workmanager 0.0.6+2

Flutter Android Workmanager. This plugin allows you to schedule background work on Android with the Android WorkManager API.

example/lib/main.dart

import 'dart:io';

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

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) async {
    print("Native echoed: $echoValue");

    switch (echoValue) {
      case simpleTaskKey:
        print("$simpleTaskKey was executed");
        Directory tempDir = await getTemporaryDirectory();
        String tempPath = tempDir.path;
        print("i have a temp dir: $tempDir");
        break;
      case simpleDelayedTask:
        print("$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),
                    );
                  }),
            ],
          ),
        ),
      ),
    );
  }
}