https://qooah.com/2012/01/31/google-%e5%9c%a8-google-%e8%a8%ad%e7%bd%ae-android-%e9%96%8b%e7%99%bc%e8%80%85%e5%b0%88%e9%a0%81-%e6%af%8f%e9%80%a2%e9%80%b1%e4%b8%89%e7%82%ba%e4%bd%a0%e8%a7%a3%e7%ad%94%e9%96%8b%e7%99%bc%e9%9b%a3/