This tutorial explains how to set up Android ADK / Arduino environment based on the official instructions.
Step ..
Copy directories from:
~/Documents/Arduino/ADK_release_0512/firmware/arduino_libs
copy to:
~/Documents/Arduino/libraries
Step ..
Create directory:
~/Documents/Arduino/libraries/CapSense
Step ..
Copy ..
~/Documents/Arduino/libraries/CapSense $ ls
CapSense.cpp CapSense.h
Step ..
Installing the Google APIs Add-On (instructions)
Install "Third party Add-ons" - Google APIs 10 revision 2