Flutter background service in custome time fireing function - flutter

Question

I should implement feature which should fires function in every 10 seconds in the the background and I had tried out work manager but it minimal time is 15 min but I want 10 seconds and I cant find any packages or good example for it ,

Answer 1

dependencies:
flutter_background_service: ^0.2.4
Example:
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter_background_service/flutter_background_service.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
initializeService();
runApp(MyApp());
}
Future<void> initializeService() async {
final service = FlutterBackgroundService();
await service.configure(
androidConfiguration: AndroidConfiguration(
// this will executed when app is in foreground or background in separated isolate
onStart: onStart,
// auto start service
autoStart: true,
isForegroundMode: true,
),
iosConfiguration: IosConfiguration(
// auto start service
autoStart: true,
// this will executed when app is in foreground in separated isolate
onForeground: onStart,
// you have to enable background fetch capability on xcode project
onBackground: onIosBackground,
),
);
}
// to ensure this executed
// run app from xcode, then from xcode menu, select Simulate Background Fetch
void onIosBackground() {
WidgetsFlutterBinding.ensureInitialized();
print('FLUTTER BACKGROUND FETCH');
}
void onStart() {
WidgetsFlutterBinding.ensureInitialized();
final service = FlutterBackgroundService();
service.onDataReceived.listen((event) {
if (event!["action"] == "setAsForeground") {
service.setForegroundMode(true);
return;
}
if (event["action"] == "setAsBackground") {
service.setForegroundMode(false);
}
if (event["action"] == "stopService") {
service.stopBackgroundService();
}
});
// bring to foreground
service.setForegroundMode(true);
Timer.periodic(Duration(seconds: 1), (timer) async {
if (!(await service.isServiceRunning())) timer.cancel();
service.setNotificationInfo(
title: "My App Service",
content: "Updated at ${DateTime.now()}",
);
service.sendData(
{"current_date": DateTime.now().toIso8601String()},
);
});
}
class MyApp extends StatefulWidget {
#override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String text = "Stop Service";
#override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Service App'),
),
body: Column(
children: [
StreamBuilder<Map<String, dynamic>?>(
stream: FlutterBackgroundService().onDataReceived,
builder: (context, snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(),
);
}
final data = snapshot.data!;
DateTime? date = DateTime.tryParse(data["current_date"]);
return Text(date.toString());
},
),
ElevatedButton(
child: Text("Foreground Mode"),
onPressed: () {
FlutterBackgroundService()
.sendData({"action": "setAsForeground"});
},
),
ElevatedButton(
child: Text("Background Mode"),
onPressed: () {
FlutterBackgroundService()
.sendData({"action": "setAsBackground"});
},
),
ElevatedButton(
child: Text(text),
onPressed: () async {
final service = FlutterBackgroundService();
var isRunning = await service.isServiceRunning();
if (isRunning) {
service.sendData(
{"action": "stopService"},
);
} else {
service.start();
}
if (!isRunning) {
text = 'Stop Service';
} else {
text = 'Start Service';
}
setState(() {});
},
),
],
),
floatingActionButton: FloatingActionButton(
onPressed: () {
FlutterBackgroundService().sendData({
"hello": "world",
});
},
child: Icon(Icons.play_arrow),
),
),
);
}
}

Answer 2

you can use background_fetch, it a good lib for this propose.