An Introduction to Android

Understanding Android Complete Architecture Overview part-3

Understanding Android Complete Architecture Overview part-2

Understanding Android Complete Architecture Overview

ANDROID MOBILE DEMO

IMPORTANT LINKS ABOUT ANDROID

Here are some links to a webpages about the Android:
http://www.google-phone.com - News about Android mobiles
http://androidguys.blogspot.com - Android news
http://androidcommunity.com - News and forums
http://ohaandroid.com - The unofficial Open Handheld Alliance community
http://www.androidev.com - Forum for developers
http://www.androidcomponents.com - Android components forum
http://www.anddev.org - Forum for developers
http://www.androiddevelopment.org - Applications made by Germans
http://androidwiki.com/ - Android wiki
Hope that those links will be usefull for you too.