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.
有人能告訴我如何使用Zxing Library增強現實應用程序嗎?我知道使用Zxing的最簡單的方法是通過Intent,但我需要Camera View,所以我不能使用條形碼應用程序。
I have a SurfaceHolder.Callback
which is added to the main activity and overwrites following method:
我有一個SurfaceHolder.Callback,它被添加到主活動並覆蓋以下方法:
@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()
.
設置的圖片大小必須可用,因為它在list.getSupportedPictureSizes()列表中。
And this method in the QrCodeReader
class which implements PreviewCallback
:
而這個方法在QrCodeReader類中實現了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僅顯示NotFoundException。
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。如果框架沒有條形碼,那就是結果。這並不意味着任何事情本身都是錯誤的。繼續掃描。
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