Archie Mistry

Archie Mistry

1597191840

Flutter plugin to play audio in the background while the screen is off

audio_service

This plugin wraps around your existing audio code to allow it to run in the background or with the screen turned off, and allows your app to interact with headset buttons, the Android lock screen and notification, iOS control center, wearables and Android Auto. It is suitable for:

  • Music players
  • Text-to-speech readers
  • Podcast players
  • Navigators
  • More!

How does this plugin work?

You encapsulate your audio code in a background task which runs in a special isolate that continues to run when your UI is absent. Your background task implements callbacks to respond to playback requests coming from your Flutter UI, headset buttons, the lock screen, notification, iOS control center, car displays and smart watches:

audio_service_callbacks

You can implement these callbacks to play any sort of audio that is appropriate for your app, such as music files or streams, audio assets, text to speech, synthesised audio, or combinations of these.

Feature Android iOS
background audio ✅ ✅
headset clicks ✅ ✅
Handle phonecall interruptions ✅ ✅
start/stop/play/pause/seek/rate ✅ ✅
fast forward/rewind ✅ ✅
repeat/shuffle mode ✅ ✅
queue manipulation, skip next/prev ✅ ✅
custom actions ✅ ✅
custom events ✅ ✅
notifications/control center ✅ ✅
lock screen controls ✅ ✅
album art ✅ ✅
Android Auto, Apple CarPlay (untested) ✅

If you’d like to help with any missing features, please join us on the GitHub issues page.

Migrating to 0.13.0

As of 0.13.0, all callbacks in AudioBackgroundTask are asynchronous. This allows the main isolate to await their completion and better synchronise with the background audio task.

As of 0.11.0, the background audio task terminates when onStop completes rather than when onStart completes.

As of 0.10.0, your broadcast receiver in AndroidManifest.xml should be replaced with the one below to ensure that headset and notification clicks continue to work:

    <receiver android:name="com.ryanheise.audioservice.MediaButtonReceiver" >
      <intent-filter>
        <action android:name="android.intent.action.MEDIA_BUTTON" />
      </intent-filter>
    </receiver>

Can I make use of other plugins within the background audio task?

Yes! audio_service is designed to let you implement the audio logic however you want, using whatever plugins you want. You can use your favourite audio plugins such as just_audio, flutter_radio, flutter_tts, and others, within your background audio task. There are also plugins like just_audio_service that provide default implementations of BackgroundAudioTask to make your job easier.

Note that this plugin will not work with other audio plugins that overlap in responsibility with this plugin (i.e. background audio, iOS control center, Android notifications, lock screen, headset buttons, etc.)

Example

Your audio code will run in a special background isolate, separate and detachable from your app’s UI. To achieve this, define a subclass of BackgroundAudioTask that overrides a set of callbacks to respond to client requests:

class MyBackgroundTask extends BackgroundAudioTask {
  // Initialise your audio task
  onStart(Map<String, dynamic> params) {}
  // Handle a request to stop audio and finish the task
  onStop() async {}
  // Handle a request to play audio
  onPlay() {}
  // Handle a request to pause audio
  onPause() {}
  // Handle a headset button click (play/pause, skip next/prev)
  onClick(MediaButton button) {}
  // Handle a request to skip to the next queue item
  onSkipToNext() {}
  // Handle a request to skip to the previous queue item
  onSkipToPrevious() {}
  // Handle a request to seek to a position
  onSeekTo(Duration position) {}
  // Handle a phone call or other interruption
  onAudioFocusLost(AudioInterruption interruption) {}
  // Handle the end of an audio interruption.
  onAudioFocusGained(AudioInterruption interruption) {}
}

You can implement these (and other) callbacks to play any type of audio depending on the requirements of your app. For example, if you are building a podcast player, you may have code such as the following:

import 'package:just_audio/just_audio.dart';
class PodcastBackgroundTask extends BackgroundAudioTask {
  AudioPlayer _player = AudioPlayer();
  onPlay() {
    _player.play();
    AudioServiceBackground.setState(playing: true, ...);
  }

If you are instead building a text-to-speech reader, you may have code such as the following:

import 'package:flutter_tts/flutter_tts.dart';
class ReaderBackgroundTask extends BackgroundAudioTask {
  FlutterTts _tts = FlutterTts();
  String article;
  onPlay() {
    _tts.speak(article);
    AudioServiceBackground.setState(playing: true, ...);
  }
}

There are several methods in the AudioServiceBackground class that are made available to your background audio task to allow it to communicate to clients outside the isolate, such as your Flutter UI (if present), the iOS control center, the Android notification and lock screen. These are:

  • AudioServiceBackground.setState broadcasts the current playback state to all clients. This includes whether or not audio is playing, but also whether audio is buffering, the current playback position and buffer position, the current playback speed, and the set of audio controls that should be made available. When you broadcast this information to all clients, it allows them to update their user interfaces to show the appropriate set of buttons, and show the correct audio position on seek bars, for example. It is important for you to call this method whenever any of these pieces of state changes. You will typically want to call this method from your onStart, onPlay, onPause, onSkipToNext, onSkipToPrevious and onStop callbacks.
  • AudioServiceBackground.setMediaItem broadcasts the currently playing media item to all clients. This includes the track title, artist, genre, duration, any artwork to display, and other information. When you broadcast this information to all clients, it allows them to update their user interface accordingly so that it is displayed on the lock screen, the notification, and in your Flutter UI (if present). You will typically want to call this method from your onStart, onSkipToNext and onSkipToPrevious callbacks.
  • AudioServiceBackground.setQueue broadcasts the current queue to all clients. Some clients like Android Auto may display this information in their user interfaces. You will typically want to call this method from your onStart callback. Other callbacks exist where it may be appropriate to call this method such as onAddQueueItem and onRemoveQueueItem.

Once you have built your isolated background audio task, your Flutter UI connects to it by inserting an AudioServiceWidget at the top of your widget tree:

return MaterialApp(
  home: AudioServiceWidget(MainScreen()),
);

Starting the background audio task:

await AudioService.start(
  backgroundTaskEntrypoint: _myEntrypoint,
  androidNotificationIcon: 'mipmap/ic_launcher',
  // An example of passing custom parameters.
  // These will be passed through to your `onStart` callback.
  params: {'url', 'https://somewhere.com/sometrack.mp3'},
);
// this must be a top-level function
void _myEntrypoint() => AudioServiceBackground.run(() => MyBackgroundTask());

Shutting down the background audio task:

// This will pass through to your `onStop` callback.
AudioService.stop();

While your background task is running, your Flutter UI can send requests to it via methods in the AudioService class which pass through to the corresponding methods in your background audio task:

  • AudioService.play
  • AudioService.pause
  • AudioService.click
  • AudioService.skipToNext
  • AudioService.skipToPrevious
  • AudioService.seekTo

Your Flutter UI can also react to changes to the state, current media item and queue that are broadcast by your background audio task by listening to the following streams:

  • AudioService.playbackStateStream
  • AudioService.currentMediaItemStream
  • AudioService.queueStream

Keep in mind that your Flutter UI and background task run in separate isolates and do not share memory. The only way they communicate is via message passing. Your Flutter UI will only use the AudioService API to communicate with the background task, while your background task will only use the AudioServiceBackground API to interact with the clients, which include the Flutter UI.

Android setup

These instructions assume that your project follows the new project template introduced in Flutter 1.12. If your project was created prior to 1.12 and uses the old project structure, you can update your project to follow the new project template.

Additionally:

  1. Edit your project’s AndroidManifest.xml file to declare the permission to create a wake lock, and add component entries for the <service> and <receiver>:
<manifest ...>
  <uses-permission android:name="android.permission.WAKE_LOCK"/>
  <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>

  <application ...>

    ...

    <service android:name="com.ryanheise.audioservice.AudioService">
      <intent-filter>
        <action android:name="android.media.browse.MediaBrowserService" />
      </intent-filter>
    </service>

    <receiver android:name="com.ryanheise.audioservice.MediaButtonReceiver" >
      <intent-filter>
        <action android:name="android.intent.action.MEDIA_BUTTON" />
      </intent-filter>
    </receiver> 
  </application>
</manifest>
  1. Starting from Flutter 1.12, you will need to disable the shrinkResources setting in your android/app/build.gradle file, otherwise the icon resources used in the Android notification will be removed during the build:
android {
    compileSdkVersion 28

    ...

    buildTypes {
        release {
            signingConfig ...
            shrinkResources false // ADD THIS LINE
        }
    }
}

iOS setup

Insert this in your Info.plist file:

	<key>UIBackgroundModes</key>
	<array>
		<string>audio</string>
	</array>

The example project may be consulted for context.

Where can I find more information?

Download Details:

Author: ryanheise

Source Code: https://github.com/ryanheise/audio_service

#flutter #dart #mobile-apps

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Flutter plugin to play audio in the background while the screen is off
Destiny Volkman

Destiny Volkman

1597014000

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.

sksl_warm-up

If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.

flutter_autofill

A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSlider, DatePicker with support for date range and time picker with the new style.

flutter_DatePicker

New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Aliyah Satterfield

Aliyah Satterfield

1591643580

Adobe XD plugin for Flutter with CodePen Tutorial

Recently Adobe XD releases a new version of the plugin that you can use to export designs directly into flutter widgets or screens. Yes, you read it right, now you can make and export your favorite design in Adobe XD and export all the design in the widget form or as a full-screen design, this can save you a lot of time required in designing.

What we will do?
I will make a simple design of a dialogue box with a card design with text over it as shown below. After you complete this exercise you can experiment with the UI. You can make your own components or import UI kits available with the Adobe XD.

#developers #flutter #adobe xd design export to flutter #adobe xd flutter code #adobe xd flutter code generator - plugin #adobe xd flutter plugin #adobe xd flutter plugin tutorial #adobe xd plugins #adobe xd to flutter #adobe xd tutorial #codepen for flutter.

Terry Tremblay

Terry Tremblay

1598396940

What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).

flutter-mobile-desktop-web-embedded_min

Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.

humming_bird_dart_flutter

Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are

Dream11

Dream11

NuBank

NuBank

Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Sagar Shende

Sagar Shende

1577376573

How to Create Splash Screen in a Flutter App | Splash Screen Tutorial

Splash Screen help Brand to get Noticed Or Brand Awareness so Today I am going to show how to create Splash screen in a flutter

Splash Screen Animation can be a Simple Logo Animation of your Brand. this Splashscreen animation can be done with the help of the splashscreen package.

💻Splash Screen:- https://alltechsavvy.com/splash-screen-in-flutter-app/

👩‍💻Github Code: https://github.com/sagarshende23/flutter_splashscreen_example

👉👉👉Visit At:- https://alltechsavvy.com/👈👈👈

⚡⚡Best Flutter Development Tools⚡⚡
https://alltechsavvy.com/best-flutter-development-tools/

🔥Github Profile: https://github.com/sagarshende23

#splash screen in flutter #flutter splash screen #flutter splash screen example #flutter

Brain Crist

Brain Crist

1602147600

Flutter App Development Trends 2020

As the new decade dawns upon us, a slew of technologies has been making a lot of noise to grab the developers’ attention. While native app development is going strong, the trade winds are now blowing towards going cross-platform.

Adobe PhoneGap, React Native, Xamarin and Ionic are all leaving no stone unturned to be the undefeated champion of cross-platform development. Still, Google’s Flutter is all set to take them all on at once.

There are a tonne of resources available online to learn about Flutter, and you can start with this step by step flutter guide.

With reduced code development time, increased time-to-market speed, near-native performance, and a bevy of advantages under its hood, Flutter is set to dominate the market this decade.

Before we take a look at trends making the Flutter race ahead in 2020, let us do a quick recap of what Flutter is, for those who have been living under a rock.

#flutter #flutter-for-mobile-app #flutter-app-development #mobile-app-development #flutter-trends #software-development #advantages-of-flutter-mobile #pros-and-cons-of-flutter