Hi folks,
Thanks for coming out for the talk! Here are the slides and sample code as promised. Please send me feedback!

Presentation

To run the sample code please make sure you have the Android 2.2 platform installed from the “Window>Android SDK and AVD Manager”
To import this sample code use File>Import then choose General>Existing Projects into Workspace use the “select archive file” then hit “Finish”
TipCal sample project

Hua-Ying