how to call flutter function that is inside stateful widget in outside function?-CodePudding

I want to call the _setSilentMode() function inside fireAlarm(). _setSilentMode() is inside statefull widget but fireAlarm() is outside stateful widget. whenever i put _setSilentMode() function inside fireAlarm() it gives error.

class _MyAppState extends State<MyApp> {
 
  Future<void> _setSilentMode() async {
    RingerModeStatus status;

    try {
      status = await SoundMode.setSoundMode(RingerModeStatus.silent);

      setState(() {
        _soundMode = status;
      });
    } on PlatformException {
      print('Do Not Disturb access permissions required!');
    }
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Welcome to Flutter',
      home: Scaffold(
          appBar: AppBar(
            title: const Text('Welcome to Flutter'),
          ),
          body: SingleChildScrollView(
              child: Column(
            children: [
              Switch(
                onChanged: (value) {
                  setState(() {
                    isOn = value;
                  });

                  AndroidAlarmManager.oneShot(
                    Duration(seconds: 15),
                    alarmId,
                    fireAlarm,
                  );
                  print('Alarm set  at ${DateTime.now()}');
                },
                value: isOn,
                activeColor: Colors.blue,
                activeTrackColor: Colors.yellow,
                inactiveThumbColor: Colors.redAccent,
                inactiveTrackColor: Colors.orange,
              )
            ],
          ))),
    );
  }
}

 void fireAlarm() {
    print('Alarm Fired at ${DateTime.now()}');
      // i want to call _setSilentMode() here but it gives me error 
     _setSilentMode();
 }

please help me that how to solve this problem and add _setSilentMode() inside fireAlarm() to work.

CodePudding user response：

You can use GlobalKey to access the State and call method of state to update UI. You need to make state and method public.
Alternatively, I recommend using state management libraries such as RiverPod or Provider.

CodePudding user response：

The method is outside the State class. For such you simply add widget before calling it

widget.fireAlarm