the code is using Urho3D as engine, https://github.com/urho3d/Urho3D
hmi related native code is under ./Source/Tools/Game/
amap navigation integration code is under ./Android/src/com/github/urho3d/
notice about testing:
make your C2/EON connect to your phone/pad hotspot, and set to a fixed ip, e.g. "192.168.43.138"
make sure your pad is set to a fixed ip address, either "192.168.43.138" or "192.168.43.1"
the ip of C2 try to connnect to is list in :
https://github.com/299299/openpilot/blob/stock_additions_new/selfdrive/golden/phone_control.py#L99
latest apk release: