Creating a barcode and QR code scanner in a Flutter app

by Manish Patel Power Platform & Mobile App

Flutter is a popular open-source framework for building cross-platform mobile apps. As a leading flutter app development company, we understand the importance of providing efficient and user-friendly features in mobile apps. One of the many features that Flutter provides is the ability to easily add a barcode and QR code scanner to your app. In this blog post, we will show you how to use a popular package called "barcode_scan" to create a simple and efficient barcode scanner in a Flutter app. This feature can enhance the user experience, adding a new level of convenience for scanning barcodes and QR codes in your app. As a flutter app development company, we are committed to delivering high-quality apps that are tailored to the specific needs of our clients.

Step to Creating a Barcode and QR Code Scanner in a Flutter App

Flutter is a popular open-source framework for building cross-platform mobile apps. One of the many features that Flutter provides is the ability to easily add a barcode and QR code scanner to your app. In this blog post, we will show you how to use a popular package called "barcode_scan" to create a simple and efficient barcode scanner in a Flutter app.

First, you will need to add the "barcode_scan" package as a dependency in your pubspec.yaml file. This is the file that lists all the packages that your app uses. To add the package, simply add the following line to the dependencies section:

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dependencies:

barcode_scan: ^1.0.0

Next, you can import the package and use the BarcodeScanner.scan method to start a scan. The method takes a callback function that will be executed when a barcode or QR code is successfully scanned. The callback function receives a ScanResult object, which contains the data of the scanned code.

Here is an example of how to use the package to create a basic barcode scanner:

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import 'package:flutter/material.dart';

import 'package:barcode_scan/barcode_scan.dart';

class BarcodeScannerPage extends StatefulWidget {

@override

_BarcodeScannerPageState createState() => _BarcodeScannerPageState();

}

class _BarcodeScannerPageState extends State<BarcodeScannerPage> {

String _barcode = '';

Future _scanBarcode() async {

try {

var result = await BarcodeScanner.scan();

setState(() => _barcode = result.rawContent);

} catch (e) {

print(e);

}

@override

Widget build(BuildContext context) {

return Scaffold(

appBar: AppBar(

title: Text('Barcode Scanner'),

body: Center(

child: Column(

mainAxisAlignment: MainAxisAlignment.center,

children: <Widget>[

Text(_barcode),

RaisedButton(

child: Text('Scan'),

onPressed: _scanBarcode,

);

}

This example creates a basic barcode scanner page that displays the scanned barcode data on the screen. The _scanBarcode function is called when the "Scan" button is pressed, and it uses the BarcodeScanner.scan method to start a scan. When a barcode is successfully scanned, the callback function sets the _barcode variable to the scanned data, and the build method updates the UI to display the scanned data.

In this example, the BarcodeScanner.scan method is wrapped in a try-catch block to handle any errors that may occur during the scan. The ScanResult object returned by the method also contains other information about the scanned code, such as the type of code and the format of the data. You can use this information to customize the

Conclusion

In conclusion, creating a barcode and QR code scanner in a Flutter app is a simple and efficient process. By using the "barcode_scan" package, developers can easily add this feature to their app with minimal code. This feature can enhance the user experience, adding a new level of convenience for scanning barcodes and QR codes in your app. As a flutter app development company, we are dedicated to providing our clients with the latest and most efficient features in mobile app development. We hope this blog post has given you a better understanding of how to create a barcode and QR code scanner in a Flutter app.