flt_worker 0.1.0

The flt_worker plugin allows you to schedule and execute Dart background tasks, based on the WorkManager and the BackgroundTasks APIs, for Android and iOS 13+ respectively.

example/lib/main.dart

import 'dart:io';

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

import 'background_tasks_btc_prices.dart';
import 'background_tasks_counter.dart';
import 'btc_prices.dart';
import 'counter.dart';
import 'work_manager_btc_prices.dart';
import 'work_manager_counter.dart';
import 'worker.dart';

/// Background processing examples.
///
/// Force start iOS background tasks:
/// ```
/// e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateLaunchForTaskWithIdentifier:@"com.example.btc_prices_task"]
/// e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateLaunchForTaskWithIdentifier:@"com.example.counter_task"]
/// e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateLaunchForTaskWithIdentifier:@"com.example.task1"]
/// e -l objc -- (void)[[BGTaskScheduler sharedScheduler] _simulateLaunchForTaskWithIdentifier:@"dev.example.task2"]
/// ```
///
/// > See [iOS documentations](https://developer.apple.com/documentation/backgroundtasks/starting_and_terminating_tasks_during_development)
void main() {
  runApp(MyApp());
  initializeWorker(worker);
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) => MaterialApp(
        home: Scaffold(
          appBar: AppBar(
            title: const Text('Worker Examples'),
          ),
          body: Builder(
            builder: (context) => SingleChildScrollView(
              child: Container(
                padding:
                    const EdgeInsets.symmetric(vertical: 48, horizontal: 32),
                child: DefaultTextStyle(
                  textAlign: TextAlign.center,
                  style: const TextStyle(),
                  child: Column(
                    mainAxisSize: MainAxisSize.min,
                    crossAxisAlignment: CrossAxisAlignment.stretch,
                    children: <Widget>[
                      const Text(
                        'High level API examples',
                        style: TextStyle(
                          fontSize: 14,
                          color: Colors.black45,
                        ),
                      ),
                      const SizedBox(height: 16),
                      RaisedButton(
                        child: const Text('Counter'),
                        onPressed: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => Counter(),
                            )),
                      ),
                      RaisedButton(
                        child: const Text('Bitcoin price polling'),
                        onPressed: () => Navigator.push(
                            context,
                            MaterialPageRoute(
                              builder: (_) => BtcPrices(),
                            )),
                      ),
                      Padding(
                        padding: const EdgeInsets.only(top: 48, bottom: 16),
                        child: const Text(
                          'Low level platform-specific API examples',
                          style: TextStyle(
                            fontSize: 14,
                            color: Colors.black45,
                          ),
                        ),
                      ),
                      ...(Platform.isAndroid
                          ? _workManagerExamples(context)
                          : _bgTasksExamples(context)),
                    ],
                  ),
                ),
              ),
            ),
          ),
        ),
      );
}

List<Widget> _workManagerExamples(BuildContext context) => [
      RaisedButton(
        child: const Text('Counter\n(OneTimeWorkRequest)'),
        onPressed: () => Navigator.push(
            context,
            MaterialPageRoute(
              builder: (_) => WorkManagerCounter(),
            )),
      ),
      RaisedButton(
        child: const Text('Bitcoin price polling\n(PeriodicWorkRequest)'),
        onPressed: () => Navigator.push(
            context,
            MaterialPageRoute(
              builder: (_) => WorkManagerBtcPrices(),
            )),
      ),
    ];

List<Widget> _bgTasksExamples(BuildContext context) => [
      RaisedButton(
        child: const Text('Counter\n(BGProcessingTaskRequest)'),
        onPressed: () {
          Navigator.push(
              context,
              MaterialPageRoute(
                builder: (_) => BackgroundTasksCounter(),
              ));
        },
      ),
      RaisedButton(
        child: const Text('Bitcoin price polling\n(BGAppRefreshTaskRequest)'),
        onPressed: () {
          Navigator.push(
              context,
              MaterialPageRoute(
                builder: (_) => BackgroundTasksBtcPrices(),
              ));
        },
      ),
    ];