I've installed Xamarin 5.7 (build 661).
I use Xamarin Android and I've run into a problem when I tried to use the designer in Visual Studio 2013 or Xaramin Studio
Connection to the layout renderer failed. This may be caused by a misconfiguration of Java
I tried to downgrade the tools as mentionned here but this time it did not work
What I had to is to
Now, I can use the latest Android SDK tools (24.0.2 at this time) This is where I found the solution