Android device as USB Accessory

Question

I want to connect Android device to a host device. The android device will work as an accessory as the host will power the bus. My application code for android looks like:

Android Manifest

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

 <meta-data android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"
         android:resource="@xml/usb_xml" />

The usb xml looks like: usb_xml

 <resources> 
      <usb-accessory model="Google Inc" manufacturer="0x2D01" version="2.12.1.0"/>   
 </resources>

Is it mandatory to have the usb.xml ??

So when I am trying to get the connected USBDevice details, the USB Device list is always null :

UsbManager manager = (UsbManager) getSystemService(Context.USB_SERVICE);
Map<String,UsbDevice> deviceList = manager.getDeviceList();

Again, I also tried to get the accessory list, the USB accessorylist is also null

UsbAccessory[] accessoryList = manager.getAccessoryList();

I don't know what is the problem. I am having an HP laptop connected with a Samsung mobile (GellyBean(17) > 12 API)., where HP laptop is the host and Samsung mobile is accesosory

Some one Please help me I am stuck for a long time.

Saby Saby · Accepted Answer · 2016-10-13T11:44:49

The iprules of the device were protecting the communication to happen. When I configured the rules properly, communication was happening properly.

Android device as USB Accessory

1 Answers