1.USB的设备类型定义在UsbConstants.java 中，有以下几种
2.那到底怎么知道usb外设的类型是属于那种呢，通过以下接口
2.1若是mtk方案，外接设备后，从kernel log可以看得到
<6>[ 9047.548616] (2)[17:kworker/2:0]hid-generic0003:0C2E:0E4A.001D: hidraw0: USBHID v1.10Device [xxxxxxxx] on usb-musb-hdrc.0.auto-1.2.1/input2
0003:0C2E:0E4A.001D对应设备的VID PID的16进制数，前面的0003是设备的类型
2.2 但是有写有vendor自定义的类型则无法直观的看出从sys log可以看到以下打印信息，其中mClass=255就是我们想要知道的类型，此处为255及ffh,对应UsbConstants中的 USB_CLASS_VENDOR_SPEC
UsbHostManager: Added device UsbDevice[mName=/dev/bus/usb/001/030,mVendorId=5246,mProductId=8214,mClass=0,mSubclass=0,mProtocol=0,mManufacturerName=UPEK,mProductName=Biometric Coprocessor,mVersion=1.16,mSerialNumber=null,mConfigurations=[ 01-01 23:45:56.345537 769 1052 D UsbHostManager: UsbConfiguration[mId=1,mName=null,mAttributes=160,mMaxPower=50,mInterfaces=[ 01-01 23:45:56.345537 769 1052 D UsbHostManager: UsbInterface[mId=0,mAlternateSetting=0,mName=null,mClass=255,mSubclass=0,mProtocol=0,mEndpoints=[ 01-01 23:45:56.345537 769 1052 D UsbHostManager: UsbEndpoint[mAddress=129,mAttributes=2,mMaxPacketSize=64,mInterval=0] 01-01 23:45:56.345537 769 1052 D UsbHostManager: UsbEndpoint[mAddress=2,mAttributes=2,mMaxPacketSize=64,mInterval=0] 01-01 23:45:56.345537 769 1052 D UsbHostManager: UsbEndpoint[mAddress=131,mAttributes=3,mMaxPacketSize=4,mInterval=20]]]]
以上信息存在于UsbDevice.java中
可以按照自己的格式显示usb设备插入时的相关信息
private String listUsbDevices(boolean all) { UsbManager usbManager = (UsbManager) getSystemService(Context.USB_SERVICE); HashMap deviceList = usbManager.getDeviceList(); if (deviceList.size() == 0) { return "no usb devices found"; } Iterator deviceIterator = deviceList.values().iterator(); String returnValue = ""; while (deviceIterator.hasNext()) { UsbDevice device = (UsbDevice)deviceIterator.next(); if ((device.getVendorId() == xxxx) && ((device.getProductId() == xxxx) )) //这里可以过滤你所关心的pid vid { if (!all) { returnValue = returnValue + "Model: " + device.getDeviceName() + "\r\n"; returnValue = returnValue + "ID: " + device.getDeviceId() + "\r\n"; returnValue = returnValue + "Class: " + device.getDeviceClass() + "\r\n"; returnValue = returnValue + "Protocol: " + device.getDeviceProtocol() + "\r\n"; returnValue = returnValue + "Vendor ID " + device.getVendorId() + "\r\n"; returnValue = returnValue + "Product ID: " + device.getProductId() + "\r\n"; returnValue = returnValue + "Interface count: " + device.getInterfaceCount() + "\r\n"; returnValue = returnValue + "---------------------------------------\r\n"; for (int index = 0; index < device.getInterfaceCount(); index++) { UsbInterface mUsbInterface = device.getInterface(index); returnValue = returnValue + " ***** *****\r\n"; returnValue = returnValue + " Interface index: " + index + "\r\n"; returnValue = returnValue + " Interface ID: " + mUsbInterface.getId() + "\r\n"; returnValue = returnValue + " Inteface class: " + mUsbInterface.getInterfaceClass() + "\r\n"; returnValue = returnValue + " Interface protocol: " + mUsbInterface.getInterfaceProtocol() + "\r\n"; returnValue = returnValue + " Endpoint count: " + mUsbInterface.getEndpointCount() + "\r\n"; for (int epi = 0; epi < mUsbInterface.getEndpointCount(); epi++) { UsbEndpoint mEndpoint = mUsbInterface.getEndpoint(epi); returnValue = returnValue + " ++++ ++++ ++++\r\n"; returnValue = returnValue + " Endpoint index: " + epi + "\r\n"; returnValue = returnValue + " Attributes: " + mEndpoint.getAttributes() + "\r\n"; returnValue = returnValue + " Direction: " + mEndpoint.getDirection() + "\r\n"; returnValue = returnValue + " Number: " + mEndpoint.getEndpointNumber() + "\r\n"; returnValue = returnValue + " Interval: " + mEndpoint.getInterval() + "\r\n"; returnValue = returnValue + " Packet size: " + mEndpoint.getMaxPacketSize() + "\r\n"; returnValue = returnValue + " Type: " + mEndpoint.getType() + "\r\n"; } } returnValue = returnValue + "\n"; returnValue = returnValue + "\n"; } } else if (device.getVendorId() != 3118); if (all == true) { returnValue = returnValue + "Model: " + device.getDeviceName() + "\r\n"; returnValue = returnValue + "ID: " + device.getDeviceId() + "\r\n"; returnValue = returnValue + "Class: " + device.getDeviceClass() + "\r\n"; returnValue = returnValue + "Protocol: " + device.getDeviceProtocol() + "\r\n"; returnValue = returnValue + "Vendor ID " + device.getVendorId() + "\r\n"; returnValue = returnValue + "Product ID: " + device.getProductId() + "\r\n"; returnValue = returnValue + "Interface count: " + device.getInterfaceCount() + "\r\n"; returnValue = returnValue + "---------------------------------------\r\n"; for (int index = 0; index < device.getInterfaceCount(); index++) { UsbInterface mUsbInterface = device.getInterface(index); returnValue = returnValue + " ***** *****\r\n"; returnValue = returnValue + " Interface index: " + index + "\r\n"; returnValue = returnValue + " Interface ID: " + mUsbInterface.getId() + "\r\n"; returnValue = returnValue + " Inteface class: " + mUsbInterface.getInterfaceClass() + "\r\n"; returnValue = returnValue + " Interface protocol: " + mUsbInterface.getInterfaceProtocol() + "\r\n"; returnValue = returnValue + " Endpoint count: " + mUsbInterface.getEndpointCount() + "\r\n"; for (int epi = 0; epi < mUsbInterface.getEndpointCount(); epi++) { UsbEndpoint mEndpoint = mUsbInterface.getEndpoint(epi); returnValue = returnValue + " ++++ ++++ ++++\r\n"; returnValue = returnValue + " Endpoint index: " + epi + "\r\n"; returnValue = returnValue + " Attributes: " + mEndpoint.getAttributes() + "\r\n"; returnValue = returnValue + " Direction: " + mEndpoint.getDirection() + "\r\n"; returnValue = returnValue + " Number: " + mEndpoint.getEndpointNumber() + "\r\n"; returnValue = returnValue + " Interval: " + mEndpoint.getInterval() + "\r\n"; returnValue = returnValue + " Packet size: " + mEndpoint.getMaxPacketSize() + "\r\n"; returnValue = returnValue + " Type: " + mEndpoint.getType() + "\r\n"; } } } } textView.setText(returnValue); return returnValue; }
