I had the same issue, I was working on a react native project and I opened the correct folder, containing the build.gradle, gradle.properties, etc and I didn't appear the Android menu on the Tools tab.
I had the following issue:
My problem was that The Android SDK Platform wasn't installed so I installed and done! it solved my problem, I hope that work for you.
For me: I just clicked on the link to install it and that was all, but if for you doesn't work > find out.