Android jni import

Hello,

I am new with Wwise and I need to create an Android project without Unity - I just want to change the sound engine in my existing app.
The only way seems jni. I downloaded the MacOs SDK, but the Android folder in {SDK_PATH}/include/AK/SoundEngine/Platforms misses.

Is it normal? Is there a tutorial for jni import?

Thank you

Dario