Issue with usb connection about escpos-thermalprinter-android HOT 2 OPEN

 public UsbOutputStream(UsbManager usbManager, UsbDevice usbDevice) throws IOException {
        this.usbInterface = usbDevice.getInterface(0);
        for (int i = 0; i < this.usbInterface.getEndpointCount(); ++i) {
            UsbEndpoint ep = this.usbInterface.getEndpoint(i);
            if (ep.getType() == 2) {
                if (ep.getDirection() == 0) {
                    this.usbEndpoint = ep;
                } else if (ep.getDirection() == 128) {
                    this.usbEndpoint = ep;
                }
            }
        }
        if (this.usbInterface == null) {
            throw new IOException("Unable to find USB interface.");
        }
        if (this.usbEndpoint == null) {
            throw new IOException("Unable to find USB endpoint.");
        }

        this.usbConnection = usbManager.openDevice(usbDevice);
        if (this.usbConnection == null) {
            throw new IOException("Unable to open USB connection.");
        }
    }