Calculating Directions with Google Directions API

UserListFragment.java

private void calculateDirections(Marker marker){
    Log.d(TAG, "calculateDirections: calculating directions.");

    com.google.maps.model.LatLng destination = new com.google.maps.model.LatLng(
            marker.getPosition().latitude,
            marker.getPosition().longitude
    );
    DirectionsApiRequest directions = new DirectionsApiRequest(mGeoApiContext);

    directions.alternatives(true);
    directions.origin(
            new com.google.maps.model.LatLng(
                    mUserPosition.getGeo_point().getLatitude(),
                    mUserPosition.getGeo_point().getLongitude()
            )
    );
    Log.d(TAG, "calculateDirections: destination: " + destination.toString());
    directions.destination(destination).setCallback(new PendingResult.Callback<DirectionsResult>() {
        @Override
        public void onResult(DirectionsResult result) {
            Log.d(TAG, "calculateDirections: routes: " + result.routes[0].toString());
            Log.d(TAG, "calculateDirections: duration: " + result.routes[0].legs[0].duration);
            Log.d(TAG, "calculateDirections: distance: " + result.routes[0].legs[0].distance);
            Log.d(TAG, "calculateDirections: geocodedWayPoints: " + result.geocodedWaypoints[0].toString());
        }

        @Override
        public void onFailure(Throwable e) {
            Log.e(TAG, "calculateDirections: Failed to get directions: " + e.getMessage() );

        }
    });
}