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Android-CMakeLists.txt 链接第三方库(动态或者静态库)到自己的生成库中

程序员文章站 2022-05-14 08:06:09
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最近在做关于NDK开发的项目，编译方式通过cmake。
如何将第三方动态链接库连接到自己生成的动态库中，按照以下步骤：

1.首先看目录结构：首先将第三方库复制到jniLibs下，并创建对应的CUP平台目录

Android-CMakeLists.txt 链接第三方库(动态或者静态库)到自己的生成库中

2. CMakeLists.txt

方式一：

# 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)

message(STATUS "******************************************************************")
message(STATUS "CMAKE_SOURCE_DIR->" ${CMAKE_SOURCE_DIR})
message(STATUS "PROJECT_SOURCE_DIR->)" ${PROJECT_SOURCE_DIR})
message(STATUS "******************************************************************")

#1.搜索源文件并赋值给变量名
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app CLIENT_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/user/source USER_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/user USER_OP_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/device/source DEVICE_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/device DEVICE_OP_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/event/source EVENT_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/event EVENT_OP_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/tools TOOLS_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/helper HELPER_SRC)

#2.设置源文件到统一的变量
set(DIR_SRCS ${CLIENT_SRC} ${USER_SRC} ${USER_OP_SRC}
   ${DEVICE_SRC} ${DEVICE_OP_SRC} ${EVENT_SRC} ${EVENT_OP_SRC} ${TOOLS_SRC} ${HELPER_SRC})

#3.设置第三方库头文件所在位置
include_directories(${CMAKE_SOURCE_DIR}/src/main/cpp/thirdInclude/)

#4.设置第三方库头库所在位置
link_directories(${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/)

#5.对应的库
link_libraries(SKYhttpClient.so SKYmxml.so)

# 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.

#6.创建动态库
add_library( # Sets the name of the library.
             skyqcloud-sdk

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             ${DIR_SRCS}
             ${CMAKE_SOURCE_DIR}/src/main/cpp/skyqc_sdk_native.cpp)

# 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.

#7.链接需要的第三方动态库
target_link_libraries( # Specifies the target library.
                       skyqcloud-sdk

                       #the third library
                       SKYhttpClient
                       SKYmxml

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

方式二：

# 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)

message(STATUS "******************************************************************")
message(STATUS "CMAKE_SOURCE_DIR->" ${CMAKE_SOURCE_DIR})
message(STATUS "PROJECT_SOURCE_DIR->)" ${PROJECT_SOURCE_DIR})
message(STATUS "******************************************************************")

#1.搜索源文件并赋值给变量名
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app CLIENT_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/user/source USER_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/user USER_OP_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/device/source DEVICE_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/device DEVICE_OP_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/event/source EVENT_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/event EVENT_OP_SRC)

aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/tools TOOLS_SRC)
aux_source_directory(${CMAKE_SOURCE_DIR}/src/main/cpp/common/app/helper HELPER_SRC)

#2.设置源文件到统一的变量
set(DIR_SRCS ${CLIENT_SRC} ${USER_SRC} ${USER_OP_SRC}
   ${DEVICE_SRC} ${DEVICE_OP_SRC} ${EVENT_SRC} ${EVENT_OP_SRC} ${TOOLS_SRC} ${HELPER_SRC})

#3.设置第三方库头文件所在位置
include_directories(${CMAKE_SOURCE_DIR}/src/main/cpp/thirdInclude/)

#4.导入第三方动态库
# 添加第三方动态库
add_library(SKYhttpClient
             SHARED
             IMPORTED)

# 设置第三方动态库属性（存储位置） armeabi-v7a
set_target_properties(SKYhttpClient
                      PROPERTIES IMPORTED_LOCATION
                      ${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libSKYhttpClient.so)

# 添加第三方动态库
add_library(SKYmxml
             SHARED
             IMPORTED)

# 设置第三方动态库属性（存储位置）
set_target_properties(SKYmxml
                      PROPERTIES IMPORTED_LOCATION
                      ${CMAKE_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libSKYmxml.so)


# 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.

#6.创建动态库（自己将要生成的动态库）
add_library( # Sets the name of the library.
             skyqcloud-sdk

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             ${DIR_SRCS}
             ${CMAKE_SOURCE_DIR}/src/main/cpp/skyqc_sdk_native.cpp)

# 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.

#6.链接需要的第三方动态库
target_link_libraries( # Specifies the target library.
                       skyqcloud-sdk

                       #the third library
                       SKYhttpClient
                       SKYmxml

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

若第三方库初始化等失败,则需要在Java文件中设置,类似：

static {
      System.loadLibrary("device");
      System.loadLibrary("ControllerAdapter");
  }

或者在初始化库函数之前,在cpp中:

#include <dlfcn.h>  
      
void *handle;  
  
handle = dlopen ("libm.so", RTLD_NOW, RTLD_LOCAL);  
if (!handle) 
{  
	fprintf (stderr, "%s ", dlerror());  
    exit(1);  
}
相关标签： 基础 android

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