public void decodeContinuous(BarcodeCallback callback) {
        this.decodeMode = DecodeMode.CONTINUOUS;
        this.callback = callback;
        startDecoderThread();
    }
Continuously decode barcodes. The same barcode may be returned multiple times per second.

The callback will only be called on the UI thread.

@param callback called with the barcode result, as well as possible ResultPoints
zxing-android-embedded/src/com/journeyapps/barcodescanner/BarcodeView.java