title: How to make Visual Studio 2015 installer know that I already have Android SDK?
body: <p>When I am installing Visual Studio 2015 I realized that it says <code>Java SE Development Kit</code> is already exists on the computer. I think installer knew it because of <code>environment variables</code>. That's why I set <code>ANDROID_SDK_HOME</code> and <code>ANDROID_NDK</code> environment variables.</p>
  
  <p>But when I launch the installer again it is still aware of only Java Development Kit.</p>
  
  <p>Do I set wrong environment names? How to make the installer know that I already have SDK and NDK?</p>