https://blog.csdn.net/Skies_/article/details/109350500
1. ncnn编译
按官网提示，ncnn代码下有build.sh
2. android-studio，native code使用ncnn配置
a. 拷贝ncnn库
在${PROJECT_DIR}/app/src/main/cpp/下新建third_party/ncnn-lib文件夹，把编译、install出来的安卓库文件拷贝进去。目录结构：
b. CMakeLists.txt配置：
1 set(ncnn_DIR ${PROJECT_DIR}/app/src/main/cpp/third_party/ncnn-lib/${CMAKE_ANDROID_ARCH_ABI}/lib/cmake/ncnn) 2 find_package(ncnn REQUIRED) 3 message( STATUS "ncnn library status:" ) 4 message( STATUS " found: ${ncnn_FOUND}" ) 5 message( STATUS " version: ${NCNN_VERSION}" ) 6 message( STATUS " libraries: ${NCNN_LIBS}" ) 7 message( STATUS " include path: ${ncnn_INCLUDE_DIRS}" ) 8 include_directories("${PROJECT_DIR}/app/src/main/cpp/third_party/ncnn-lib/${CMAKE_ANDROID_ARCH_ABI}/include") 9 file(GLOB NCNN_LIBS ${PROJECT_DIR}/app/src/main/cpp/third_party/ncnn-lib/${CMAKE_ANDROID_ARCH_ABI}/lib/*.a) 10 set(DEPENDENCIES ${DEPENDENCIES} ${NCNN_LIBS})