This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
Override onKeyDown() in your activity, and you can intercept any hardware button press except HOME. Just return true for any keys you handle yourself and let the superclass implementation of onKeyDown() handle the rest.