使用google mobile vision api检测第一个条形码并将数据发送到另一个活动

Question

嗨,我在github上检查谷歌上的条形码阅读器样本,我试图让条形码检测器检测到第一个条形码(只有一个),当它这样做时,它将解码的条形码发送到另一个活动.Mabye我错了,但我需要把这段代码

BarcodeGraphic graphic = mGraphicOverlay.getFirstGraphic();
    Barcode barcode = null;
    if (graphic != null) {
        barcode = graphic.getBarcode();
        if (barcode != null) {
            Intent data = new Intent();
            data.putExtra(BarcodeObject, barcode);
            setResult(CommonStatusCodes.SUCCESS, data);
            finish();
        }
        else {
            Log.d(TAG, "barcode data is null");
        }
    }
    else {
        Log.d(TAG,"no barcode detected");
    }
    return barcode != null;
}

在这一个的某个地方,条形码被自动捕获,而不需要在条形码图形出现时点击.我还认为我不需要MultiProcessor.Builder <>

BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(context).build();
    BarcodeTrackerFactory barcodeFactory = new BarcodeTrackerFactory(mGraphicOverlay);
    barcodeDetector.setProcessor(
            new MultiProcessor.Builder<>(barcodeFactory).build());

Answer 1

我是在追求相同的结果.以下是我如何完成它.

添加一个监听器BarcodeTracker:

class BarcodeTrackerFactory implements MultiProcessor.Factory<Barcode> {
private GraphicOverlay<BarcodeGraphic> mGraphicOverlay;

private OnNewBarcodeListener newBarcodeListener;

BarcodeTrackerFactory(GraphicOverlay<BarcodeGraphic> barcodeGraphicOverlay) {
    mGraphicOverlay = barcodeGraphicOverlay;
}

@Override
public Tracker<Barcode> create(Barcode barcode) {
    BarcodeGraphic graphic = new BarcodeGraphic(mGraphicOverlay);
    newBarcodeListener.onNewItem(barcode);
    return new BarcodeGraphicTracker(mGraphicOverlay, graphic);
}

public interface OnNewBarcodeListener {
    void onNewItem(Barcode item);
}

public void setOnNewBarcodeListener(OnNewBarcodeListener newBarcodeListener) {
    this.newBarcodeListener = newBarcodeListener;
}

}

只要在检测到新条形码时调用create方法,就会触发此侦听器.

接下来,BarcodeCaptureActivity在createCameraSource方法下,附加一个新的监听器,并在任何你喜欢的地方发送条形码.

private void createCameraSource(boolean autoFocus, boolean useFlash) {
    Context context = getApplicationContext();

    // A barcode detector is created to track barcodes.  An associated multi-processor instance
    // is set to receive the barcode detection results, track the barcodes, and maintain
    // graphics for each barcode on screen.  The factory is used by the multi-processor to
    // create a separate tracker instance for each barcode.
    BarcodeDetector barcodeDetector = new BarcodeDetector.Builder(context).build();
    BarcodeTrackerFactory barcodeFactory = new BarcodeTrackerFactory(mGraphicOverlay);

    barcodeFactory.setOnNewBarcodeListener(new BarcodeTrackerFactory.OnNewBarcodeListener() {
        @Override
        public void onNewItem(Barcode item) {
            Log.d("BarcodeFound", "Found new barcode! " + item.rawValue);
            Intent intent = new Intent(this, DoSomethingWithBarcodeActivity.class);
            intent.putExtra("barcode", item.rawValue);
            startActivity(intent);
        }
    });
...

希望有所帮助!