AndroidStudio使用Cmake编译armeabi-v7a,arm64-v8a的so库

使用AndroidStudio编译armeabi-v7a,arm64-v8a库文件步骤：

1.新建项目

 

 

2.修改CMakeLists.txt文件

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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. #指定cmake的最小版本号 cmake_minimum_required(VERSION 3.4.1) #定义项目名称,可以不定义 #project(demo) # 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.   #设置so库的输出路径 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/libs/${ANDROID_ABI})         #设置编译类型 #add_executable(demo demo.cpp) # 生成可执行文件 #生成动态共享库 add_library( # 设置编译成so库的名称              native-lib                # 生成动态库或共享库，此处如果SHARED改为STATIC，其含义是生成静态库              SHARED                # 提供一个需要编译的源文件的相对路径，native-lib.cpp就是需要编译的源文件              native-lib.cpp )   #明确指定编译时需要编译哪些源文件 #add_library(demo demo.cpp test.cpp util.cpp)   #aux_source_directory(dir VAR) 发现一个目录下所有的源代码文件并将列表存储在一个变量中。 #例如：aux_source_directory(. SRC_LIST) # 搜索当前目录下的所有.cpp文件 #add_library(demo ${SRC_LIST})       # 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. #查找到指定的预编译库，并将它的路径存储在变量中 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.   #设置target需要链接的库 target_link_libraries( # Specifies the target library.目标库                        native-lib                          # Links the target library to the log library 目标库需要链接的库，log-lib是上面find_library指定的变量名                        # included in the NDK.                        ${log-lib} )

　　

3.修改app的build.gradle文件

 

 

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//ndk必须定义在defaultConfig目录下,设置需要生成的cpu平台,以下这两个就能够兼容绝大多数的Android平台        ndk{            abiFilters 'armeabi-v7a','arm64-v8a'        }

　　

4.执行编译

 

 编译后会在cpp文件夹下自动新建一个libs文件里面就会存放各个平台对应的动态共享so库