Others-Google I/O 2008

haven't finish the second video, but I guess it is quite helpful as it explains the concept of Threads, Services

Introduction to Android

XML

There are two ways to build the XML, the built in GUI method or by typing the code.

Android Activity

This explains on how the activity works.Before starting the new activity the state of the current activity is being stored to the system. This is based on the LIFO queue.