使用 google 移动视觉 api 检测第一个条码并将数据发送到另一个 activity

Question

您好，我在 github 上检查了来自 google 的条码 reader 样本，我试图让条码检测器检测第一个条码（只有一个）以及何时检测将解码后的条形码发送给另一个 activity。 Mabye 我错了，但我需要输入这段代码

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;
}

在这个的某个地方，这样条形码就可以自动捕获，而无需我在条形码图形 appears.I 还认为我不需要 MultiProcessor.Builder<>

时点击

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

Answer 1

我也在追求同样的结果。这是我如何完成的。

为 BarcodeTracker 添加侦听器：

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;
}

}

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，在 BarcodeCaptureActivity 的 createCameraSource 方法下附加一个新的侦听器并将条形码发送到您想要的任何位置。

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);
        }
    });
...

希望对您有所帮助！

使用 google 移动视觉 api 检测第一个条码并将数据发送到另一个 activity

use google mobile vision api to detect the first barcode and send the data to another activity

android

barcode

google-vision