How to run StatusAlert.show() in background

I want to display a alert notification using StatusAlert.show(.........) in Flutter.The problem is I can run it foreground(it can be shown only over the current build context) but I want to run the StatusAlert's notification in background.The Alert is actually called when a countdown timer reaches zero.Can anyone suggest me how.

import 'package:android_alarm_manager/android_alarm_manager.dart'; import 'package:flutter/material.dart'; import 'package:flutter_datetime_picker/flutter_datetime_picker.dart'; import 'package:flutter_local_notifications/flutter_local_notifications.dart'; import 'package:intl/intl.dart'; import 'package:flushbar/flushbar.dart'; import 'package:status_alert/status_alert.dart'; import 'CommonPicker.dart'; import 'fileUtils.dart'; import 'package:firebase_messaging/firebase_messaging.dart';

Future myBackgroundMessageHandler(Map<String, dynamic> message) { if (message.containsKey('data')) { // Handle data message final dynamic data = message['data']; }

if (message.containsKey('notification')) { // Handle notification message final dynamic notification = message['notification']; }

// Or do other work. }

void status_bar() {

StatusAlert.show( context, blurPower: 0.1, duration: Duration(seconds: 5), title: 'Hey', subtitle: 'Message:XXXXXXXXXXXXXXXXXXXXXXXXXX ', configuration: IconConfiguration(icon: Icons.warning), ); } // //FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin = FlutterLocalNotificationsPlugin(); // //initializeNotification()async { // var initializeAndroid = AndroidInitializationSettings( // 'ic_launcher'); // var initializeIOS = IOSInitializationSettings(); // var initSettings = InitializationSettings(initializeAndroid, initializeIOS); // await flutterLocalNotificationsPlugin.initialize(initSettings); //} // //Future singleNotification(DateTime dateTime,String message,String subtext,int hashcode,{String sound}) async { // var androidChannel = AndroidNotificationDetails( // 'channel-id', 'channel-name', 'channel-description', // importance: Importance.Max, priority: Priority.Max,enableVibration: true,visibility:NotificationVisibility.Public ); // var iosChannel = IOSNotificationDetails(); // var platformChannelSpecifics = NotificationDetails(androidChannel, iosChannel); // await flutterLocalNotificationsPlugin.show(0, message, subtext, platformChannelSpecifics,); //}

Future callback() async { print("I am in the isolate");

// DateTime now=DateTime.now().toLocal();

status_bar();

// await singleNotification(now, "notification" , "This is the message", 98123871); print("last line of Isolate"); }

class AlertTime2 extends StatefulWidget { static const routeName = '/alertTime2';

@override _AlertTime2State createState() => _AlertTime2State(); }

class _AlertTime2State extends State { String mm = "00"; String ss = "00"; var mmValue; var ssValue; var totalTimeInSec; Flushbar flush; String _selectedTime;

final FirebaseMessaging _messaging = FirebaseMessaging();

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

//initializeNotification();

_messaging.getToken().then((token) {
  print("token is :" + token);
});

FileUtils().readFromFile().then((String value) {
  setState(() {
    _selectedTime = value;
  });
});

}

// ignore: non_constant_identifier_names void display_flush_bar() { Future.delayed(Duration(seconds: totalTimeInSec), () { setState(() { flush = Flushbar( title: "Hey", message: "XXXXXXXXXXXXXXXXXXXXxx", duration: Duration(seconds: 5), isDismissible: true, icon: Icon( Icons.warning, color: Colors.red, ), dismissDirection: FlushbarDismissDirection.HORIZONTAL, mainButton: FlatButton( onPressed: () { flush.dismiss(true); }, child: Text( "CANCEL", style: TextStyle(color: Colors.amber), ), ), )..show(context); }); }); }

void alarm_managing_function(int t) async { await AndroidAlarmManager.initialize(); await AndroidAlarmManager.periodic(Duration(seconds: t), 0, callback); }

@override Widget build(BuildContext context) { return Scaffold( body: Column( children: [ Padding( padding: const EdgeInsets.fromLTRB(30, 70, 0, 0), child: Text( "Timer for Notification", style: TextStyle( fontSize: 50, ), ), ), Padding( padding: const EdgeInsets.fromLTRB(0, 150, 0, 0), child: Text( "MM-SS", style: TextStyle( fontSize: 30, fontWeight: FontWeight.bold, ), ), ), Padding( padding: const EdgeInsets.fromLTRB(0, 0, 0, 0), child: Text( "${_selectedTime ?? 'Selected Time'}", style: TextStyle(fontWeight: FontWeight.bold, fontSize: 38), ), ), RaisedButton( onPressed: () { DatePicker.showPicker(context, showTitleActions: true, pickerModel: CustomPicker(currentTime: DateTime.tryParse(_selectedTime)), onConfirm: (time) { setState(() { print(time); _selectedTime = DateFormat("mm-ss").format(time); FileUtils().saveToFile(_selectedTime);

            mm = _selectedTime.substring(0, 2);
            ss = _selectedTime.substring(3, 5);
            print(mm);
            print(ss);
            mmValue = int.parse(mm);
            ssValue = int.parse(ss);
            totalTimeInSec = mmValue * 60 + ssValue;
            print(totalTimeInSec);

            display_flush_bar();
            alarm_managing_function(totalTimeInSec);
          });
        }, locale: LocaleType.en);
      },
      child: Text("Show Time picker"),
    ),
  ],
));

} }

yako-dev / flutter-status-alert

How to run StatusAlert.show() in background #3