How to make Visual Studio 2015 installer know that I already have Android SDK?

Question

When I am installing Visual Studio 2015 I realized that it says Java SE Development Kit is already exists on the computer. I think installer knew it because of

Answer 1

in installer, uncheck downloading android SKDs and let visual studio install completely, then in visual studio go to Tools -> Options -> Xamarin -> Android setting, locate your SDK's path in "Android SDK Location" and locate your NDK's path in "Android NDK location".