Android ListView's setOnItemClickListener from PopupWindow not called

I'm trying to show a ListView from a PopupWindow. but when I'm try to call ListView's setOnItemClickListener nothing to haapen. Here It Java file PopupWindowActivity.java ``` public class PopupWindowActivity extends Activity { String[] data = { "DATA 1", "DATA 2", "DATA 3", "DATA 4", "DATA 5", "DATA 6" }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.a); final Button btnOpenPopup = (Button) findViewById(R.id.openpopup); btnOpenPopup.setOnClickListener(new Button.OnClickListener() { public void onClick(View arg0) { LayoutInflater layoutInflater = (LayoutInflater) getBaseContext() .getSystemService(LAYOUT_INFLATER_SERVICE); View popupView = layoutInflater.inflate(R.layout.main, null); final PopupWindow popupWindow = new PopupWindow(popupView, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); ListView listView = (ListView) popupView.findViewById(R.id.listView1); listView.setAdapter(new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1,data)); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub System.out.println("Item Clicked"); popupWindow.dismiss(); } }); popupWindow.showAsDropDown(btnOpenPopup, 20, -5); } }); } ``` } Here it is first xml file a.xml ``` <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <Button android:id="@+id/openpopup" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Open Popup Window" /> </LinearLayout> ``` Here it inflate xml file main.xml ``` <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="@drawable/recording" android:orientation="vertical" > <RelativeLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_marginBottom="30sp" android:layout_marginLeft="30sp" android:layout_marginRight="30sp" android:layout_marginTop="100sp" > <ListView android:id="@+id/listView1" android:layout_width="fill_parent" android:layout_height="wrap_content" android:cacheColorHint="#00000000" > </ListView> </RelativeLayout> </LinearLayout> ``` What am I doing wrong? Thanks