Question

您好我检查了github上google的条形码阅读器示例，我试图让条形码检测器检测到第一个条形码（只有一个），当它执行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;
}

在这个地方的某个地方，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＆lt;＆gt;

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。

向BarcodeTracker添加一个监听器：

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;
}

}

当检测到新的条形码时，只要调用create方法，就会触发此侦听器。

接下来，从BarcodeCaptureActivity开始，在createCameraSource方法下添加一个新的监听器，并在您喜欢的任何地方发送条形码。

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！

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

1 个答案: