A Flutter plugin to use speech recognition on iOS & Android


Speech recognition, or speech-to-text, is the ability of a machine or program to identify words spoken aloud and convert them into readable text. 

Speech recognition uses a broad array of research in computer science, linguistics, and computer engineering. Many modern devices and text-focused programs have speech recognition functions in them to allow for easier or hands-free use of a device.

In this article, we will discuss the Flutter plugin to use speech recognition on iOS + & Android 4.1+ , from install, usage, and permissions. Now, check it out and let’s begin. 

flutter plugin


Firstly, The install step:

  1. Depend on it
    Add this to your package’s pubspec.yaml file:
  speech_recognition: "^0.2.0+1"

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

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

  1. Import it
    Now in your Dart code, you can use:
import 'package:speech_recognition/speech_recognition.dart';


Next, the Usage step:

_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));

  => 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));

  => setState(() => _isListening = false));

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

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

// ...


// ||





infos.plist, add :

  • Privacy – Microphone Usage Description
  • Privacy – Speech Recognition Usage Description
<string>This application needs to access your microphone</string>
<string>This application needs the speech recognition permission</string>

:warning: Swift project

This plugin is written in swift, so to use with in a Flutter/ObjC project,
you need to convert the project to “Current swift syntax” ( Edit/Convert/current swift syntax)


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


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


Written by James

An amazing Flutter audio recorder and player at one hand

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