I'm having the same problem to solve, because I need to install JDK8 to run Android SDK Manager (because it seems that don't work well with JDK9).However, I tell you how I solve all problems on a Mac (Sierra).
I'm having the same problem to solve, because I need to install JDK8 to run Android SDK Manager (because it seems that don't work well with JDK9).However, I tell you how I solve all problems on a Mac (Sierra).