Radar.onEvents() never called

[MapleNoise]

I have a problem with Radar.onEvents(), is never called :

Radar.initialize("prj_test_pk_*");
Radar.setUserId(mUserId);
Radar.startTracking('responsive');
Radar.onEvents((result) {
    print("RADAR GEOFENCE DETECTED EVENTS");
    print(result);
});

On my IDE logs I've :

But my print on the onEvents listener not show.

What have I done wrong ?

Thanks.

[brettguenther]

@MapleNoise - this should be fixed https://github.com/radarlabs/flutter-radar/releases/tag/3.1.5. let us know if you experience any other issues.

[Jonny1987]

I am having the same problem. I have the following code as the docs state, but the print line inside onEvents never gets executed (but Radar's log line shows the event has been received):

Future<void> startTracking() async {
  Radar.setUserId(authRepository.currentUserId);
  Radar.onEvents(onEvents);
  await Radar.startTracking('continuous');
}

@pragma('vm:entry-point')
static onEvents(Map result) {
  print('event received');
}

[KennyHuRadar]

I noticed that in the provided code snippet, you did not call Radar.attachListeners(); can you try adding that line as such

Radar.setUserId(authRepository.currentUserId);
Radar.attachListeners();
Radar.onEvents(onEvents);
await Radar.startTracking('continuous');

[Jonny1987]

Thanks, but this is not working either. Just to explain how I call my startTracking function in case it makes a difference....it is inside a class which has a riverpod provider, and then in the initState of a widget I am calling ref.read(radarServiceProvider).startTracking();

Btw, attachListeners is not mentioned on the flutter docs page so you may want to add that (https://radar.com/documentation/sdk/flutter)

[KennyHuRadar]

That is interesting, can you possibly share more code snippets of the way you are managing your state to aid us in reproducing the issue you are encountering?

[Jonny1987]

Sure...I have the following class:

import 'package:flutter_radar/flutter_radar.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';
import 'package:workwith/src/features/auth/data/auth_repository.dart';

class RadarService {
  final AuthRepository authRepository;
  RadarService({required this.authRepository});

  Future<void> startTracking() async {
    Radar.setUserId(authRepository.currentUserId);
    Radar.attachListeners();
    Radar.onEvents(onEvents);
    await Radar.startTracking('continuous');
  }

  @pragma('vm:entry-point')
  static onEvents(Map result) {
    print('event received');
  }
}

final radarServiceProvider = Provider<RadarService>((ref) {
  final authRepository = ref.watch(authRepositoryProvider);
  return RadarService(authRepository: authRepository);
});

Then in one of my widgets I have this:

  @override
  void initState() {
    super.initState();
    ref.read(radarServiceProvider).startTracking();
  }

I see events coming in from Radars own log lines, but my log line isn't being printed

[DigiDevZ]

Seeing this issue currently in a example project I've spun up to test out Radar. flutter_radar version is 3.9.1

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

  @override
  State<RadarWidget> createState() => _RadarWidgetState();
}

class _RadarWidgetState extends State<RadarWidget> {
  @override
  Widget build(BuildContext context) {
    print('Radar widget building');
    return const map.Map();
  }

  @override
  void initState() {
    super.initState();
    print('Radar init state');
    initRadar();
  }

  @pragma('vm:entry-point')
  static void onLocation(Map res) {
    print('📍📍 onLocation: $res');
  }

  @pragma('vm:entry-point')
  static void onClientLocation(Map res) {
    print('📍📍 onClientLocation: $res');
  }

  @pragma('vm:entry-point')
  static void onError(Map res) {
    print('📍📍 onError: $res');
  }

  @pragma('vm:entry-point')
  static void onLog(Map res) {
    print('📍📍 onLog: $res');
  }

  @pragma('vm:entry-point')
  static void onEvents(Map res) {
    print('📍📍 onEvents: $res');
  }

  @pragma('vm:entry-point')
  static void onToken(Map res) {
    print('📍📍 onToken: $res');
  }

  Future<void> initRadar() async {
    Radar.initialize("..."); //Radar api key
    Radar.setLogLevel('info');

    Radar.attachListeners();

    Radar.onLocation(onLocation);
    Radar.onClientLocation(onClientLocation);
    Radar.onError(onError);
    Radar.onEvents(onEvents);
    Radar.onLog(onLog);
    Radar.onToken(onToken);

    final status = await Radar.getPermissionsStatus();
    final requestedStatus = await Radar.requestPermissions(true);

    await Radar.startTracking('continuous');
    final happening = await Radar.mockTracking(
        //(37.53206895196914,-77.42409998968543)
        origin: {
          'latitude': 37.53206895196914,
          'longitude': -77.42409998968543
        },
        //dest: (37.53011080455556, -77.42597953180213)
        destination: {
          'latitude': 37.53011080455556,
          'longitude': -77.42597953180213
        },
        mode: 'foot',
        steps: 10,
        interval: 5);
  }
}

When running this widget, none of my onEvent print lines are triggered even though I can see the RadarLogger events printing. This issue is definitely not fixed, and it's not clear exactly what is occurring that the callbacks are not being triggered.

Edit: It looks like the logging via Radar.attachListener() is really flaky, I've made some changes to the code above and when running the app (debug env) it's now a 50/50 chance as to wether the logs start printing.

[Jonny1987]

So I realized I actually hadn't followed the setup instructions fully (I copied the code but didn't change it to my API key), so double check that you have done this correctly: https://radar.com/documentation/sdk/flutter

[DigiDevZ]

Just wanted to drop an update, I was able to get this working consistently in my projects now.

In case of future observers to this issue

• Ensure that for both the android and ios portions of the project you have the Radar.initialize code setup in the correct locations
  • My issue was related to Android project not referencing the Application.kt class in the AndroidManifest
• You need to have location permissions granted before you will start getting logs, RadarLogger will work without location permissions, but your custom listeners will not unless you have location permissions.

[KennyHuRadar]

Thank you for raising this, we will seek to improve the reliability of our SDK in one of our our upcoming releases.