@Nullable
    private static App getAppFromMenuItem(final MenuItem item) {
        final int id = item.getItemId();
        for (final NavigationAppsEnum navApp : NavigationAppsEnum.values()) {
            if (navApp.id == id) {
                return navApp.app;
            }
        }
        return null;
    }
Handles menu selections for menu entries created with
{@link #showNavigationMenu(Activity, Geocache, Waypoint, Geopoint)}.
main/src/main/java/cgeo/geocaching/apps/navi/NavigationAppFactory.java