如何用CMake构建Android C++库 https://fireflytech.org/2017/11/04/compiling-cc-libraries-for-android/ https://blog.csdn.net/xhp2014/article/details/100548816 https://blog.csdn.net/u014800493/article/details/54948330 https://developer.android.com/ndk/guides/cmake#command-line