// 命名规范化。成员变量权限修饰改为private
// 私有内部變量替換為方法獲取
// support setPopupWindowFullScreen()
// add fadein toggle
// add anima is playing flag
// remove compile in gradle
// add dismisswithoutanima method & change maxVer from 23 to 21
// set minsdk to api 11