What is an appropriate directory in which to install Android SDK?

I don't use java much so what are the common (best practice) locations to install components like this. I want to put them in a system directory so multiple users have access.

Where should Android SDK be installed?

by default, the "Android Studio IDE" will be installed in " C:\Program Files\Android\Android Studio ", and the "Android SDK" in " c:\Users\username\AppData\Local\Android\Sdk ".

What is the Sdk directory?

Google developed Android SDK which is a Software Development Kit developed by Google for the Android platform. You can create Android apps using Android SDK, and you don't need to be an expert to use it.

Common locations are /opt, /srv, and /usr/local. I tend to lean toward /usr/local.

Note that the Android SDK doesn't really require you to install much, it's mostly self-contained. All you need to do is tell Eclipse where it is. You may also want to add the tools and/or platform-tools directories to the system-wide PATH so that your users can use adb and other tools.

See http://developer.android.com/sdk/installing.html.