MRAA installation confusion

Well after weeks and weeks of reading and searching… I am stuck.
I cannot find a definitive , complete guide for installing MRAA into Andriod 9 on the rockpi-4.
There are a lot of guides for Linux and some for other Android variants…

I am having a lot of difficulty trying to install MRAA on my Rockpi-4 with Android 9 -tablet version.
I tried the MRAA.aar and the MRAA-example with android studio but I just get ‘gradle’ version related errors which I cannot completely resolve.

I have successfully built a demo ‘hello world’ app using Android Studio , but no luck with MRAA.

Also, regarding the wiki examples
Where does one actually place the script that configures each GPIO component?

First, gradle errors need to be solved by yourself, something every Android developer experiences.