https://blog.faceutil.com/2017/03/16/%ec%95%88%eb%93%9c%eb%a1%9c%ec%9d%b4%eb%93%9c-apk-manager-%eb%a5%bc-%ec%9d%b4%ec%9a%a9%ed%95%9c-%ec%96%b4%ed%94%8c-%ec%95%84%ec%9d%b4%ec%bd%98-%eb%b3%80%ea%b2%bd-%ec%98%88%ec%a0%9c-%e3%81%9a/