gps프로그램 작성하는데요 이클립스를 이용하는데

아무런 오류발생하지 않는데 에뮬레이터로 돌리면

The application MyLocationDemoActivity01(process ac.kr.MyLocationDemoActivity01) has stopped unexpectedly.

please try again

메시지가 뜹니다

소스코드는 아래와 같구요 무슨 문제인지 모르겠네요 ㅠ

도와주세요

package kr.ac.MyLocationDemoActivity01;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;

import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.widget.Toast;
import ac.kr.MyLocationDemoActivity01.R;
import android.os.Bundle;

public class MyLocationDemoActivity01Main extends MapActivity {
    /** Called when the activity is first created. */
    
    MapView mapView = null;
   
    MyLocationOverlay whereAmI = null;
    LocationManager locMgr = null;
    LocationListener locListener = null;
   
    @Override
    protected boolean isLocationDisplayed() {
     return whereAmI.isMyLocationEnabled();
    }
   
    @Override
 protected boolean isRouteDisplayed() {
  // TODO Auto-generated method stub
  return false;
 }
   
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        mapView = (MapView)findViewById(R.id.geoMap);
        mapView.setBuiltInZoomControls(true);
        mapView.getController().setZoom(15);
       
        whereAmI = new MyLocationOverlay(this, mapView);
        mapView.getOverlays().add(whereAmI);
        mapView.postInvalidate();
       
        locMgr = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
        locListener = new LocationListener() {
         public void onLocationChanged(Location location){
          showLocation(location);
         }
         
         public void onProviderDisabled(String provider)
         {
         }
         
         public void onProviderEnabled(String provider)
         {
         }
         
         public void onStatusChanged(String provider, int status, Bundle extras)
         {
         }
         
         };
    }
         
   
   @Override
   public void onResume() {
    super.onResume();
    Location lastLoc = locMgr.getLastKnownLocation(LocationManager.GPS_PROVIDER);
    showLocation(lastLoc);
    locMgr.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locListener);
    whereAmI.enableMyLocation();
    whereAmI.runOnFirstFix(new Runnable() { public void run(){ mapView.getController().setCenter(whereAmI.getMyLocation());
    }
    });
   }
   
   @Override
   public void onPause(){
    super.onPause();
    locMgr.removeUpdates(locListener);
    whereAmI.disableMyLocation();
   }
   
   private void showLocation(Location location) {
    if (location !=null)
    {
     double lat = location.getLatitude();
     double lng = location.getLongitude();
     GeoPoint myLocation = new GeoPoint((int)(lat*1000000),(int)(lng*1000000));
     Toast.makeText(getBaseContext(), "New location latitude [" + lat + "] longitude [" + lng + "]", Toast.LENGTH_SHORT).show();
     mapView.getController().animateTo(myLocation);
    }
   }   
}