PopupWindow Android

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// 用来自己看的。
PopupWindow need_pop;   RelativeLayout  dialogView = (RelativeLayout) LayoutInflater.from(this).inflate(R.layout.need_pop, null);        RelativeLayout item1 = (RelativeLayout) dialogView.findViewById(R.id.need_pop_item1);        item1.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                // TODO Auto-generated method stub                /**dosomething*/                     }        });        RelativeLayout item2 = (RelativeLayout) dialogView.findViewById(R.id.need_pop_item2);        item2.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                // TODO Auto-generated method stub                /**dosomething*/             }        });        RelativeLayout item3 = (RelativeLayout) dialogView.findViewById(R.id.need_pop_item3);        item3.setOnClickListener(new OnClickListener() {                        @Override            public void onClick(View v) {                // TODO Auto-generated method stub                /**dosomething*/                           }        });            need_pop = new PopupWindow(dialogView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);        need_pop.setBackgroundDrawable(new BitmapDrawable());  //点击其他区域消失        need_pop.setOutsideTouchable(true);         need_pop.showAtLocation(View, Gravity.CENTER, 0, 0);//居中
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