将第三方库 (libs.a) 与 NDK 链接
我正在构建一个使用第三方本地库的 Android apk，这些库位于静态对象代码库(.a 文件)中，我需要编写一个 JNI 包装器以在 Java 中访问这些函数.
I'm building an Android apk who uses some native libraries of a third party, these libs are in Static Object Code Library (.a files) and I need to write a JNI wrapper to access in Java these functions.
这些库已经用交叉编译器编译，并且是 Android 原生的.
Those libs are already compiled with a cross-compiler and are natively to Android.
如何编译链接到 .a libs 文件中的函数的 JNI 源代码?
How do I compile my JNI sources linking to the functions in the .a libs files?
这是我的 Android.mk
This is my Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_LDLIBS := -llog
LOCAL_MODULE := ndk1
LOCAL_SRC_FILES := native.c
include $(BUILD_SHARED_LIBRARY)
当我编译时，我只编译了 native.c 文件.
When I compile, I get only the native.c file compiled.
推荐答案
这样做.
我必须将这些库声明为模块.像下面这样.
I have to declare these libs as modules. Like the following.
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := curl
LOCAL_SRC_FILES := libcurl.a
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_STATIC_LIBRARY)
在与此 Android.mk 文件相同的文件夹中包含一个 libcurl.a 文件，以及一个带有标头的/include 文件夹.
With a libcurl.a file in the same folder as this Android.mk file, and a /include fodler with the headers.
现在在主模块中只需声明 lib，Android NDK 将处理其余部分.
Now in the main module just declare the lib and the Android NDK will take care of the rest.
LOCAL_PATH := $(call my-dir)
include $(call all-subdir-makefiles)
include $(CLEAR_VARS)
LOCAL_LDLIBS := -llog -ldl
LOCAL_MODULE := rmsdk
LOCAL_SRC_FILES := curlnetprovider.cpp native.c
LOCAL_STATIC_LIBRARIES := curl
include $(BUILD_SHARED_LIBRARY)
注意.. 在使用模块之前，您应该包含模块的 Android.mk 文件.我通过调用 all-subdir-makefiles 来做到这一点.
Note.. you should include the Android.mk file of the module before using it. I do that with the call all-subdir-makefiles.
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