https://qooah.com/2012/05/23/%e5%90%84%e4%bd%8d%e8%ae%80%e8%80%85%e7%95%99%e6%84%8f%e6%83%a1%e6%84%8f%e7%a8%8b%e5%bc%8f%e6%8a%ab%e9%81%8a%e6%88%b2%e5%a4%96%e8%a1%a3%e8%ab%8b%e5%90%9b%e5%85%a5%e7%94%95-android-opfake%e4%bb%a5/