In order to start development of your Android “Apps”, first of all you should download and install the Android SDK (http://developer.android.com/sdk/index.html). Please follow the instructions reported on http://developer.android.com/sdk/installing.html in order to properly install the SDK. If you want to use Eclipse as IDE, you should also install the Android Development Tools (ADT) Plugin (please find here the related instructions: http://developer.android.com/sdk/eclipse-adt.html#installing).

A lot of information on how to start programming can be found here: http://developer.android.com/guide/developing/index.html.

=== Useful Links ===

[https://developer.android.com/training/index.html Tutorial]