Ein Element aus der Liste auswählen ??

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;


public class TestActivity extends Activity implements OnItemSelectedListener{
	String [] eintrag = {"test23", "hallo", "was"};
	ListView lv;
				/** Called when the activity is first created. */
			@Override
				public void onCreate(Bundle savedInstanceState) {
			    	super.onCreate(savedInstanceState);
			    	setContentView(R.layout.main);
			    	lv= (ListView)findViewById(R.id.listView1);
			    	lv.setAdapter( new ArrayAdapter<String> (this, android.R.layout.simple_list_item_1, eintrag));
			   	
			}
				@Override
				public void onItemSelected(AdapterView<?> arg0, View arg1,
						int arg2, long arg3) {
					// TODO Auto-generated method stub
				}
				@Override
				public void onNothingSelected(AdapterView<?> arg0) {
					// TODO Auto-generated method stub   
				}   		
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
   android:id="@+id/main"
   xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_height="fill_parent"
   android:layout_width="fill_parent"
>
   <ListView
  	android:id="@+id/listView1"
  	android:layout_height="wrap_content"
  	android:layout_width="match_parent"
   ></ListView>
</LinearLayout>