在PreviewFrame上使用Zxing Library来增强现实

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.

有人能告诉我如何使用Zxing Library增强现实应用程序吗？我知道使用Zxing的最简单的方法是通过Intent，但我需要Camera View，所以我不能使用条形码应用程序。

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

我有一个SurfaceHolder.Callback，它被添加到主活动并覆盖以下方法：

@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().

设置的图片大小必须可用，因为它在list.getSupportedPictureSizes（）列表中。

And this method in the QrCodeReader class which implements PreviewCallback:

而这个方法在QrCodeReader类中实现了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.

Logcat仅显示NotFoundException。

1 个解决方案

#1

NotFoundException is normal. If the frame doesn't have a barcode, that's the result. This doesn't mean anything is wrong per se. Keep scanning.

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。