原文链接：
You need to include like this
1 | #include "Box2D/Box2D.h" |
Because external/Box2D/Android.mk exported
path like this
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/..
And you can comment the lib you don't use, such as chipmunk.
I think you don't need Box2D and chipmunk at the same time.
Right?