Run task every minute in Flutter

Question

I'm very beginner in mobile development. I want to create an android app with flutter which send a GET request to my server every minutes even if the app is in background or screen is off. I did it with the Cron plugin but when the app is no more in foreground, the data are not sent to my server. Can you please help me to know which plugin need I to use ? I tried with android_workmanager_plus but periodically wasn't seem to work :/

this is how it's implemented for the moment

TextButton(
                onPressed: () {
                  var cron =  Cron();
                  cron.schedule(Schedule.parse('*/1 * * * *'), () async {
                  BlocProvider.of<TestCubit>(context).validate();
                  });
                },

and this is my method in my cubit file

validate() async{

    var battery = Battery();
    var batlevel = await battery.batteryLevel;
    state.status = Colors.blue;
    emit(state);
    try{
      final batt = await repo.getBattery(batlevel.toString());
      print(batt);
      //print(state.path);

    }catch(e){
      print(e);
    }
    state.status = Colors.green;
    emit(state);
  }
}

Thanks for your future help :)

Answer 1

You don't need any plugins to repeat something every second, however I doubt this works when the app is not open, it works when the app is open and backgrounded

t = Timer.periodic(Duration(seconds: 1), (Timer timer) => yourFunction());

Answer 2

You can use dart:async in your code with Timer.periodic

ex: for run task every 60 seconds

timer = Timer.periodic(
      const Duration(
        seconds: 60, //You can change second to milisecond etc
      ),
      (t) => getData(),
    );

you can add it in function or in initstate, Docs

Nb: don't forget to add import 'dart:async'; and late Timer timer;