Android SDK is the official application development package for Android, the Operative System for mobiles and tablets that is all the rage.
Basically this package includes a set of basic tools that allows the developers to start producing their ideas. Beyond the space dedicated for writing code, you can find a very important documentation volume available to check it the time you need.
With Android SDK is also possible to test the created code and know where does it have problems, because it includes debugging tools and mobile simulators of different trademarks and models.
Android SDK also offers several code samples as example that can help you working as an inspiration by the time you are developing an application. This is definitely an essential package for those who need to build utilities that work on the most advanced mobile Operative System of the marketplace.