https://qooah.com/2012/11/02/symantec-%e6%8f%90%e9%86%92%e7%94%a8%e6%88%b6%ef%bc%9a-android%e6%83%a1%e6%84%8f%e7%a8%8b%e5%bc%8f%e9%a8%99%e8%a1%93%e5%b1%a4%e5%87%ba%e4%b8%8d%e7%aa%ae/