Scan and Decode QR-Code

MyActivity.java

public void takeQrCodePicture() {
    IntentIntegrator integrator = new IntentIntegrator(this);
    integrator.setCaptureActivity(MyCaptureActivity.class);
    integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
    integrator.setOrientationLocked(false);
    integrator.addExtra(Intents.Scan.BARCODE_IMAGE_ENABLED, true);
    integrator.initiateScan();
}
    
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == IntentIntegrator.REQUEST_CODE 
        && resultCode == RESULT_OK) {

        Bundle extras = data.getExtras();
        String path = extras.getString(
            Intents.Scan.RESULT_BARCODE_IMAGE_PATH);
        
        // Ein Bitmap zur Darstellung erhalten wir so:
        // Bitmap bmp = BitmapFactory.decodeFile(path)
        
        String code = extras.getString(
            Intents.Scan.RESULT);
    }
}