Unable to access usb of Tiny210 board using android apk

Forum: Android
Ravindra Gopal 
Hi!!!

I have Tiny210 board with Android OS loaded, I try to access usb port of
device using android application but unable to access usb.

Please having any solution to access usb device connect to Tiny210 board
using android application then suggest

Francisco Erivaldo Fernandes Jun 
To enable USB host API support on Mini210S running Android 4.0.3 follow
these steps:
Connect the Mini210S on your PC (make sure the ADB is already working);
In a terminal windows: 
adb pull /system/etc/permissions/handheld_core_hardware.xml
/home/YOUR_USER_NAME
This command will copy the file handheld_core_hardware.xml to your home
folder.
Edit the file handheld_core_hardware.xml in your PC:
You need to add the following line:
<feature name="android.hardware.usb.host" />
This line need to be added between the <permissions> section. 
Do not edit anything else!
The file will look like:
<permissions> 
    <feature name="android.hardware.camera" /> 
    <feature name="android.hardware.location" /> 
    <feature name="android.hardware.location.network" /> 
    <feature name="android.hardware.sensor.compass" /> 
    <feature name="android.hardware.sensor.accelerometer" /> 
    <feature name="android.hardware.bluetooth" /> 
    <feature name="android.hardware.touchscreen" /> 
    <feature name="android.hardware.microphone" /> 
    <feature name="android.hardware.screen.portrait" /> 
    <feature name="android.hardware.screen.landscape" /> 
    <feature name="android.hardware.usb.host" /> 
</permissions>
Send the file back to your Mini210S:
adb push handheld_core_hardware.xml /system/etc/permissions

Now you should be able to use any app that needs the USB host API on your
Mini210S.

source:
http://stackoverflow.com/questions/11183792/android-usb-host-and-hidden-...