geofence_foreground_service 1.1.2

A Flutter project that creates a foreground service to handle geofencing.

example/lib/main.dart

import 'dart:async';
import 'dart:developer';

import 'package:flutter/material.dart';

import 'package:geofence_foreground_service/constants/geofence_event_type.dart';
import 'package:geofence_foreground_service/exports.dart';
import 'package:geofence_foreground_service/geofence_foreground_service.dart';
import 'package:geofence_foreground_service/models/notification_icon_data.dart';
import 'package:geofence_foreground_service/models/zone.dart';
import 'package:permission_handler/permission_handler.dart';

@pragma('vm:entry-point')
void callbackDispatcher() async {
  GeofenceForegroundService().handleTrigger(
    backgroundTriggerHandler: (zoneID, triggerType) {
      log(zoneID, name: 'zoneID');

      if (triggerType == GeofenceEventType.enter) {
        log('enter', name: 'triggerType');
      } else if (triggerType == GeofenceEventType.exit) {
        log('exit', name: 'triggerType');
      } else if (triggerType == GeofenceEventType.dwell) {
        log('dwell', name: 'triggerType');
      } else {
        log('unknown', name: 'triggerType');
      }

      return Future.value(true);
    },
  );
}

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  static final LatLng _londonCityCenter = LatLng.degree(51.509865, -0.118092);

  static final List<LatLng> _timesSquarePolygon = [
    LatLng.degree(40.758078, -73.985640),
    LatLng.degree(40.757983, -73.985417),
    LatLng.degree(40.757881, -73.985493),
    LatLng.degree(40.757956, -73.985688),
  ];

  bool _hasServiceStarted = false;

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    await Permission.location.request();
    await Permission.locationAlways.request();
    await Permission.notification.request();

    _hasServiceStarted =
        await GeofenceForegroundService().startGeofencingService(
      contentTitle: 'Test app is running in the background',
      contentText:
          'Test app will be running to ensure seamless integration with ops team',
      notificationChannelId: 'com.app.geofencing_notifications_channel',
      serviceId: 525600,
      isInDebugMode: true,
      notificationIconData: const NotificationIconData(
        resType: ResourceType.mipmap,
        resPrefix: ResourcePrefix.ic,
        name: 'launcher',
      ),
      callbackDispatcher: callbackDispatcher,
    );

    log(_hasServiceStarted.toString(), name: 'hasServiceStarted');
  }

  Future<void> _createLondonGeofence() async {
    if (!_hasServiceStarted) {
      log('Service has not started yet', name: 'createGeofence');
      return;
    }

    await GeofenceForegroundService().addGeofenceZone(
      zone: Zone(
        id: 'zone#1_id',
        radius: 1000, // measured in meters
        coordinates: [_londonCityCenter],
        notificationResponsivenessMs: 15 * 1000, // 15 seconds
      ),
    );
  }

  Future<void> _createTimesSquarePolygonGeofence() async {
    if (!_hasServiceStarted) {
      log('Service has not started yet', name: 'createGeofence');
      return;
    }

    await GeofenceForegroundService().addGeofenceZone(
      zone: Zone(
        id: 'zone#2_id',
        radius: 10000, // measured in meters
        coordinates: _timesSquarePolygon,
      ),
    );
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              ElevatedButton(
                  onPressed: _createLondonGeofence,
                  child: const Text('Create Circular London Geofence')),
              const SizedBox(height: 30),
              ElevatedButton(
                  onPressed: _createTimesSquarePolygonGeofence,
                  child: const Text('Create Polygon Times Square Geofence')),
            ],
          ),
        ),
      ),
    );
  }
}