I have an Arduino-compatible board with USB Host Shield. It is connected to an Acer A100 Android tablet running "Ice Cream Sandwich" (Android 4.0.3) with Kernel 2.6.39.4. (The tablet has a USB micro connector and does not support USB HOST mode and therefore cannot connect directly to a USB accessory device.)

This picture shows what I have been able to do successfully (but with my tablet in place of the phone).
<http://www.seeedstudio.com/wiki/File:SeeeduinoADK_Setup.jpg>

I would like to find an example of using an Android tablet connected to a USB Accessory (such as a keyboard or flash drive) via Arduino. 

Connecting the USB accessory to the Arduino's USB micro connector (using an external power supply) does not work.

Can anyone provide me with such an example?