Fetch Route and Launch Navigation

1
import 'package:flutter/foundation.dart';
2
import 'package:flutter/material.dart';
3
import 'package:nb_navigation_flutter/nb_navigation_flutter.dart';
4

5
class LaunchNavigation extends StatefulWidget {
6
  static const String title = "Route Request and Launch Navigation";
7

8
  const LaunchNavigation({super.key});
9

10
  @override
11
  LaunchNavigationState createState() => LaunchNavigationState();
12
}
13

14
class LaunchNavigationState extends State<LaunchNavigation> {
15
  List<DirectionsRoute> routes = [];
16

17
  @override
18
  void initState() {
19
    super.initState();
20
  }
21

22
  @override
23
  Widget build(BuildContext context) {
24
    return Scaffold(
25
      appBar: AppBar(
26
        title: const Text(LaunchNavigation.title),
27
      ),
28
      body: Padding(
29
        padding: const EdgeInsets.all(8.0),
30
        child: Column(
31
          children: [
32
            Row(
33
              children: [
34
                const Padding(padding: EdgeInsets.only(left: 8)),
35
                ElevatedButton(
36
                  style: ButtonStyle(
37
                    backgroundColor: WidgetStateProperty.all(Colors.blueAccent),
38
                  ),
39
                  onPressed: () {
40
                    _fetchRoute();
41
                  },
42
                  child: const Text("Fetch Route"),
43
                ),
44
                const Padding(padding: EdgeInsets.only(left: 8)),
45
                ElevatedButton(
46
                  style: ButtonStyle(
47
                      backgroundColor: WidgetStateProperty.all(
48
                          routes.isEmpty ? Colors.grey : Colors.blueAccent),
49
                      enableFeedback: routes.isNotEmpty),
50
                  onPressed: () {
51
                    _startNavigation();
52
                  },
53
                  child: const Text("Start Navigation"),
54
                ),
55
              ],
56
            ),
57
            Padding(
58
              padding: const EdgeInsets.all(8),
59
              child: Text(
60
                  "route info: ${routes.isEmpty ? "" : routes.first.geometry ?? ""}"),
61
            )
62
          ],
63
        ),
64
      ),
65
    );
66
  }
67

68
  void _fetchRoute() async {
69
    LatLng origin = const LatLng(1.312533169133601, 103.75986708439264);
70
    LatLng dest = const LatLng(1.310473772283314, 103.77982271935586);
71

72
    RouteRequestParams requestParams = RouteRequestParams(
73
      origin: origin,
74
      destination: dest,
75
      // waypoints: [Coordinate(latitude: wayP2.latitude, longitude: wayP2.longitude)],
76
      // overview: ValidOverview.simplified,
77
      // avoid: [SupportedAvoid.toll, SupportedAvoid.ferry],
78
      // option: SupportedOption.flexible,
79
      // truckSize: [200, 200, 600],
80
      // truckWeight: 100,
81
      // unit: SupportedUnits.imperial,
82
      mode: ValidModes.car,
83
    );
84

85
    DirectionsRouteResponse routeResponse =
86
        await NBNavigation.fetchRoute(requestParams);
87
    if (routeResponse.directionsRoutes.isNotEmpty) {
88
      setState(() {
89
        routes = routeResponse.directionsRoutes;
90
      });
91
    } else if (routeResponse.message != null) {
92
      if (kDebugMode) {
93
        print(
94
            "====error====${routeResponse.message}===${routeResponse.errorCode}");
95
      }
96
    }
97
  }
98

99
  void _startNavigation() {
100
    if (routes.isEmpty) return;
101
    NavigationLauncherConfig config =
102
        NavigationLauncherConfig(route: routes.first, routes: routes);
103
    config.locationLayerRenderMode = LocationLayerRenderMode.gps;
104
    config.shouldSimulateRoute = true;
105
    config.themeMode = NavigationThemeMode.system;
106
    config.useCustomNavigationStyle = false;
107
    NBNavigation.startNavigation(config);
108
  }
109

110
  @override
111
  void dispose() {
112
    // TODO: implement dispose
113
    super.dispose();
114
  }
115

116
  @override
117
  void didUpdateWidget(LaunchNavigation oldWidget) {
118
    // TODO: implement didUpdateWidget
119
    super.didUpdateWidget(oldWidget);
120
  }
121

122
  @override
123
  void didChangeDependencies() {
124
    // TODO: implement didChangeDependencies
125
    super.didChangeDependencies();
126
  }
127
}
128

129