PopupWindow+ListView+OnItemClick无效解决思路

PopupWindow+ListView+OnItemClick无效
代码如下:

@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		final Button button1 = (Button) findViewById(R.id.button1);


		button1.setOnClickListener(new OnClickListener() {


			public void onClick(View v) {

				// TODO Auto-generated method stub

				// 生成ListView

				ListView listview = new ListView(MainActivity.this);

				String strs = new String;

				strs = "asfsafdasdf";

				strs = "桂　地要仍地沃尔夫仍";

				strs = "asfsafdasdf";

				 ArrayAdapter<String> adapter=new

				 ArrayAdapter<String>(MainActivity.this,R.layout.common_poplist_item_single_textview,R.id.content,strs);

//				ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, R.layout.common_poplist_item_single_textview, strs);

				listview.setAdapter(adapter);

				listview.setOnItemClickListener(new OnItemClickListener() {


					public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

						// TODO Auto-generated method stub

						System.out.println(position);

					}

				});


				PopupWindow window = new PopupWindow(MainActivity.this);

				// 设置宽高

				window.setWidth(200);

				window.setHeight(120);

				// 填充

				window.setContentView(listview);

				// 外部可部

				window.setOutsideTouchable(true);

				// 加了下面这行，onItemClick才好用

				window.setFocusable(true);

				window.showAsDropDown(button1);


			}

		});

	}

经测试,发现2.3的真机上OnItemClick能触发..但是在4.1,4.2的真机上测试无均反应..麻烦各位帮我验证一下是否如此,该如何解决.
------解决方案--------------------
点下按钮直接显示popwindow就好了
------解决方案--------------------
你把它写到外面试试呀
------解决方案--------------------