speech_recognition 0.2.0+1

  • README.md
  • CHANGELOG.md
  • Example
  • Installing
  • Versions
  • 90

speech_recognition

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

Usage

//..
_speech = new 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. 
// iOs allow to send the 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();

Permissions

iOS

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

Getting Started

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

For help on editing plugin code, view the documentation.

0.2.0+

  • use the device detected locale by default

0.1.0

  • basic recognition

example/lib/main.dart

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

void main() {
  runApp(new MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

class _MyAppState extends State<MyApp> {
  SpeechRecognition _speech;

  bool _speechRecognitionAvailable = false;
  bool _isListening = false;

  String transcription = '';

  String _currentLocale = 'en_US';

  @override
  initState() {
    super.initState();
    activateSpeechRecognizer();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  void activateSpeechRecognizer() {
    print('_MyAppState.activateSpeechRecognizer... ');
    _speech = new SpeechRecognition();
    _speech.setAvailabilityHandler(onSpeechAvailability);
    _speech.setCurrentLocaleHandler(onCurrentLocale);
    _speech.setRecognitionStartedHandler(onRecognitionStarted);
    _speech.setRecognitionResultHandler(onRecognitionResult);
    _speech.setRecognitionCompleteHandler(onRecognitionComplete);
    _speech
        .activate()
        .then((res) => setState(() => _speechRecognitionAvailable = res));
  }

  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('SpeechRecognition'),
        ),
        body: new Padding(
            padding: new EdgeInsets.all(8.0),
            child: new Center(
              child: new Column(
                mainAxisSize: MainAxisSize.min,
                crossAxisAlignment: CrossAxisAlignment.stretch,
                children: [
                  new Expanded(
                      child: new Container(
                          padding: const EdgeInsets.all(8.0),
                          color: Colors.grey.shade200,
                          child: new Text(transcription))),
                  _buildButton(
                    onPressed: _speechRecognitionAvailable && !_isListening
                        ? () => start()
                        : null,
                    label: _isListening
                        ? 'Listening...'
                        : 'Listen ($_currentLocale)',
                  ),
                  _buildButton(
                    onPressed: _isListening ? () => cancel() : null,
                    label: 'Cancel',
                  ),
                  _buildButton(
                    onPressed: _isListening ? () => stop() : null,
                    label: 'Stop',
                  ),
                ],
              ),
            )),
      ),
    );
  }

  Widget _buildButton({String label, VoidCallback onPressed}) => new Padding(
      padding: new EdgeInsets.all(12.0),
      child: new RaisedButton(
        color: Colors.cyan.shade600,
        onPressed: onPressed,
        child: new Text(
          label,
          style: const TextStyle(color: Colors.white),
        ),
      ));

  void start() => _speech
      .listen(locale: _currentLocale)
      .then((result) => print('_MyAppState.start => result ${result}'));

  void cancel() =>
      _speech.cancel().then((result) => setState(() => _isListening = result));

  void stop() =>
      _speech.stop().then((result) => setState(() => _isListening = result));

  void onSpeechAvailability(bool result) =>
      setState(() => _speechRecognitionAvailable = result);

  void onCurrentLocale(String locale) =>
      setState(() => _currentLocale = locale);

  void onRecognitionStarted() => setState(() => _isListening = true);

  void onRecognitionResult(String text) => setState(() => transcription = text);

  void onRecognitionComplete() => setState(() => _isListening = false);
}

Use this package as a library

1. Depend on it

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


dependencies:
  speech_recognition: ^0.2.0+1

2. Install it

You can install packages from the command line:

with Flutter:


$ flutter packages get

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

3. Import it

Now in your Dart code, you can use:


import 'package:speech_recognition/speech_recognition.dart';
  
Version Uploaded Documentation Archive
0.2.0+1 Jun 12, 2017 Go to the documentation of speech_recognition 0.2.0+1 Download speech_recognition 0.2.0+1 archive
0.2.0 Jun 12, 2017 Go to the documentation of speech_recognition 0.2.0 Download speech_recognition 0.2.0 archive
Popularity:
Describes how popular the package is relative to other packages. [more]
87
Health:
Code health derived from static analysis. [more]
100
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
80
Overall:
Weighted score of the above. [more]
90
Learn more about scoring.

We analyzed this package on Aug 10, 2018, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.0.0
  • pana: 0.11.8
  • Flutter: 0.5.7

Platforms

Detected platforms: Flutter

References Flutter, and has no conflicting libraries.

Issues and suggestions

Add SDK constraint in pubspec.yaml.

For information about setting SDK constraint, please see https://www.dartlang.org/tools/pub/pubspec#sdk-constraints.

Package is getting outdated.

The package was released 60 weeks ago.

Package is pre-v1 release.

While there is nothing inherently wrong with versions of 0.*.*, it usually means that the author is still experimenting with the general direction of the API.

Dependencies

Package Constraint Resolved Available
Direct dependencies
flutter 0.0.0
Transitive dependencies
collection 1.14.6 1.14.11
meta 1.1.5 1.1.6
sky_engine 0.0.99
typed_data 1.1.5 1.1.6
vector_math 2.0.6 2.0.8