The SDK for its acronym in English Software Development Kit (Program Development Kit) provides the development libraries necessary to build, test and debug our Android applications.

The Android SDK includes an emulator for mobile devices (AVD, Android Virtual Device) that we "run" on our computer. The emulator is a fundamental tool; since it allows us to test our applications.

Characteristics

It is cross-platform Linux, Mac OS and Windows.
The Integrated Development Environment (IDE) officially supports Eclipse along with the Android Development Tools (ADT) plugin and Android Studio.