How to install Android SDK via Android Studio on Windows
The Android software development kit (SDK) is an essential tool for everyone who wants to try developing apps on Android, but it's also useful for those who want to tinker with their device, be it for rooting, flashing images, or some other hackery.
The SDK itself is not a full-on development environment -- it provides the tools you need to develop on Android, but you need a separate IDE in order to write programs. And while most old-time developers are used to the popular Eclipse IDE which integrates well with the Android SDK tools, Google's own Android Studio is a much easier to setup, nearly one-click solution that allows you to get your apps up and running.
Things that are NOT allowed: