Scan Only 1 Barcode

[parmarjitesh]

I Am Trying to Scan Only 1 Barcode at at time like other packages like flutter_barcode_scanner. Scan 1 barcode process the Result and than scan again. Navigator.pop(context); is behaving abnormally in the onDetect Function. Its gets back 2-3 times or even goes to the start of the app. Tweaking some code below caused debuglocked error

Kindly Help me about how to achieve the above ?

onDetect: (barcode, args) { if (barcode.rawValue == null) { debugPrint('Failed to scan Barcode'); } else { final String code = barcode.rawValue!; debugPrint('Barcode found! $code');

        Future.delayed(const Duration(seconds: 2), () {
          Navigator.pop(context);
        });
      }
    },

[parmarjitesh]

Can Any 1 Help ?

[cgutierr-zgz]

Hi @parmarjitesh I'm assuming u have allowDuplicates set to true. I also use it that way since I might want to scan a QR code twice.

To prevent the scanner from getting the same value over and over you could add a debounce to the onDetect function.

In my case I have something like this:

MobileScanner(
    allowDuplicates: true,
    controller: controller,
    onDetect: (barcode, args) => isEnabled.value ? _onDetect(/*My args here*/) : null,
...

_onDetect(/*My args here*/){
    isEnabled.value = false;
    // ... my code to run
    timer = Timer(
      const Duration(seconds: 3),
      () => isEnabled.value = true,
    );
}

Hope it helps :)