AndroidStudio使用Cmake編譯armeabi-v7a,arm64-v8a的so庫

使用AndroidStudio編譯armeabi-v7a,arm64-v8a庫文件步驟：

1.新建項目

 

 

2.修改CMakeLists.txt文件

# 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的最小版本號
cmake_minimum_required(VERSION 3.4.1)
#定義項目名稱,可以不定義
#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.

#設置so庫的輸出路徑
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_SOURCE_DIR}/libs/${ANDROID_ABI})




#設置編譯類型
#add_executable(demo demo.cpp) # 生成可執行文件
#生成動態共享庫
add_library( # 設置編譯成so庫的名稱
             native-lib

             # 生成動態庫或共享庫，此處如果SHARED改為STATIC，其含義是生成靜態庫
             SHARED

             # 提供一個需要編譯的源文件的相對路徑，native-lib.cpp就是需要編譯的源文件
             native-lib.cpp )

#明確指定編譯時需要編譯哪些源文件
#add_library(demo demo.cpp test.cpp util.cpp)

#aux_source_directory(dir VAR) 發現一個目錄下所有的源代碼文件並將列表存儲在一個變量中。
#例如：aux_source_directory(. SRC_LIST) # 搜索當前目錄下的所有.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.
#查找到指定的預編譯庫，並將它的路徑存儲在變量中
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.

#設置target需要鏈接的庫
target_link_libraries( # Specifies the target library.目標庫
                       native-lib

                       # Links the target library to the log library 目標庫需要鏈接的庫，log-lib是上面find_library指定的變量名
                       # included in the NDK.
                       ${log-lib} )

　　

3.修改app的build.gradle文件

 

 

 //ndk必須定義在defaultConfig目錄下,設置需要生成的cpu平台,以下這兩個就能夠兼容絕大多數的Android平台
        ndk{
            abiFilters 'armeabi-v7a','arm64-v8a'
        }

　　

4.執行編譯

 

 編譯后會在cpp文件夾下自動新建一個libs文件里面就會存放各個平台對應的動態共享so庫