jni lib so
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以前没使用过jni,现在用起来比较复杂了,总是弄的一头雾水,比如现在写得双向翻译:
含有多个第三方库,如何加载进来呢,网上找了很久,发现这样可以做到:
更改:android.mk
- LOCAL_PATH := $(call my-dir)
- include $(CLEAR_VARS)
- LOCAL_MODULE := static
- #LOCAL_STATIC_LIBS
- LOCAL_SRC_FILES := multran.a
- include $(PREBUILT_STATIC_LIBRARY)
- include $(CLEAR_VARS)
- LOCAL_MODULE := Translate
- LOCAL_SRC_FILES := getTransContent.c
- LOCAL_STATIC_LIBS := static
- LOCAL_LDLIBS := -llog
- include $(BUILD_SHARED_LIBRARY)
编译提示:
<请注意第三行,多了一次编译>
结果:可以编译,但如何加入多个静态库呢?
继续更改 android.mk
- LOCAL_PATH := $(call my-dir)
- include $(CLEAR_VARS)
- LOCAL_MODULE := static
- #LOCAL_STATIC_LIBS
- LOCAL_SRC_FILES := multran.a
- LOCAL_SRC_FILES := 2.a
- LOCAL_SRC_FILES := 3.a
- include $(PREBUILT_STATIC_LIBRARY)
- include $(CLEAR_VARS)
- LOCAL_MODULE := Translate
- LOCAL_SRC_FILES := getTransContent.c
- LOCAL_STATIC_LIBS := static
- LOCAL_LDLIBS := -llog
- include $(BUILD_SHARED_LIBRARY)
编译结果 同上
结论:只能编译第一个库,晕了,是不是写错了,
最后改成:
- include $(CLEAR_VARS)
- LOCAL_MODULE := Translate
- LOCAL_SRC_FILES := getTransContent.c
- LOCAL_STATIC_LIBS += 1.a
- LOCAL_STATIC_LIBS += 2.a
- LOCAL_STATIC_LIBS += 3.a
- LOCAL_LDLIBS := -llog
- include $(BUILD_SHARED_LIBRARY)
这样就OK拉,全部编译了
写错了 这样编译是通过了,可是在实际运用中,却无法访问静态库中的函数的
查看JNi的sample中,模仿写法如下:
- include $(CLEAR_VARS)
- LOCAL_MODULE := libA
- LOCAL_SRC_FILES := libA.a
- include $(PREBUILT_STATIC_LIBRARY)
- include $(CLEAR_VARS)
- LOCAL_MODULE := libB
- LOCAL_SRC_FILES := libB.a
- include $(PREBUILT_STATIC_LIBRARY)
- include $(CLEAR_VARS)
- LOCAL_MODULE := libC
- LOCAL_SRC_FILES := libC.a
- include $(PREBUILT_STATIC_LIBRARY)
- include $(CLEAR_VARS)
- LOCAL_MODULE := Test
- LOCAL_SRC_FILES := Test.c
- LOCAL_STATIC_LIBRARIES := libA libB libC
- LOCAL_LDLIBS := -llog
- include $(BUILD_SHARED_LIBRARY)
这次是真的OK 了 呵呵
android-ndk-r6b\samples\two-libs 没事还是要多看看例子哦
NDK 编译和使用静态库、动态库
情况一:编译静态库
情况二:编译动态库
情况三:编译动态库+静态库
情况四:已有第三方静态库(动态库),编译静态库(动态库)
默认所有代码和文件在$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
转自 http://blog.csdn.net/kangyaping/article/details/7096061
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