问未调用onLocationChanged

EN

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_locate_me);

    createLocationRequest();
  buildGoogleApiClient();

    map = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();

    MapFragment mapFragment = ((MapFragment) getFragmentManager().findFragmentById(R.id.map));
    mapFragment.setRetainInstance(true);
}

@Override
protected void onStart() {
    super.onStart();
    if (mGoogleApiClient != null) {
        mGoogleApiClient.connect();
    }
}

protected synchronized void buildGoogleApiClient() {
    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(LocationServices.API)
            .build();
}

protected void createLocationRequest() {
    mLocationRequest = new LocationRequest();
    mLocationRequest.setInterval(10000);
    mLocationRequest.setFastestInterval(5000);
    mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
}

@Override
public void onConnected(Bundle bundle) {
    if (mRequestingLocationUpdates) {
        startLocationUpdates();
    }
}

@Override
public void onConnectionSuspended(int i) {
}

@Override
public void onLocationChanged(Location location) {
    mCurrentLocation = location;

    displayMessage("message","my position changed");

}


protected void startLocationUpdates() {
    LocationServices.FusedLocationApi.requestLocationUpdates(
            mGoogleApiClient, mLocationRequest, this);
}


@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}

private void displayMessage(String title, String message) {
   //displaying a message
}


@Override
protected void onPause() {
    super.onPause();
    stopLocationUpdates();
}

protected void stopLocationUpdates() {
    LocationServices.FusedLocationApi.removeLocationUpdates(
            mGoogleApiClient, this);
}

@Override
public void onResume() {
    super.onResume();
    if (mGoogleApiClient.isConnected() && !mRequestingLocationUpdates) {
        startLocationUpdates();
    }
}