Not all QR codes are read, what is wrong?

[ignaciofatou]

Hi

Hello, in my new project with these liberias I am able to scan all the QR codes perfectly except for the one I need for my project, I have attached an image of the code, I have tried doing it with the original and I still cannot scan it. I have tried other QR code readers from the PlayStore and they read it perfectly without any problem. What is going wrong?

this is the QR image that is failing:
https://postimg.cc/CBn5FnS8

Manifest:

......
<application
...
android:hardwareAccelerated="true"
...

Grandle:
minSdk 21

compileOptions {
    coreLibraryDesugaringEnabled true
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

dependenies {
    implementation 'com.journeyapps:zxing-android-embedded:4.3.0'
    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
}

ScanActiviy.java:
barcodeLauncher.launch(new ScanOptions());

private final ActivityResultLauncher<ScanOptions> barcodeLauncher = registerForActivityResult(new ScanContract(),
        result -> {
            if(result.getContents() != null) {
               ...
               ...
            }
        });

[ignaciofatou]

    ScanOptions options = new ScanOptions();
    options.addExtra(Intents.Scan.SCAN_TYPE, Intents.Scan.INVERTED_SCAN);
    barcodeLauncher.launch(options);

private final ActivityResultLauncher<ScanOptions> barcodeLauncher = registerForActivityResult(new ScanContract(),
        result -> {
            if(result.getContents() == null) {
                Intent originalIntent = result.getOriginalIntent();
                if (originalIntent == null) {
                    Toast.makeText(MainActivity.this, "Cancelado", Toast.LENGTH_LONG).show();
                } else if(originalIntent.hasExtra(Intents.Scan.MISSING_CAMERA_PERMISSION)) {
                    Toast.makeText(MainActivity.this, "Cancelado, debe dar permisos de Cámara a la Aplicación", Toast.LENGTH_LONG).show();
                }
            }
            //Se Escaneo Correctamente el Codigo QR
            else {
              ...
            }
        });

[rkistner]

Using the INVERTED_SCAN like you have here works for me. You need it because the barcode has a white foreground on a dark background, which is non-standard.

You also need a bigger border around the barcode (although I can still scan without it).