为什么在给定时间后安排通知不起作用

Question

当我安排通知并立即播放时，它工作正常，但是当我尝试播放用户选择的通知时，它不起作用。

下面的代码从另一个屏幕获取时间并将其取回。

void _awaitReturnValueFromSecondScreen(BuildContext context) async {

final result = await Navigator.push(
    context,
    MaterialPageRoute(
      builder: (context) => SecondScreen(onChanged: (int value) {  },),
    ));

setState(() {
  mymodel.time = result;
  mymodel.timePickedtime = tz.TZDateTime.local(DateTime.now().year,DateTime.now().month,DateTime.now().day, mymodel.time.hour, mymodel.time.minute);
});
}

下面的代码是我用来显示通知的主要代码。 当我在循环内打印时间时，它会打印所选时间，但不会在所选时间播放。

Future<void> DisplayNotifications() async{
mymodel.getData();


for(var x = 0; x < mymodel.album[mymodel.num].sound.length; x++) {

  this.preferences = await SharedPreferences.getInstance();
  setState(() {
    soundON = this.preferences?.getBool('toggleSoung${mymodel.album[mymodel.num].sound[x].id}${mymodel.np}');
   
  });

  if (soundON ?? mymodel.album[mymodel.num].sound[x].isOn == true) {
    

    for (var count = 0; count <= 3; count++){


      var initializationSettingsAndroid =
      AndroidInitializationSettings('@mipmap/ic_launcher');
      var initializationSettings = InitializationSettings(
          android: initializationSettingsAndroid);
      flutterLocalNotificationsPlugin.initialize(initializationSettings);
      AndroidNotificationDetails content =
      AndroidNotificationDetails(
          'channel id ${count+x}',
          'channel name ${count+x}',
          'channel description ${count+x}',
          sound: RawResourceAndroidNotificationSound(mymodel.album[mymodel.num].sound[x].sURL),
          playSound: true,
          // importance: Importance.high,
          enableVibration: false ,
          visibility: NotificationVisibility.secret,
          autoCancel: true,
          timeoutAfter:7000
      );
      NotificationDetails firstNotificationPlatformSpecifics =
      NotificationDetails(android: content);

      await flutterLocalNotificationsPlugin.zonedSchedule
        (count, null, null, mymodel.timePickedtime.add(Duration(seconds: 20)), firstNotificationPlatformSpecifics,
          uiLocalNotificationDateInterpretation: UILocalNotificationDateInterpretation.absoluteTime,
          androidAllowWhileIdle: true);
    }
  }
}

}