How to complie to a library.so file ?

[yuri4029]

Hi everyone, I am trying to compile pangolin with an android project, and the very fist case is create file lib.so.
I think I should do something with file CMakeList.txt and file build.gardle in project. I tried this

but the library created is only 5kb, so I think something went wrong , If some one know how to fix please help me.