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Can someone tell me how I can use the Zxing Library for an Augmented Reality App? I know the easiest way to use Zxing is via Intent, but I need the Camera View so I can not use the barcode App.

I have a SurfaceHolder.Callback which is added to the main activity and overwrites following method:

@Override
public void surfaceCreated(SurfaceHolder holder) {
    mCamera = Camera.open();

    try {
        mCamera.setPreviewDisplay(holder);
    } catch (IOException e) {
        Log.d(TAG, "Can not set surface holder");
    }

    mCamera.startPreview();

    Parameters parameters = mCamera.getParameters();
    parameters.setPreviewSize(1280, 720);
    parameters.setPictureSize(1280, 720);
    mCamera.setParameters(parameters);

    QrCodeReader reader = new QrCodeReader();
    mCamera.setPreviewCallback(reader);
}

The setted picture size has to be available because it is in the list parameters.getSupportedPictureSizes().

And this method in the QrCodeReader class which implements PreviewCallback:

private Result result;
private MultiFormatReader reader = new MultiFormatReader();
private boolean init = false;

public QrCodeReader(){
        Hashtable<DecodeHintType, Object> hints = new Hashtable<DecodeHintType,
              Object>();
    hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);
    reader.setHints(hints);
}

@Override
public void onPreviewFrame(byte[] data, Camera camera) {
    PlanarYUVLuminanceSource source = new PlanarYUVLuminanceSource(data,
          1280, 720, 0, 0, 1280, 720, true);
    HybridBinarizer hybBin = new HybridBinarizer(source);
    BinaryBitmap bitmap = new BinaryBitmap(hybBin);

try {
        result = reader.decodeWithState(bitmap);
        Log.d("Result", "Result found!");
    } catch (NotFoundException e) {
        Log.d(TAG, "NotFoundException");
    } finally {
        reader.reset();
    }
}

The Logcat only shows NotFoundException.

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1 回答 1

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NotFoundException是正常的。如果框架没有条形码，那就是结果。这并不意味着任何事情本身都是错误的。继续扫描。

于 2012-12-02T13:34:42.987 回答