Android Studio includes the Android Studio IDE and the Android SDK tools.

1. Confirm that your system meets the requirements at http://developer.android.com/sdk/requirements.html.
2. Download and install Android Studio from https://developer.android.com/sdk/index.html
3. Add the Android SDK to your PATH environment variable:
   • On Windows, add <Android SDK Location>\tools to the PATH environment variable.
   • On OS X, the command is: export PATH=$PATH:<path to Android SDK>/tools .
4. Download and install Extras > Android Support Repository.
5. Download and install Extras > Android Support Library. For more information, see also Support Library Setup.
6. Launch the Android SDK Manager and download the latest tools:
   1. Open the Tools directory and select: SDK Tools, SDK Platform-tools, and the highest version of the SDK Build-tools.
   2. Open the Android X.X folder (the latest version) and select: SDK Platform and a system emulator such as ARM EABI v7a System Image.
7. Download any additional packages. See http://developer.android.com/sdk/installing/adding-packages.html.
8. Install the packages.