NDK 编译和使用静态库、动态库
情况一：编译静态库
情况二：编译动态库
情况三：编译动态库+静态库
情况四：已有第三方静态库（动态库），编译静态库（动态库）
默认所有代码和文件在$project/jni下，否则特殊说明。
情况一：编译静态库
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := hello-jni.c
include $(BUILD_STATIC_LIBRARY)
文件Application.mk:
APP_MODULES:=hello-jni
情况二：编译动态库
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := hello-jni
LOCAL_SRC_FILES := hello-jni.c
include $(BUILD_SHARED_LIBRARY)
情况三：编译动态库+静态库
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_static
LOCAL_SRC_FILES := src.c
include $(BUILD_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_shared
LOCAL_SRC_FILES := src2.c
LOCAL_STATIC_LIBRARIES:= mylib_static
include $(BUILD_SHARED_LIBRARY)
情况四：已有第三方静态库(动态库)，编译静态库(动态库)
文件Android.mk:
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := thirdlib1 # name it whatever
LOCAL_SRC_FILES :=$(TARGET_ARCH_ABI)/libthird1.a # or $(so_path)/libthird1.so
#LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_STATIC_LIBRARY) #or PREBUILT_SHARED_LIBRARY
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_use_thirdlib
LOCAL_SRC_FILES := src.c
LOCAL_STATIC_LIBRARIES:= thirdlib1 #or LOCAL_SHARED_LIBRARY
include $(BUILD_SHARED_LIBRARY) #如果编译静态库，需要Application.mk