05-03 07:34:15.933: E/AndroidRuntime(377): FATAL EXCEPTION: main
05-03 07:34:15.933: E/AndroidRuntime(377): java.lang.RuntimeException: Unable to start activity ComponentInfo{taxi.project/taxi.project.locationActivity}: java.lang.NullPointerException
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1647)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.os.Looper.loop(Looper.java:130)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.ActivityThread.main(ActivityThread.java:3683)
05-03 07:34:15.933: E/AndroidRuntime(377):  at java.lang.reflect.Method.invokeNative(Native Method)
05-03 07:34:15.933: E/AndroidRuntime(377):  at java.lang.reflect.Method.invoke(Method.java:507)
05-03 07:34:15.933: E/AndroidRuntime(377):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
05-03 07:34:15.933: E/AndroidRuntime(377):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
05-03 07:34:15.933: E/AndroidRuntime(377):  at dalvik.system.NativeStart.main(Native Method)
05-03 07:34:15.933: E/AndroidRuntime(377): Caused by: java.lang.NullPointerException
05-03 07:34:15.933: E/AndroidRuntime(377):  at taxi.project.locationActivity.onCreate(locationActivity.java:55)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-03 07:34:15.933: E/AndroidRuntime(377):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1611)
이렇게 로그캣이뜹니다..

public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.mapview);

  mapView = (MapView) findViewById(R.id.mapview);
  mapView.setBuiltInZoomControls(true);
  // load GPS( GPS 로 부터 현재의 내 위치 가져오기 )
  loadGps();// location 값할당
  List<Overlay> mapOverlays = mapView.getOverlays();
  Drawable drawable = this.getResources().getDrawable(R.drawable.ic_launcher);
  MyItemizedOverlay itemizedoverlay = new MyItemizedOverlay(drawable,this);
  GeoPoint point = new GeoPoint((int)(37.5643406*1E6),(int)(126.9756087*1E6));
  
  

  //GeoPoint point = new GeoPoint((int) (location.getLatitude() * 1E6),(int) (location.getLongitude() * 1E6));
  OverlayItem overlayitem = new OverlayItem(point, "Hi Pondol!","I'm in Seoul!");
  itemizedoverlay.addOverlay(overlayitem);
  mapController = mapView.getController();
  mapController.setCenter(point);
  mapController.setZoom(15); //
  mapController.animateTo(point);
  mapOverlays.add(itemizedoverlay);
  
  latPoint = location.getLatitude();
  Log.i("aa", ""+latPoint);
  lngPoint = location.getLongitude();
  Log.i("bb", ""+lngPoint);
  
    mTimer = new Timer();
      mTimer.schedule(new TimerTask() {
       @Override
       public void run() {
        TimerMethod(); // 지정된 시간에 실행할 메소드
       }
      }, 3000); // 밀리세컨드 단위로 딜레이될 시간
     }

     private void TimerMethod() {
//      Intent intent = new Intent(main.this, EmpActivity.class);
//      startActivity(intent);
//   count++;
//   Toast.makeText(locationActivity.this, "good", 0).show();
//   TextView a = (TextView)findViewById(R.id.text);
//   a.setText(count);
      mTimer.cancel(); // 타이머를 취소하지 않으면 계속 실행이 된다.
     // finish(); // finish를 하지 않으면 뒤로가기 버튼을 누를 때 스플래쉬 화면으로 간다.
     } 소스는 이렇게짯어요..!!