/**     * 让popupwindow以外区域阴影显示     * @param popupWindow     */    private void popOutShadow(PopupWindow popupWindow) {        WindowManager.LayoutParams lp = activity.getWindow().getAttributes();        lp.alpha = 0.7f;//设置阴影透明度        activity.getWindow().setAttributes(lp);        popupWindow.setOnDismissListener(new PopupWindow.OnDismissListener() {            @Override            public void onDismiss() {                WindowManager.LayoutParams lp = activity.getWindow().getAttributes();                lp.alpha = 1f;                activity.getWindow().setAttributes(lp);            }        });    }