https://blog.wongcw.com/2018/11/28/%e8%ab%be%e5%9f%ba%e4%ba%9e7-1%e9%96%8b%e5%a7%8b%e6%8e%a8%e9%80%81android-9-0%ef%bc%9a%e6%94%b9%e9%80%b2%e7%b3%bb%e7%b5%b1ui-%e8%87%aa%e9%81%a9%e6%87%89%e9%9b%bb%e6%b1%a0-%e6%95%b8%e5%ad%97%e5%81%a5/