@NonNull
    static List<NavigationAppsEnum> getActiveNavigationApps() {
        final List<NavigationAppsEnum> activeApps = new ArrayList<>();
        for (final NavigationAppsEnum appEnum : getInstalledNavigationApps()) {
            if (Settings.isUseNavigationApp(appEnum)) {
                activeApps.add(appEnum);
            }
        }
        return activeApps;
    }
@return all navigation apps, which are installed and activated in the settings
main/src/main/java/cgeo/geocaching/apps/navi/NavigationAppFactory.java