https://qooah.com/2011/08/21/android-%e5%9c%a8%e6%be%b3%e6%b4%b2%e5%b8%82%e5%a0%b4%e4%bd%94%e6%9c%89%e7%8e%87%e8%b6%85%e9%81%8eios/