Android onclick-Ereignis auf benutzerdefinierte ListView-adapter funktioniert nicht

Habe ich baute eine benutzerdefinierte ListAdapter und habe Probleme mit der onclick Veranstaltung
für jede einzelne Zeile. Ich möchte, um etwas von dem Inhalt des angeklickten Zeile für
mit es später in einem anderen Aktivität:

public class MainActivity extends Activity {

//ArrayList of type "Person". We are making not a list of string, sondern eine list of persons
ArrayList<Person> arrayOfWebData = new ArrayList<Person>();

class Person{
    public String person_id;
    public String name;
    public String birthday;
    public String favorite_color;
    public String profilbild;
}

//This is our new Adapter:
FancyAdapter aa = null;

//For each row we returned until we use the array to create our person obj
static ArrayList<String> resultRow;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    new getJson().execute();
}

//Params,Progress,Result
private class getJson extends AsyncTask<Void,Void,Void>
{
    @Override
    protected Void doInBackground(Void... arg0) {
        String result = "";
        try{
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost("xxxxx");
            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();
            InputStream is = httpEntity.getContent();
            //Convert response to String:
            try{
                BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
                StringBuilder sb = new StringBuilder();
                String line = null;

                while((line = reader.readLine()) != null){
                    sb.append(line+"\n");
                }
                is.close();
                result = sb.toString();
            }catch(Exception e){
                e.printStackTrace();
            }
        }catch(Exception e){
            e.printStackTrace();
        }
        //Parse JSON:
        try{
            JSONArray jArray = new JSONArray(result);
            for(int i = 0;i < jArray.length();i++)
            {
                //Get our object, this is on persons data:
                JSONObject json_data = jArray.getJSONObject(i);
                //Create a new person:
                Person resultRow = new Person();
                //Set thats persons attributes:
                resultRow.person_id = json_data.getString("id");
                resultRow.name = json_data.getString("name");
                resultRow.favorite_color = json_data.getString("favorite_color");
                resultRow.birthday = json_data.getString("birthday");
                resultRow.profilbild = json_data.getString("profilbild");
                arrayOfWebData.add(resultRow);
            }   
        }catch(Exception e){
            e.printStackTrace();
        }
        return null;    
    }
    @Override
    protected void onPostExecute(Void result) {
        //TODO Auto-generated method stub
        super.onPostExecute(result);
        populateListView();
    }   
}


public void populateListView()
{
    final ListView myListView = (ListView)findViewById(R.id.myListView);
    //initialite FancyAdapter object:
    aa = new FancyAdapter();
    myListView.setAdapter(aa);  

    //Click on ListView Row:
    myListView.setOnItemClickListener(new AdapterView.OnItemClickListener() 
    {
          @Override
          public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) 
          {
                 Object o = myListView.getItemAtPosition(position);
                //Here i want have values of the clicked row,- like the name and/or id...,- but i get the following:
                //Output o.toString(): com.example.customlistview.MainActivity$Person@41252310
                Log.i("TEST", o.toString()); 

                //Here i intend to Start a new Activity passing the "name" of the user (and/or id ...) to the new activity
          }
    }); 
}


class FancyAdapter extends ArrayAdapter<Person>
{
    FancyAdapter(){
        super(MainActivity.this,android.R.layout.simple_list_item_1,arrayOfWebData);
        //imageLoader = new ImageLoader(MainActivity.this);
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        final ViewHolder holder;
        if(convertView == null){
            LayoutInflater inflater = getLayoutInflater();
            convertView = inflater.inflate(R.layout.row3, null);
            holder = new ViewHolder(convertView);
            convertView.setTag(holder); 
        }else{
            holder = (ViewHolder)convertView.getTag();
        }
        holder.populateFrom(arrayOfWebData.get(position));
        return convertView; 
    }
}

class ViewHolder
{
    public TextView name = null;
    public TextView birthday = null;
    public TextView favorite_color = null;
    public ImageView profilbild = null;
    //public ImageLoader imageLoader;
    ImageLoader imageLoader = new ImageLoader(MainActivity.this);

    ViewHolder(View row){
        name = (TextView)row.findViewById(R.id.name);
        birthday = (TextView)row.findViewById(R.id.birthday);
        favorite_color = (TextView)row.findViewById(R.id.favorite_color);
        profilbild = (ImageView)row.findViewById(R.id.imageView1);  
    }
    //Notice we have to change our populateFrom() to take an argument of type "Person"
    void populateFrom(Person r){
        name.setText(r.name);
        birthday.setText(r.birthday);
        favorite_color.setText(r.favorite_color);
        imageLoader.DisplayImage(r.profilbild, profilbild); 
    }   
}

Bitte haben Sie einen Blick auf die populateListView() Methode.
Wann läuft die app und ich auf eine Zeile klicken, wird die Ausgabe sehe ich im Log.ich ist die folgende:

//Ausgabe o.toString():

com.Beispiel.customlistview.MainActivity$Person@41252310 Melden.ich("TEST", o.toString());

Aber ich möchte ein paar Inhalte aus der Zeile, e.g den Namen oder die id.

Wie kann ich das tun ?