Due to the connected devices mobile apps will have a significant increase. Android is one of the most used technologies in this world of connected devices, so let’s look at this a mobile review on Android: http://www.wisegeek.com/what-is-android-technology.htm
10 things you should know about Android: http://heavy.com/tech/2013/06/what-is-android-os-operating-system-info-wiki/
In order to develop an Android application, you need to install an SDK. A little video to understand it better: http://www.youtube.com/watch?v=gdeIol1m6A0
If you don’t have an Android mobile device, you can use Emulators. In this article you have the 5 bests emulators for Windows: http://www.techbate.com/5-best-android-emulator-for-windows-87xp/
Our selection of Android tutorials. A basic knowledge of Java programming is required.
A. How to develop your first app in Android: http://www.raywenderlich.com/56107/make-first-android-app-part-1
B. Nice tutorials in order to understand more about Android: http://www.tutorialspoint.com/android/
C. How to become an Android expert: http://www.vogella.com/tutorials/Android/article.html