Native C++ code for android camera

edit

There is Native Activity example in OpenCV4Android SDK since version 2.4.5. I recommend you to start from it.

Basically this topic show you the difference between the native C++ and the android Java interface:

http://answers.opencv.org/question/5524/access-mobile-camera-from-native-c-vs-android/

It means that for native C++ you need to use the VideoCapture class which enables you to read out camera frames based on there index number. Look at the examples given there.