Newbie requesting advice


I know some java and have recently started studying on how to make android apps and would like to know which topics are strongly recommended for me to study. The app I want to make is very similar to the MetaBase app but there's no template of it.
In my future app (using the API 3.+) I want a:
"start" button which make the meta motion R start logging data from the sensor fusion (EulerAngles and Acceleration)
and a "stop" button to stop the logging and download the data to my phone.
I'm having a hard time identifying how the templates available on Github work and need some guidance on what to study so i can understand them. 

Thanks in advance


This discussion has been closed.