USB Device listing in android

            UsbManager manager = (UsbManager) xCtx.getSystemService(Context.USB_SERVICE);
            HashMap<String, UsbDevice> devices = manager.getDeviceList();
            Iterator<String> iterator = devices.keySet().iterator();
            while (iterator.hasNext()) {
                String key = (String) iterator.next();
                FusionInventory.log(this,key, Log.VERBOSE);
                UsbDevice mydevice = devices.get(key);
                Category c = new Category(mCtx, "USBDEVICES");
                c.put("CLASS", Integer.toString(mydevice.getDeviceClass()));
                c.put("PRODUCTID", Integer.toString(mydevice.getProductId()));
                c.put("VENDORID", Integer.toString(mydevice.getVendorId()));
                c.put("SUBCLASS", Integer.toString(mydevice.getDeviceSubclass()));
                this.add(c);
            }