NDK开发 - Android Studio 使用CMake生成SO库

直接进入主题

• 安装插件

  
  
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• 创建项目，直接加上include C++ support

  
  
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• 创建一个调用SO库函数的类

  
  
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• 使用命令行进入java这个文件夹，使用命令javah -jni com.example.apple.ndktest.NDKManager，生成.h头文件

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• 在自己创建的cpp文件中导入上面的头文件并实现

  
  
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• 配置build.grade

  
  
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• 配置CMakeLists.txt（附链接第三方库方法-openssl）

  
  
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# For more information about using CMake with Android Studio, read the
# documentation: https://d.android.com/studio/projects/add-native-code.html

# Sets the minimum version of CMake required to build the native library.

cmake_minimum_required(VERSION 3.4.1)

#设置JNI变量名的值为${PROJECT_SOURCE_DIR}/src/main/jni
set(JNI /${PROJECT_SOURCE_DIR}/src/main/jni)

# Creates and names a library, sets it as either STATIC
# or SHARED, and provides the relative paths to its source code.
# You can define multiple libraries, and CMake builds them for you.
# Gradle automatically packages shared libraries with your APK.

add_library( # Sets the name of the library.
             #设置Lib库的名字
             nativeLib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
            # 源文件（实现的文件）
             src/main/cpp/nativeLib.cpp )


#加载第三方库 SHARED->.so 或者 STATIC->.a
add_library(openssl STATIC IMPORTED )
#配置加载头文件
include_directories( ${JNI}/include)
#引入第三方.a库
set_target_properties(openssl PROPERTIES IMPORTED_LOCATION ${JNI}/libs/${ANDROID_ABI}/libcrypto.a)




# Searches for a specified prebuilt library and stores the path as a
# variable. Because CMake includes system libraries in the search path by
# default, you only need to specify the name of the public NDK library
# you want to add. CMake verifies that the library exists before
# completing its build.

find_library( # Sets the name of the path variable.
              log-lib

              # Specifies the name of the NDK library that
              # you want CMake to locate.
              log )

# Specifies libraries CMake should link to your target library. You
# can link multiple libraries, such as libraries you define in this
# build script, prebuilt third-party libraries, or system libraries.

target_link_libraries( # Specifies the target library.
                       #设置Lib库的名字(System.Loadlibrary("libraryName")的libraryName)
                       nativeLib
                       openssl

                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} )

• 最后点击Make Project生成SO库

  
  
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• 选择编译Debug还是Release版本后，点击Make Project，生成对应版本SO库

  
  
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项目地址->NDKTest