Masamune Location Google

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Masamune Location Google

Overview

masamune_location_google provides Google Maps integration for Masamune apps. Display maps, add markers, and use Google-specific location features.

Note: Requires masamune_location for core location functionality.

Usage

Installation

flutter pub add masamune_location
flutter pub add masamune_location_google

Register the Adapter

Configure GoogleMobileLocationMasamuneAdapter for Google Maps functionality.

// lib/adapter.dart

import 'package:masamune_location_google/masamune_location_google.dart';

/// Masamune adapters used in the application.
final masamuneAdapters = <MasamuneAdapter>[
  const UniversalMasamuneAdapter(),

  GoogleMobileLocationMasamuneAdapter(
    apiKey: "YOUR_GOOGLE_MAPS_API_KEY",  // Google Maps API key
    requestWhenInUsePermissionOnInit: true,
    locationAccuracy: LocationAccuracy.high,
  ),
];

Display Google Map

Use the MapView widget to display a Google Map:

class MapPage extends PageScopedWidget {
  @override
  Widget build(BuildContext context, PageRef ref) {
    final mapController = ref.page.controller(MapController.query());

    return Scaffold(
      appBar: AppBar(title: const Text("Map")),
      body: MapView(
        controller: mapController,
        initialCameraPosition: CameraPosition(
          target: LatLng(35.6812, 139.7671),  // Tokyo Station
          zoom: 15,
        ),
        onMapCreated: (controller) {
          print("Map created!");
        },
      ),
    );
  }
}

Add Markers

Add markers to the map:

// Add a marker
mapController.addMarker(
  Marker(
    markerId: MarkerId("tokyo-station"),
    position: LatLng(35.6812, 139.7671),
    title: "Tokyo Station",
    snippet: "Major railway station",
    icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueRed),
  ),
);

// Remove a marker
mapController.removeMarker(MarkerId("tokyo-station"));

// Clear all markers
mapController.clearMarkers();

Camera Control

Move the camera programmatically:

// Animate to location
await mapController.animateCamera(
  CameraPosition(
    target: LatLng(35.6812, 139.7671),
    zoom: 17,
    tilt: 45,
    bearing: 90,
  ),
);

// Move immediately
await mapController.moveCamera(
  CameraPosition(
    target: LatLng(35.6812, 139.7671),
    zoom: 15,
  ),
);

Add Shapes

Add circles, polygons, and polylines:

// Add circle
mapController.addCircle(
  Circle(
    circleId: CircleId("area"),
    center: LatLng(35.6812, 139.7671),
    radius: 500,  // meters
    fillColor: Colors.blue.withOpacity(0.3),
    strokeColor: Colors.blue,
    strokeWidth: 2,
  ),
);

// Add polygon
mapController.addPolygon(
  Polygon(
    polygonId: PolygonId("zone"),
    points: [
      LatLng(35.68, 139.76),
      LatLng(35.69, 139.77),
      LatLng(35.68, 139.78),
    ],
    fillColor: Colors.green.withOpacity(0.3),
  ),
);

// Add polyline (route)
mapController.addPolyline(
  Polyline(
    polylineId: PolylineId("route"),
    points: [
      LatLng(35.6812, 139.7671),
      LatLng(35.6897, 139.6917),
    ],
    color: Colors.red,
    width: 5,
  ),
);

Map Styling

Apply custom map styles:

mapController.setMapStyle(
  MapStyle.dark,  // or MapStyle.light, MapStyle.custom(jsonString)
);

Tips

• Obtain a Google Maps API key from Google Cloud Console
• Enable Google Maps SDK for iOS/Android in your Google Cloud project
• Configure API key restrictions to prevent unauthorized usage
• Test on real devices for accurate GPS behavior

GitHub Sponsors

Sponsors are always welcome. Thank you for your support!

https://github.com/sponsors/mathrunet