workmanager 0.0.4

Flutter Android Workmanager. This plugin allows you to schedule background work on Android with the Android WorkManager API. You will be given the chance to run some headless Dart code, handy for back [...]

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:workmanager/workmanager.dart';

void main() => runApp(MyApp());

const simpleTaskKey = "simpleTask";
const simpleDelayedTask = "simpleDelayedTask";
const simplePeriodicTask = "simplePeriodicTask";
const simplePeriodic1HourTask = "simplePeriodic1HourTask";

void callbackDispatcher() {
  Workmanager.defaultCallbackDispatcher((echoValue) {
    print("Native echoed: $echoValue");

    switch (echoValue) {
      case simpleTaskKey:
        print("$simpleTaskKey was executed");
        break;
      case simpleDelayedTask:
        print("$simpleDelayedTask was executed");
        break;
      case simplePeriodicTask:
        print("$simplePeriodicTask was executed");
        break;
      case simplePeriodic1HourTask:
        print("$simplePeriodic1HourTask was executed");
        break;
    }

    return Future.value(true);
  });
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Flutter WorkManager Example"),
        ),
        body: Padding(
          padding: const EdgeInsets.all(8.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: <Widget>[
              Text("Initialize the plugin first",
                  style: Theme.of(context).textTheme.headline),
              RaisedButton(
                  child: Text("Start the Flutter background service first"),
                  onPressed: () {
                    Workmanager.initialize(
                      callbackDispatcher,
                      isInDebugMode: true,
                    );
                  }),

              Text("One Off Tasks",
                  style: Theme.of(context).textTheme.headline),
              //This job runs once.
              //Most likely this will trigger immediately
              RaisedButton(
                  child: Text("Register OneOff Task"),
                  onPressed: () {
                    Workmanager.registerOneOffTask(
                      "1",
                      simpleTaskKey,
                    );
                  }),
              //This job runs once
              //This wait at least 10 seconds before running
              RaisedButton(
                  child: Text("Register Delayed OneOff Task"),
                  onPressed: () {
                    Workmanager.registerOneOffTask(
                      "2",
                      simpleDelayedTask,
                      initialDelay: Duration(seconds: 10),
                    );
                  }),

              Text("Periodic Tasks",
                  style: Theme.of(context).textTheme.headline),
              //This job runs periodically
              //It will wait at least 10 seconds before its first launch
              //Since we have not provided a frequency it will be the default 15 minutes
              RaisedButton(
                  child: Text("Register Periodic Task"),
                  onPressed: () {
                    Workmanager.registerPeriodicTask(
                      "3",
                      simplePeriodicTask,
                      initialDelay: Duration(seconds: 10),
                    );
                  }),
              //This job runs periodically
              //It will run about every hour
              RaisedButton(
                  child: Text("Register 1 hour Periodic Task"),
                  onPressed: () {
                    Workmanager.registerPeriodicTask(
                      "5",
                      simplePeriodic1HourTask,
                      frequency: Duration(hours: 1),
                    );
                  }),
            ],
          ),
        ),
      ),
    );
  }
}