bug: Scan QrCode doesn't work on Samsung A23

[JamesDAdams]

Plugin(s)

• [X] Barcode Scanning
• [ ] Face Detection
• [ ] Face Mesh Detection
• [ ] Selfie Segmentation
• [ ] Translation

Version

5.4.0

Platform(s)

• [X] Android
• [ ] iOS
• [ ] Web

Current behavior

With a Samsung A23 the scan doesn't work (Nothing append)

Expected behavior

qrcode scan work with the Samsung A23

Reproduction

https://github.com/capawesome-team/.capacitor-app

Steps to reproduce

1. Try to scan a QRcode with a Samsung A23

Other information

My code :

  async scanCode() {
    await BarcodeScanner.requestPermissions();

    const data = await BarcodeScanner.isGoogleBarcodeScannerModuleAvailable();

    if (data.available) {
      const code = await this.startScanner();
      this.importerService.generateDossierFromQRCode(code);
    } else {
      try {
        await BarcodeScanner.installGoogleBarcodeScannerModule();
        const code = await this.startScanner();
        this.importerService.generateDossierFromQRCode(code);
      } catch (e) {
        await this.ui.alertSimple(
          "ERROR"
        );
      }

    }
  }
  
    async startScanner() {
    const { barcodes } = await BarcodeScanner.scan({
      formats: [BarcodeFormat.QrCode, BarcodeFormat.Ean13]
    });
    return barcodes;
  }

  async requestPermissions(): Promise<boolean> {
    const { camera } = await BarcodeScanner.requestPermissions();
    return camera === 'granted' || camera === 'limited';
  }

Capacitor doctor

💊 Capacitor Doctor 💊

Latest Dependencies:

@capacitor/cli: 5.7.4 @capacitor/core: 5.7.4 @capacitor/android: 5.7.4 @capacitor/ios: 5.7.4

Installed Dependencies:

@capacitor/ios: not installed @capacitor/cli: 5.6.0 @capacitor/core: 5.6.0 @capacitor/android: 5.6.0

[success] Android looking great! 👌

Before submitting

• [X] I have read and followed the bug report guidelines.
• [X] I have attached links to possibly related issues and discussions.
• [X] I understand that incomplete issues (e.g. without reproduction) are closed.

[JamesDAdams]

Someone have a same problem with the same phone with another plugin : https://github.com/juliansteenbakker/mobile_scanner/issues/698

[JamesDAdams]

After few test the scan work if the qrcode is not center Ex :

[JamesDAdams]

the getMaxZoomRatio doesn't work for my devices

Sending plugin error: {"save":false,"callbackId":"90822309","pluginId":"BarcodeScanner","methodName":"getMaxZoomRatio","success":false,"error":{"message":"There is no active scan session."}}

[robingenz]

Thank you for creating the bug report. Unfortunately, I don't have access to this device. Feel free to submit a PR.

[JamesDAdams]

Thank you for creating the bug report. Unfortunately, I don't have access to this device. Feel free to submit a PR.

There another probleme i have this error for all my phone : There is no active scan session.

Impossible to change the ratio

[JamesDAdams]

For example GetMaxZoomRatioResult work after the qrcode has been scanned...

[robingenz]

Please create a separate issue for that.

[Webrow]

We are running into this issue as well, looking at other threads it might have to do with a couple of things: 1, That phone uses android new image format NV21, 2, People report setting a custom resolution to the underlying controller solves the issue 3, ml-kit repo reports having done a pr which solves this issue.

I am willing to put some work into this, but it looks like this library is just a java wrapper on top of the ml-kit (I am not familliar with it), and the methods show do not have access to setting the resolution.

Steps would be to detect what kind of platform is being used, based on that use BGR888 (ios) or Yuv420/Nv21 (android). I have no background into imageprocessing except for my courses in uni, and I dont know how they are handled on android. If someone can get me some pointers, I am okay with walking the mile.

Ionic seems to have a new plugin as well (or Outsystems). It doesn't seem to be open (but I do see all collaborators are Ionic based). I don't know if they have the same issue yet.

[Rdevc]

After few test the scan work if the qrcode is not center Ex :

Do you get the impression that this is caused by the phone using the wrong camera? In the other issue you mentioned, there is talk about 4 cameras. I am not familiar with the code of this plugin, but I can imagine that the zoom level determines which camera is used, hence it seems like the QR code is not centered. What happens if you lower or increase the zoom ratio?

[orl99]

is there any news about this issue?

[sake12]

Probably won't be fixed because the author doesn't have that device, so he cannot reproduce the error. I just switched to the official plugin, works great, superfast, and you don't have to provide additional CSS and HTML to make it work.

[ramisalminen]

I also received a report that this is happening with Samsung A23 device. I don't have access to the device. Has anyone found out anything more about this? Is "not centering" the QR code actually working that it reads it every time?

[cbandav]

Hi,

we build a solution to set the imanageAnalysis resolution in this plugin. That way we're able to set it to 640x480 for this device, and it works fine... already using it in production.

Always ugly to have a device specific custom solution, but also the flutter and react native community use this approach, and it's a very specific problem with one of the cameras of this phone.

#220 contains a similar solution and our first test also seem to work. It's already merged in the next version.

Hope this helps.