Question 200239 in Flutter Question posted in
The official Flutter documentation can be found here.

How to scan barcode in flutter?

i am having trouble with the barcode scanner. someone please help

i don’t know if this is the correct way but this is the code i gave for button.

Row(
        children:
        [const Padding(padding: EdgeInsets.only(right: 10)),
          const Text('Barcode',style:
          TextStyle(fontSize: 20,
              fontWeight: FontWeight.bold,
              color: Colors.deepOrange),
          ),
      const Padding(padding: EdgeInsets.only(right: 100)),
          IconButton(
            icon: const Icon(Icons.qr_code),
            onPressed: () {
              scanBarcode();
            },
          ),
          const Text('Scan Code',style:
          TextStyle(fontSize: 15,fontWeight: FontWeight.bold,),),
        ],
      ),
Tags:

3

Answers


  2. 0

    To scan barcodes in Flutter, you can make use of the barcode_scan package, which provides a simple and convenient way to integrate barcode scanning functionality into your Flutter app. Here’s how you can implement barcode scanning using this package:

    Add the barcode_scan package to your pubspec.yaml file:

    dependencies:
  barcode_scan: ^2.0.0

    Import the necessary package in your Dart file:
    dart

    import 'package:barcode_scan/barcode_scan.dart';
import 'package:flutter/services.dart';

    Implement the barcode scanning functionality in a method:
    dart
    Copy code

    Future<void> scanBarcode() async {
  try {
    ScanResult result = await BarcodeScanner.scan();
    String barcode = result.rawContent;
    
    // Handle the scanned barcode
    print('Scanned barcode: $barcode');
  } on PlatformException catch (e) {
    if (e.code == BarcodeScanner.cameraAccessDenied) {
      // Handle camera permission denied error
      print('Camera permission denied');
    } else {
      // Handle other platform exceptions
      print('Error: ${e.message}');
    }
  } catch (e) {
    // Handle other exceptions
    print('Error: $e');
  }
}

    Trigger the barcode scanning process by calling the scanBarcode method:
    dart

    scanBarcode();

    When you call scanBarcode, it will open the device’s camera to scan for a barcode. Once a barcode is scanned, the result will be returned as a ScanResult object, which contains the raw content of the barcode. You can then handle the scanned barcode as needed.

    Make sure to handle exceptions and error cases, such as camera permission denial, by using try-catch blocks and handling specific exceptions.

    Note: The barcode_scan package supports various barcode formats, including QR codes, UPC codes, EAN codes, and more.

    Login or Signup to reply.
  3. 0

    In the terminal type: "flutter pub add flutter_barcode_scanner" and hit enter.

    Then add those codes outside the build method:

      Future<void> scanBarcodeNormal() async {
String barcodeScanRes;

// Platform messages may fail, so we use a try/catch PlatformException.
try {
  barcodeScanRes = await FlutterBarcodeScanner.scanBarcode(
      '#ff6666', 'Cancel', true, ScanMode.BARCODE);
  print(barcodeScanRes);
} on PlatformException {
  barcodeScanRes = 'Failed to get platform version.';
}

// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;

setState(() {
  _scanBarcode = barcodeScanRes;
});}

    Then implement any button to start the scanner:

    IconButton(
                icon: Icon(
                  Icons.qr_code_2,
                  color: Colors.black,
                  size: 40,
                ),
                onPressed: () => scanBarcodeNormal(),
              ),

    You are ready to go.

    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search