USB interface in android

Question

I rooted my device and working in host mode. I can able to detect the usb device connected to my tab but Am having two questions.

1) i try to display my device name usi

Answer 1

Code above works fine for most of the devices except Samsung mobile devices. For making them supply Language ID else you will get stall.

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);