Hilfe bei GPS-Position

// imports

public class GPSTracker extends Activity
{
   
    // GUI-Elemente
    public RadioButton radioButtonGPS;
    public TextView textViewGPS;
    public RadioButton radioButtonManuell;
    public EditText EditTextManuellEingeben;
     
    /** Called when the activity is first created. */
    public void onCreate(Bundle saveInstanceState)
    {
        super.onCreate(saveInstanceState);
        setContentView(R.layout.xmlGPSTracking);
       
        radioButtonGPS = (RadioButton)findViewById(R.id.GPS_RadioButton);
        textViewGPS = (TextView)findViewById(R.id.GPS_TextView);
        radioButtonManuell = (RadioButton)findViewById(R.id.Manuell_RadioButton);
        EditTextManuellEingeben = (EditText)findViewById(R.id.Manuell_EditText);
         
        // Listener 
        radioButtonGPS.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                if (radioButtonGPS.isChecked())
                {
                    // GPS-Tracker wird aufgerufen
                    gpsTracker();
                }
                else if (!radioButtonGPS.isChecked() && radioButtonManuell.isChecked())
                {
                    EditTextManuellEingeben.setText("Hier Adresse eingeben!");
                    EditTextManuellEingeben.setEnabled(true);
                }   
            }
        });
 
    // Methode gpsTracker()
    private void gpsTracker()
    {
        LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);

        Criteria criteria = new Criteria();
        String provider = lm.getBestProvider(criteria, false);
       
        lm.requestLocationUpdates(provider,60000,1,locationListener);
    }
   
    // LocationListener
    private final LocationListener locationListener = new LocationListener()
    {
        public void onLocationChanged(Location l)
        {
            textViewGPS = new TextView(GPSTracker.this);  
            textViewGPS.setText("lat: " + l.getLatitude() + ", lon: " + l.getLongitude());
            setContentView(textViewGPS);
        }

        public void onProviderDisabled(String provider)
        {
          // TODO Auto-generated method stub
        }
       
        public void onProviderEnabled(String provider)
        {
          // TODO Auto-generated method stub
        }
        public void onStatusChanged(String provider, int status, Bundle extras)
        {
          // TODO Auto-generated method stub
        }
  };

  
}

lm.requestLocationUpdates(provider,60000,1,locationListener);