Android USB host and hidden devices

by

To enable USB host API support you should add a file named
android.hardware.usb.host.xml
and containing the following lines:

<permissions>
 <feature name="android.hardware.usb.host"/>
</permissions>

into folder

/system/etc/permissions

in that folder find file named

handheld_core_hardware.xml or tablet_core_hardware.xml

and add 

<feature name="android.hardware.usb.host" />

into <permissions> section.

Reboot your device. Usb host api should work.

Tested on CUBE U30GT with android 4.

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