State<ScanQRCode> {
  QRCaptureController _captureController = QRCaptureController();

  bool _isTorchOn = false;

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

    _captureController.onCapture((data) {
      print('onCapture----$data');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Stack(
          alignment: Alignment.center,
          children: <Widget>[
            QRCaptureView(controller: _captureController),
            Align(
              alignment: Alignment.bottomCenter,
              child: _buildToolBar(),
            )
          ],
        ),
      ),
    );
  }

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

HOW TO SCAN QR CODE WITH FLUTTER

In This post learn How to Scan QR CODE in Flutter

 

Step 1:
Create Flutter Application

Step 2: Add dependencies 
Add below dependency in pubspec.yaml file

 

dependencies:
  flutter:
    sdk: flutter
  qrcode: ^1.0.4

 

 

Step 3: Add below code in respected dart file

import 'package:flutter/material.dart';
import 'package:qrcode/qrcode.dart';
void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        debugShowCheckedModeBanner: false,
        title: 'Flutter QR Code Scanner',
        theme: new ThemeData(primarySwatch: Colors.red),
    home: new ScanQRCode());
  }
}

class ScanQRCode extends StatefulWidget {
  @override
  _ScanQRCodState createState() => _ScanQRCodState();
}

class _ScanQRCodState extends State<ScanQRCode> {
  QRCaptureController _captureController = QRCaptureController();

  bool _isTorchOn = false;

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

    _captureController.onCapture((data) {
      print('onCapture----$data');
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Stack(
          alignment: Alignment.center,
          children: <Widget>[
            QRCaptureView(controller: _captureController),
            Align(
              alignment: Alignment.bottomCenter,
              child: _buildToolBar(),
            )
          ],
        ),
      ),
    );
  }

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

 

Let's run the application and scan any QR Code, in the console it will print scanned QR code data like below

I/flutter (12900): onCapture----http://www.youtube.com/watch?v=S5KafuOcyn4

 

Flutter QR Code Scanner

Flutter QR Scanner

 

Let's run the application and scan any QR Code, in the console it will print scanned QR code data like below

I/flutter (12900): onCapture----http://www.youtube.com/watch?v=S5KafuOcyn4

 

Flutter QR Code Scanner

Flutter QR Scanner

 

Let's run the application and scan any QR Code, in the console it will print scanned QR code data like below

I/flutter (12900): onCapture----http://www.youtube.com/watch?v=S5KafuOcyn4

 

Flutter QR Code Scanner

Flutter QR Scanner