https://blog.wongcw.com/2018/10/24/%e6%97%a7%e6%ac%bepixel%e7%bb%88%e8%8e%b7pixel-3%e7%9a%84camera%e6%96%b0%e5%8a%9f%e8%83%bd-wear-os%e6%96%b0%e5%a2%9e%e5%8f%96%e6%99%af%e5%99%a8%e7%ad%89%e7%89%b9%e6%80%a7/