2017/12/27** 增加演示demo:DismissControlPopupFrag增加两个方法用于touchEvent监听:onTouchEvent()&onOutSideTouch()HackPopupDecorView继承ViewGroup而非FrameLayout,以解决PopupWindow的decorView.getLayoutParams()无法强转为WindowManager.LayoutParams的异常其余问题暂时没发现