scan inverted custom view

[openmotion]

Description of the problem:

with a custom view i cannot scan inverted qrcode

` barcodeScannerView = findViewById(R.id.zxing_barcode_scanner);

    CameraSettings settings = new CameraSettings();
    settings.setScanInverted(true);
    
   barcodeScannerView.setCameraSettings(settings);


    barcodeScannerView.setTorchListener(this);

    barcodeScannerView.getCameraSettings().setScanInverted(true);

    barcodeScannerView.getCameraSettings().setExposureEnabled(true);


    barcodeScannerView.initializeFromIntent(getIntent());


    Collection<BarcodeFormat> formats = Arrays.asList(BarcodeFormat.QR_CODE, BarcodeFormat.CODE_39);
    barcodeScannerView.setDecoderFactory(new DefaultDecoderFactory(formats));


    barcodeScannerView.decodeContinuous(callback);

    switchFlashlightButton = findViewById(R.id.switch_flashlight);
    viewfinderView = findViewById(R.id.zxing_viewfinder_view);

    // if the device does not have flashlight in its camera,
    // then remove the switch flashlight button...
    if (!hasFlash()) {
        switchFlashlightButton.setVisibility(View.GONE);
    }

    capture = new CaptureManager(this, barcodeScannerView);`

Which library version are you using? E.g. 3.2.0.
implementation('com.journeyapps:zxing-android-embedded:4.2.0') { transitive = false }
implementation 'com.google.zxing:core:3.3.0'

Which phone/tablet are you using, and which Android version does it run? (e.g. Samsung Galaxy S5,
Android 5.0)
android 10
Does the same happen on other devices or an emulator?
don't know
Can you reproduce the issue in the sample project included with the library? If not, can you
provide your own sample project or sample code that produces this error?

In the case of an error do you have a stack trace or adb logs?

[saba7afi]

any update please, I've the same issue.

[rkistner]

Need more details here.

Does it work in the sample app (https://github.com/journeyapps/zxing-android-embedded/releases/tag/v4.3.0), but not with a custom view? Or not at all?

Do you have a sample of a barcode that fails to scan?

Are there any errors, or does it just not detect the barcode?

[openmotion]

the sample app doesn"t have the custom example with the inverted option

[rkistner]

CameraSettings#setScanInverted(true) sets the camera preview to be inverted, which is not supported on all devices, and is not ideal.

Instead, you should set the scan type on DefaultDecoderFactory to INVERTED_SCAN (always inverted) or MIXED_SCAN (alternates between normal and inverted):

new DefaultDecoderFactory(formats, null, null, Intents.Scan.MIXED_SCAN);

[saba7afi]

Thanks @rkistner, it's works now