https://qooah.com/2012/10/16/%e6%9c%80%e6%96%b0-android-4-1-2-%e7%b3%bb%e7%b5%b1%e6%9b%b4%e6%96%b0%e5%85%a7%e5%ae%b9%e8%a9%b3%e7%b4%b0%e4%bb%8b%e7%b4%b9%ef%bc%8c%e4%bb%a4%e4%bd%a0%e6%b8%85%e6%a5%9a%e4%ba%86%e8%a7%a3%e5%8d%87/