USB Accessory API on Samsung Galaxy S2 Android

Question

I am not able to launch my android application on to the Samsung Galaxy S2. I am trying to use the Google Add on Library for USB Accessory. When I launch the same application on Google Nexsus S it works fine.

In the application manifest file I have used the following tag (under the application tag):

<uses-library android:name="com.android.future.usb.accessory"/> 

The error that i am getting on the console is

[2011-08-11 12:00:28 - App] Installation error: INSTALL_FAILED_MISSING_SHARED_LIBRARY
[2011-08-11 12:00:28 - App] Please check logcat output for more details.
[2011-08-11 12:00:29 - App] Launch canceled!

Now if I omit the following line from manifest:

<uses-library android:name="com.android.future.usb.accessory"/> 

I get the following error on LogCat:

08-11 11:58:40.250: ERROR/AndroidRuntime(30780): java.lang.NoClassDefFoundError: com.android.future.usb.UsbManager

Any ideas to get round this problem?

My goal is to use the USB host (or at least use the USB Accessory API) on Galaxy S2.

Answer 1

I got solution to this problem.

We just need to push one xml file into the device's "/etc/permissions" folder.

android.hardware.usb.accessory.xml with the content

<?xml version="1.0" encoding="utf-8"?>
<permissions>
    <feature name="android.hardware.usb.accessory" />
    <library name="com.android.future.usb.accessory"
           file="/system/framework/com.android.future.usb.accessory.jar" />
</permissions>

If you are getting the "read only file system" error. then you need to root your device like this.

After all reboot. It will work fine.