Box2d integration problems

I am trying to follow this tutorial (http://gameit.ro/2011/08/creating-a-cocos2d-x-box2d-android-project/) to integrate Box2d into my existing Android project. However, my Android.mk and Application.mk files look completely different compared to the author’s.

This is what my jni/Android.mk file looks like.
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := game_shared LOCAL_MODULE_FILENAME := libgame LOCAL_SRC_FILES := helloworld/main.cpp \ ../../Classes/AppDelegate.cpp \ ../../Classes/HelloWorldScene.cpp ../../../lua/cocos2dx_support/CCLuaEngine.cpp \ ../../../lua/cocos2dx_support/Cocos2dxLuaLoader.cpp \ ../../../lua/cocos2dx_support/LuaCocos2d.cpp \ ../../../lua/cocos2dx_support/tolua_fix.c LOCAL_C_INCLUDES := $(LOCAL_PATH)/../../Classes LOCAL_WHOLE_STATIC_LIBRARIES := cocos2dx_static cocosdenshion_static box2d_static cocos_lua_static include $(BUILD_SHARED_LIBRARY) $(call import-module,CocosDenshion/android) $(call import-module,cocos2dx) $(call import-module,Box2D) $(call import-module,lua/proj.android/jni)

This is what my jni/Application.mk file looks like.
APP_STL := gnustl_static APP_CPPFLAGS := -frtti

And my jni/HelloWorld doesn’t have any Android.mk file. How do I go about integrating Box2d into my project?