Android Phone to USB Accessory

I am using my Android 4.0 device and Seeeduino Main ADK Board as pictured here: … _Setup.jpg
So far, so good.

What I would like is a project example of having the Android device connect to a USB accessory such as a keyboard or flash drive. (I actually have a custom USB accessory I need to connect.)

Does such a project example exist?

Dear roc524
Following is the SeeeduinoADKDemo-App,and you can download it and have a try. (75 KB)