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    1.1.9 • Public • Published

    CircleCI branch npm

    React Native Voice

    A speech-to-text library for React Native.

    yarn add @react-native-community/voice
    # or 
    npm i @react-native-community/voice --save

    Link the iOS package

    npx pod-install

    Table of contents


    Manually or automatically link the NativeModule

    react-native link @react-native-community/voice

    Manually Link Android

    • In android/setting.gradle
    include ':@react-native-community_voice', ':app'
    project(':@react-native-community_voice').projectDir = new File(rootProject.projectDir, '../node_modules/@react-native-community/voice/android')
    • In android/app/build.gradle
    dependencies {
        compile project(':@react-native-community_voice')
    • In
    import com.facebook.react.ReactApplication;
    import com.facebook.react.ReactPackage;
    import com.wenkesj.voice.VoicePackage; // <------ Add this!
    public class MainActivity extends Activity implements ReactApplication {
        protected List<ReactPackage> getPackages() {
          return Arrays.<ReactPackage>asList(
            new MainReactPackage(),
            new VoicePackage() // <------ Add this!

    Manually Link iOS

    • Drag the Voice.xcodeproj from the @react-native-community/voice/ios folder to the Libraries group on Xcode in your poject. Manual linking

    • Click on your main project file (the one that represents the .xcodeproj) select Build Phases and drag the static library, lib.Voice.a, from the Libraries/Voice.xcodeproj/Products folder to Link Binary With Libraries


    Full example for Android and iOS.


    import Voice from '@react-native-community/voice';
    import React, {Component} from 'react';
    class VoiceTest extends Component {
      constructor(props) {
        Voice.onSpeechStart = this.onSpeechStartHandler.bind(this);
        Voice.onSpeechEnd = this.onSpeechEndHandler.bind(this);
        Voice.onSpeechResults = this.onSpeechResultsHandler.bind(this);


    Static access to the Voice API.

    All methods now return a new Promise for async/await compatibility.

    Method Name Description Platform
    Voice.isAvailable() Checks whether a speech recognition service is available on the system. Android, iOS
    Voice.start(locale) Starts listening for speech for a specific locale. Returns null if no error occurs. Android, iOS
    Voice.stop() Stops listening for speech. Returns null if no error occurs. Android, iOS
    Voice.cancel() Cancels the speech recognition. Returns null if no error occurs. Android, iOS
    Voice.destroy() Destroys the current SpeechRecognizer instance. Returns null if no error occurs. Android, iOS
    Voice.removeAllListeners() Cleans/nullifies overridden Voice static methods. Android, iOS
    Voice.isRecognizing() Return if the SpeechRecognizer is recognizing. Android, iOS
    Voice.getSpeechRecognitionServices() Returns a list of the speech recognition engines available on the device. (Example: [''] if Google is the only one available.) Android


    Callbacks that are invoked when a native event emitted.

    Event Name Description Event Platform
    Voice.onSpeechStart(event) Invoked when .start() is called without error. { error: false } Android, iOS
    Voice.onSpeechRecognized(event) Invoked when speech is recognized. { error: false } Android, iOS
    Voice.onSpeechEnd(event) Invoked when SpeechRecognizer stops recognition. { error: false } Android, iOS
    Voice.onSpeechError(event) Invoked when an error occurs. { error: Description of error as string } Android, iOS
    Voice.onSpeechResults(event) Invoked when SpeechRecognizer is finished recognizing. { value: [..., 'Speech recognized'] } Android, iOS
    Voice.onSpeechPartialResults(event) Invoked when any results are computed. { value: [..., 'Partial speech recognized'] } Android, iOS
    Voice.onSpeechVolumeChanged(event) Invoked when pitch that is recognized changed. { value: pitch in dB } Android


    Arguably the most important part.


    While the included VoiceTest app works without explicit permissions checks and requests, it may be necessary to add a permission request for RECORD_AUDIO for some configurations. Since Android M (6.0), user need to grant permission at runtime (and not during app installation). By default, calling the startSpeech method will invoke RECORD AUDIO permission popup to the user. This can be disabled by passing REQUEST_PERMISSIONS_AUTO: true in the options argument.

    If you're running an ejected expo/expokit app, you may run into issues with permissions on Android and get the following error host.exp.exponent.MainActivity cannot be cast to com.facebook.react.ReactActivity startSpeech. This can be resolved by prompting for permssion using the expo-permission package before starting recognition.

    import { Permissions } from "expo";
    async componentDidMount() {
    	const { status, expires, permissions } = await Permissions.askAsync(
    	if (status !== "granted") {
    		//Permissions not granted. Don't show the start recording button because it will cause problems if it's pressed.
    		this.setState({showRecordButton: false});
    	} else {
    		this.setState({showRecordButton: true});

    Notes on Android

    Even after all the permissions are correct in Android, there is one last thing to make sure this libray is working fine on Android. Please make sure the device has Google Speech Recognizing Engine such as by calling Voice.getSpeechRecognitionServices(). Since Android phones can be configured with so many options, even if a device has googlequicksearchbox engine, it could be configured to use other services. You can check which serivce is used for Voice Assistive App in following steps for most Android phones:

    Settings > App Management > Default App > Assistive App and Voice Input > Assistive App

    Above flow can vary depending on the Android models and manufactures. For Huawei phones, there might be a chance that the device cannot install Google Services.

    How can I get in the device?

    Please ask users to install Google Search App.


    Need to include permissions for NSMicrophoneUsageDescription and NSSpeechRecognitionUsageDescription inside Info.plist for iOS. See the included VoiceTest for how to handle these cases.

      <string>Description of why you require the use of the microphone</string>
      <string>Description of why you require the use of the speech recognition</string>

    Please see the documentation provided by ReactNative for this: PermissionsAndroid


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    • @ohtangza & @hayanmind
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    • @tdonia
    • @wenkesj


    npm i @react-native-community/voice

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