https://qooah.com/2012/10/27/%e5%86%8d%e6%9c%89-nexus-10-%e7%9c%9f%e6%a9%9f%e7%85%a7%e4%bb%a5%e5%8f%8aandroid-4-2%e6%88%aa%e5%b1%8f%e6%b4%a9%e9%9c%b2/