I've developed different personal apps for android and now i'm interested in google cardboard project
So, would be possible to create an application for android to implement the same system of this project : http://www.vrdesktop.net ( windows only ). In few words mirroring the android screen inside another app that will split everything .. actually i don't know if there are some usefull api/ways to accomplish the job.
EDIT1: i've prepared a draw to better show the idea: https://docs.google.com/drawings/d/15AYvjesIhZDTe5mfOmm5TzhRkyxmDA6L0jI9MzdKbB4/edit
After long researches i've found an open source project that is doing exactly what i was looking for:
P.S. Thank you for useless downvoting