Android : how to detect already connected usb device?

Question

I'm trying to detect usb devices which are already connected to android. I understand there are actions to detect when USB is either attached or detached. But I don't really get how to check devices after connecting usb device to android. Also, I've found that each USB device has it's device class code, but how do I figure out what kind of device is connected? For instance, I need to detect both usb mouse and keyboard; how do I differentiate them?

Answer 1

Try this:

1. First register Broadcast for USB connection. manifest permission:

:

<intent-filter> <action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" /> </intent-filter>

2. Get the List of USB Device with details by using this

   public void getDetail() {
   UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
   
   HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
   Iterator<UsbDevice> deviceIterator = deviceList.values().iterator();
   while (deviceIterator.hasNext()) {
       UsbDevice device = deviceIterator.next();
   
       manager.requestPermission(device, mPermissionIntent);
       String Model = device.getDeviceName();
   
       int DeviceID = device.getDeviceId();
       int Vendor = device.getVendorId();
       int Product = device.getProductId();
       int Class = device.getDeviceClass();
       int Subclass = device.getDeviceSubclass();
   
   }}
   

Answer 2

Just to answer Benny's question here is what the mPermissionIntent could look like:

string actionString = context.PackageName + ".action.USB_PERMISSION";

PendingIntent mPermissionIntent = PendingIntent.GetBroadcast(context, 0, new 
Intent(actionString), 0);
mUsbManager.RequestPermission(device, permissionIntent);