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Android Threads and Services Bound Services Binding to a Service

Seeing compiler issue "cannot find symbol startService(intent)"

The compilation fails with message "cannot find symbol startService(intent);"

MainActivity.java
public class MainActivity extends Activity {
  int latitude;
  int longitude;
  boolean isBound;

  ServiceConnection serviceConnection = new ServiceConnection() {
    public void onServiceConnected(ComponentName className, IBinder service) {
      isBound = true;
    }
    public void onServiceDisconnected(ComponentName className) {
      isBound = false;
    }
  };

  @Override
  public void onCreate(Bundle savedInstanceState) {
    setContentView(R.layout.activity_main);

    Button updateLocationButton = (Button) findViewById(R.id.update_button);
    updateLocationButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v){
        Intent intent =  new Intent(MainActivity.this, GeolocationService.class);
        startService(intent);
      }
    });
  } 

  public void onStart() {
    super.onStart(); 
    Intent intent =  new Intent(this, GeolocationService.class);
    bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);
  }
  public void onStop() {
    super.onStop(); 
    if(isBound) {
      unbindService(serviceConnection);
    }
  }
}
GeolocationService.java
public class GeolocationService extends Service {

    @Override
    public IBinder onBind(Intent intent) {
      return null;
    }

    //Client methods
    public int getLatitude() { return getLat(); }    
    public int getLongitude() { return getLng(); }
}