private void resumeRoute(final boolean force) {
        if (null == individualRoute || force) {
            individualRoute = new IndividualRoute(this::setTarget);
            reloadIndividualRoute();
        } else {
            individualRoute.updateRoute(routeLayer);
        }
    }
Get the current map state from the map view if it exists or from the mapStateIntent field otherwise.

@return the current map state as an array of int, or null if no map state is available
main/src/main/java/cgeo/geocaching/maps/mapsforge/v6/NewMap.java