参考： https://developer.chrome.com/multidevice/android/customtabs https://github.com/GoogleChrome/custom-tabs-client http://qq157755587.github.io/2016/08/12/custom-tabs-best-practices/ http://www.jianshu.com/p/f952d9c71d91 http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2015/0914/3451.html
