public static boolean usbAudio(Context context) {

            UsbManager mUsbManager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
            Map<String, UsbDevice> mDeviceMap = mUsbManager.getDeviceList();//获取系统内的所有usb设备
            for (Map.Entry<String, UsbDevice> entry : mDeviceMap.entrySet()) {
                UsbDevice usbDevice = entry.getValue();
//                Log.d(TAG, "USB Device " +
////                                ", SerialNumber=" + usbDevice.getSerialNumber()
//                                "DeviceId=" + usbDevice.getDeviceId() +
//                                ", DeviceName=" + usbDevice.getDeviceName() +
//                                ", ProductId=" + usbDevice.getProductId() +
//                                ", ProductName=" + usbDevice.getProductName() +
//                                ", ManufacturerName=" + usbDevice.getManufacturerName() +
//                                ", Version=" + usbDevice.getVersion() +
//                                ", VendorId=" + usbDevice.getVendorId() +
//                                " ,DeviceClass=" + usbDevice.getDeviceClass()
//
//                );
                int interfaceCount = usbDevice.getInterfaceCount();
                for (int index = 0; index < interfaceCount; index++) {
                    UsbInterface usbInterface = usbDevice.getInterface(index);
                    if (usbInterface.getInterfaceClass() == UsbConstants.USB_CLASS_AUDIO) {
                        Log.d(TAG, "USB Audio: " + usbDevice.getProductName());
                        break;
                    }
                }
            }

            return false;
        }