PopupWindow Android

//自分で見るためのもの.

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());  //        
        need_pop.setOutsideTouchable(true);
 
        need_pop.showAtLocation(View, Gravity.CENTER, 0, 0);//