JNI 相关CmakeList.txt 配置

首先需要进入当前Module的Gradle.Build  设置编译CmakeList  及 cpp的编译环境

defaultConfig {

//        externalNativeBuild {
            cmake {
                cppFlags "-frtti -fexceptions"
            }
//            cmake {
//                cppFlags "-std=c++11 -frtti -fexceptions" // 根据情况设置
//                abiFilters 'arm64-v8a' // 根据情况设置 'x86', 'armeabi-v7a',  目前orc 只支持识别
//            }
//        }

}

android{

//方法 2
//    externalNativeBuild {
//        cmake {
//            path "CMakeLists.txt"
//        }
//    }

}

# 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.
#设置OpenCv sdk的路径变量 eg:   Users/apple/Downloads/OpenCV-android-sdk/
set(pathToOpenCv E:/AS/xxx/OpenCV-android-sdk)
#so库的输出路径
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY
   ${PROJECT_SOURCE_DIR}/libs/${ANDROID_ABI})

cmake_minimum_required(VERSION 3.4.1)
#支持-std=gnu++11
set(CMAKE_VERBOSE_MAKEFILE on)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")

#配置加载native依赖
include_directories(${pathToOpenCv}/sdk/native/jni/include)

#动态方式加载
add_library(lib_opencv STATIC IMPORTED )

#引入libopencv_java3.so文件
set_target_properties(lib_opencv PROPERTIES IMPORTED_LOCATION ${PROJECT_SOURCE_DIR}/src/main/jniLibs/${ANDROID_ABI}/libopencv_java3.so )

# 定义添加第三方so的路径 path_to_so
set(path_to_so E:/AS/xxx/app/libs)
#动态方式加载
add_library(libspen STATIC IMPORTED )
#设置 libseetanet2.so 库
set_target_properties(libspen PROPERTIES IMPORTED_LOCATION
        ${path_to_so}/${ANDROID_ABI}/xxx.so)


#官方配置 隐藏
#find_package(OpenCV REQUIRED)



# 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.
# 自己的源文件 设置库名称
add_library( # Sets the name of the library.
             native-lib

             # Sets the library as a shared library.
             SHARED

             # Provides a relative path to your source file(s).
             src/main/cpp/native-lib.cpp
             #src/main/cpp/xxx.h
            )

# 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.
# 链接库
target_link_libraries( # Specifies the target library.
                       native-lib
                       OpenSLES
                       libspen
                       # Links the target library to the log library
                       # included in the NDK.
                       ${log-lib} android -ljnigraphics lib_opencv)

本文地址：https://blog.csdn.net/qq_32216895/article/details/108143569