Android.mk

LOCAL_PATH := $(call my-dir) #This variable indicates the location of 
                             #the source files in the development tree.

# Include shared library in project
####################################

include $(CLEAR_VARS)
LOCAL_MODULE := examplelib       #LOCAL_MODULE variable stores the 
                                 #name of the module that you wish to build.
LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/examplelib.so 
include $(PREBUILT_SHARED_LIBRARY)



# Generate JNI shared library
##############################
include $(CLEAR_VARS)
LOCAL_MODULE := ExampleModule

LOCAL_C_INCLUDES +=$(LOCAL_PATH)/xyz $(LOCAL_PATH)/buffer
LOCAL_CFLAGS := -DANDROID_NDK -O2 -D__STDC_CONSTANT_MACROS -DFROM_PGMS
                -D_GXX_EXPERIMENTAL_CXX0X_ -fexceptions

FILE_LIST = 	ExampleFile.cpp\
              ExampleFile2,cpp

LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%) #LOCAL_SRC_FILES variable must 
                  #contain a list of C and/or C++ source files to build into a module
LD_LIBRARY_PATH+=$(LOCAL_PATH)
LOCAL_LDLIBS := -lGLESv2 -ldl -llog

LOCAL_SHARED_LIBRARIES := sharedLib

include $(BUILD_SHARED_LIBRARY) #This script determines what to build, 
                                #and how to do it.