ZXing Result.getRawBytes(), what exactly is it?

Question

I\'m working with the zxing QR code APIs, and I\'m trying to extract binary data from a QR code on an android device. However, on android, Result.getResultMetadata() isn\'t

Answer 1

Why not start with the javadoc?

It is the raw codewords in the QR code. It is not the individual parsed byte segments.

Answer 2

So what i think you want is the raw, decoded data in a byte array. The intent source that zxing gives you is missing the metadata, but it's still being sent to the intent filter.

In parseActivityResult inside of IntentIntegrator.java, you can add:

byte[] dataBytes = intent.getByteArrayExtra("SCAN_RESULT_BYTE_SEGMENTS_0");
return new IntentResult(contents,
                        formatName,
                        rawBytes,
                        orientation,
                        errorCorrectionLevel,
                        dataBytes);

I modified the IntentResult class to be able to take this extra piece:

private final byte[] dataBytes;

IntentResult() {
    this(null, null, null, null, null, null);
}

IntentResult(String contents,
           String formatName,
           byte[] rawBytes,
           Integer orientation,
           String errorCorrectionLevel,
           byte[] dataBytes) {
    this.contents = contents;
    this.formatName = formatName;
    this.rawBytes = rawBytes;
    this.orientation = orientation;
    this.errorCorrectionLevel = errorCorrectionLevel;
    this.dataBytes = dataBytes;
}


/**
* @return raw content of barcode in bytes
*/

public byte [] getDataBytes() {
  return dataBytes;
}

This byte array stores the first array of the metadata, AKA the raw contents of your data in bytes.