offline_navigation library

Drop-in offline turn-by-turn navigation for Flutter, powered by the Organic Maps engine and OpenStreetMap data.

Push an OfflineNavigationPage onto your navigator with a start and destination; it downloads the required country map if missing, builds the route, shows a preview, then guides turn-by-turn — all fully offline after the one-time map download — and pops with a NavigationResult:

final result = await Navigator.push<NavigationResult>(
  context,
  MaterialPageRoute(
    builder: (_) => OfflineNavigationPage(
      start: const NavPoint(latitude: -6.1722, longitude: 35.7395, name: 'Dodoma'),
      destination: const NavPoint(latitude: -6.1841, longitude: 35.9297, name: 'UDOM'),
      travelMode: TravelMode.drive,
      options: const NavOptions(voiceGuidance: true),
    ),
  ),
);

See OfflineNavigationPage for the full page, OfflineMapView for the bare map widget, and OfflineNavigation to warm the engine up ahead of time.