speech_recognition

A flutter plugin to use the speech recognition iOS10+ / Android 4.1+

• Basic Example
• Sytody, speech to todo app

Installation

1. Depend on it Add this to your package’s pubspec.yaml file:

dependencies:
  speech_recognition: "^0.3.0"

1. Install it You can install packages from the command line:

$ flutter packages get

1. Import it Now in your Dart code, you can use:

import 'package:speech_recognition/speech_recognition.dart';

Usage

//..
_speech = SpeechRecognition();

// The flutter app not only call methods on the host platform,
// it also needs to receive method calls from host.
_speech.setAvailabilityHandler((bool result) 
  => setState(() => _speechRecognitionAvailable = result));

// handle device current locale detection
_speech.setCurrentLocaleHandler((String locale) =>
 setState(() => _currentLocale = locale));

_speech.setRecognitionStartedHandler(() 
  => setState(() => _isListening = true));

// this handler will be called during recognition. 
// the iOS API sends intermediate results,
// On my Android device, only the final transcription is received
_speech.setRecognitionResultHandler((String text) 
  => setState(() => transcription = text));

_speech.setRecognitionCompleteHandler(() 
  => setState(() => _isListening = false));

// 1st launch : speech recognition permission / initialization
_speech
    .activate()
    .then((res) => setState(() => _speechRecognitionAvailable = res));
//..

speech.listen(locale:_currentLocale).then((result)=> print('result : $result'));

// ...

speech.cancel();

// ||

speech.stop();

Recognition

• iOS : Speech API
• Android : SpeechRecognizer

Permissions

iOS

 iOS : Swift 4.2 project

infos.plist, add :

• Privacy – Microphone Usage Description
• Privacy – Speech Recognition Usage Description

<key>NSMicrophoneUsageDescription</key>
<string>This application needs to access your microphone</string>
<key>NSSpeechRecognitionUsageDescription</key>
<string>This application needs the speech recognition permission</string>

Android

<uses-permission android:name="android.permission.RECORD_AUDIO" />

Limitation

On iOS, by default the plugin is configured for French, English, Russian, Spanish, Italian. On Android, without additional installations, it will probably works only with the default device locale.

Troubleshooting

If you get a MissingPluginException, try to flutter build apk on Android, or flutter build ios

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.

Download Flutter speech recognition plugin source code on GitHub

https://github.com/rxlabz/speech_recognition