flutter_async_utils 0.0.1

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flutter_async_utils #

A few utils to make working with Streams and Futures easier.

StreamSubscriberMixin #

Right now not much more than an extracted version of the StreamSubscriberMixin of https://github.com/flutter/plugins/blob/570932f/packages/firebase_database/lib/ui/utils/stream_subscriber_mixin.dart

FutureTaskStateMixin #

Useful for providing asynchronous callbacks to show progress and prevent double-taps.

Work In Progress #

Under heavy development. You might take a look at AuthPass which makes heavy use of those simple classes. For example _SelectFileWidgetState.

[0.0.1] #

  • Initial release.


import 'dart:async';

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

void main() {

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

Future<void> _wait(int seconds) async {
  await Future<void>.delayed(Duration(seconds: seconds));

class _MyAppState extends State<MyApp> with FutureTaskStateMixin {
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        body: Container(
          width: double.infinity,
          child: Column(
            mainAxisSize: MainAxisSize.min,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: <Widget>[
              const SizedBox(height: 160),
              const Text('Example App ;-)\n'),
                child: const Text('Tap me.'),
                onPressed: asyncTaskCallback((progress) async {
                  await _wait(1);
                  progress.progressLabel = 'Doing more work';
                  await _wait(2);
                  progress.progressLabel = 'And even more.';
                  await _wait(3);
              ...?task == null
                  ? null
                  : [
                      const CircularProgressIndicator(),
                      Text(task.progressLabel ?? ''),

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  flutter_async_utils: ^0.0.1

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:flutter_async_utils/flutter_async_utils.dart';
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Learn more about scoring.

We analyzed this package on Jul 2, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.13
  • Flutter: 1.17.5

Analysis suggestions

Package not compatible with SDK dart

because of import path [flutter_async_utils] that is in a package requiring null.

Maintenance suggestions

Package is pre-v0.1 release. (-10 points)

While nothing is inherently wrong with versions of 0.0.*, it might mean that the author is still experimenting with the general direction of the API.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.7.0 <3.0.0
flutter 0.0.0
logging >=0.11.0 <2.0.0 0.11.4
Transitive dependencies
collection 1.14.12 1.14.13
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6 1.2.0
vector_math 2.0.8
Dev dependencies
pedantic ^1.9.0