Android popwindow 消失监听

LisviewPop.setOnDismissListener(new OnDismissListener() {
                @Override
                public void onDismiss() {
                        //改变显示的按钮图片为正常状态
                Log.d("room", "onTouchEventxx");
                top_btn.setBackgroundResource(R.drawable.home_icon_more_nor);
LisviewPop.dismiss();
                }
        });