android获取USB设备的名称

1.注释内。是三星设备可能不支持，需要更换的代码。

2.mUsbManager。是getSystemService(Context.USB_SERVICE)获的。

3. 从stackoverflow摘过来的。源地址找不到咧。

protected static final int STD_USB_REQUEST_GET_DESCRIPTOR = 0x06;
// http://libusb.sourceforge.net/api-1.0/group__desc.html
protected static final int LIBUSB_DT_STRING = 0x03;

public String getUSBName() {
String strusbName = null;
HashMap<String, UsbDevice> deviceList = mUsbManager.getDeviceList();
if (deviceList.size() == 0) {
return strusbName;
}

Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();

if (deviceIterator.hasNext()) {
UsbDevice device = (UsbDevice) deviceIterator.next();
strusbName = device.getDeviceName();

Log.d("", "Name: " + device.getDeviceName()+"\n"
+ "VID: " + device.getVendorId()
+ " PID: " + device.getProductId());

UsbInterface intf = device.getInterface(0);
int epc = 0;
epc = intf.getEndpointCount();
Log.d("","Endpoints:" + epc + "\n");

Log.d("","Permission:" + Boolean.toString(mUsbManager.hasPermission(device)) + "\n");

UsbDeviceConnection connection = mUsbManager.openDevice(device);
if(null==connection){
Log.d("","(unable to establish connection)\n");
} else {

// Claims exclusive access to a UsbInterface.
// This must be done before sending or receiving data on
// any UsbEndpoints belonging to the interface.
connection.claimInterface(intf, true);

// getRawDescriptors can be used to access descriptors
// not supported directly via the higher level APIs,
// like getting the manufacturer and product names.
// because it returns bytes, you can get a variety of
// different data types.
byte[] rawDescs = connection.getRawDescriptors();
String manufacturer = "", product = "";

try
{
byte[] buffer = new byte[255];
int idxMan = rawDescs[14];
int idxPrd = rawDescs[15];

int rdo = connection.controlTransfer(UsbConstants.USB_DIR_IN
| UsbConstants.USB_TYPE_STANDARD, STD_USB_REQUEST_GET_DESCRIPTOR,
(LIBUSB_DT_STRING << 8) | idxMan, 0, buffer, 0xFF, 0);
manufacturer = new String(buffer, 2, rdo - 2, "UTF-16LE");

rdo = connection.controlTransfer(UsbConstants.USB_DIR_IN
| UsbConstants.USB_TYPE_STANDARD, STD_USB_REQUEST_GET_DESCRIPTOR,
(LIBUSB_DT_STRING << 8) | idxPrd, 0, buffer, 0xFF, 0);
product = new String(buffer, 2, rdo - 2, "UTF-16LE");

/* int rdo = connection.controlTransfer(UsbConstants.USB_DIR_IN
| UsbConstants.USB_TYPE_STANDARD, STD_USB_REQUEST_GET_DESCRIPTOR,
(LIBUSB_DT_STRING << 8) | idxMan, 0x0409, buffer, 0xFF, 0);*/

} catch (UnsupportedEncodingException e)
{
e.printStackTrace();
}

Log.d("","Manufacturer:" + manufacturer + "\n");
Log.d("","Product:" + product + "\n");
Log.d("","Serial#:" + connection.getSerial() + "\n");
}

}
return strusbName;
}

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