popupwindow的使用

		//给条目添加点击监听
		lv.setOnItemClickListener(new OnItemClickListener(){
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
				dismissPw();
				contentView = View.inflate(AppManger_Activity.this,R.layout.app_manager_popupwindow,null);
				pw = new PopupWindow(contentView,LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
				pw.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
				int[] location = new int[2];
				//得到contentView在显示的位置
				view.getLocationInWindow(location);
				//指定显示在父控件的那个位置
				pw.showAtLocation(parent, Gravity.LEFT+Gravity.TOP, 60,location[1] );
				
			}
		});