How to open camera using Android NDK

I need to open camera from NDK to enhance the performances and I have search several days in internet. 开发者_运维知识库But nothing get help.

Does anyone know how to open the camera using NDK?

NDK and Performance:

Native code is primarily useful when you have an existing native codebase that you want to port to Android, not for "speeding up" parts of a Java app.

Avoid jumping to the NDK because you think it'll improve performance. Stick to Java and use the profiler to work out bottlenecks there.