android 手动编译 so文件

android studio 

下载安装cmake 和 ndk

先用javac -h 编译出 .h的头文件

新建CMakeLists.txt 文件

# cmake 最低版本需求
cmake_minimum_required(VERSION 3.13)
 
# 工程名称
project(cmake_study1)

// find_library(VAR name path)查找到指定的预编译库，并将它的路径存储在变量中。
// 默认的搜索路径为cmake 包含的系统库，因此如果是NDK的公共库只需要指定库的name即可。
# 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)

add_libary，find_libart(