PopupWindow点击外部区域不能消失的解决办法

private void showOrderByView() {// TODO Auto-generated method stubString[] items = new String[] { "智能排序", "好评优先", "离我最近", "优惠价最低" };LinearLayout lyt = (LinearLayout) LayoutInflater.from(getActivity()).inflate(R.layout.test, null);ListView list = (ListView) lyt.findViewById(R.id.listView1);list.setSelector(new ColorDrawable(Color.TRANSPARENT));list.setAdapter(new ListAdapter(getActivity(), items));mPopWin = new PopupWindow(lyt, view.getWidth() / 2,LayoutParams.WRAP_CONTENT, true);mPopWin.setBackgroundDrawable(new BitmapDrawable());mPopWin.showAsDropDown(lblOrderBy);mPopWin.setOutsideTouchable(true);mPopWin.setFocusable(true);mPopWin.update();}

setBackgroundDrawable方法一点要在new PopupWindow后立即调用！！