voice_recognition

A Flutter plugin that provides voice recognition with support for multiple languages. This plugin allows you to implement real-time speech-to-text functionality in your Flutter applications.

Features

• Real-time voice recognition
• Support for multiple languages
• Continuous recognition mode
• Speech recognition events handling
• Get list of available locales

Getting Started

Platform Specific Setup

Android

Add the following permission to your Android Manifest (android/app/src/main/AndroidManifest.xml):

    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.INTERNET" />
    <queries>
        <intent>
            <action android:name="android.speech.RecognitionService" />
        </intent>
    </queries>

Usage

Basic Implementation

import 'package:voice_recognition/voice_recognition.dart';

// Create an instance of VoiceRecognition
final voiceRecognition = VoiceRecognition();

// Set preferred language
voiceRecognition.setLanguages("bn-BD"); // Example for Bengali language

// Start listening
await voiceRecognition.startVoice();

// Stop listening
await voiceRecognition.stopVoice();

// Get all available locales
final locales = await voiceRecognition.getAllLocal();

Setting Up Listeners

voiceRecognition.listenResult(
  onReadyForSpeech: (ready) {
    // Called when the recognizer is ready to listen
  },
  onBeginningOfSpeech: (beginning) {
    // Called when the user starts speaking
  },
  onRmsChanged: (rmsDb) {
    // Called when the audio level changes
    print("Audio level: $rmsDb");
  },
  onResults: (results) async {
    // Called when recognition results are ready
    print("Recognition result: $results");
    
    // For continuous recognition, start listening again
    await voiceRecognition.startVoice();
  },
  onError: (error) {
    // Handle any errors
    print("Error: $error");
  },
  onEndOfSpeech: (end) {
    // Called when the user stops speaking
  },
  onPartialResults: (partial) {
    // Called when partial recognition results are available
  },
  onEvent: (event) {
    // Handle other recognition events
  },
);

Methods

• setLanguages(String locale): Set the recognition language
• startVoice(): Start voice recognition
• stopVoice(): Stop voice recognition
• getAllLocal(): Get list of available locales

Callbacks

• onReadyForSpeech: Called when the recognizer is ready
• onBeginningOfSpeech: Called when speech input starts
• onRmsChanged: Audio level changes
• onBufferReceived: Raw audio buffer updates
• onEndOfSpeech: Called when speech input ends
• onError: Error handling
• onResults: Final recognition results
• onPartialResults: Intermediate recognition results
• onEvent: Other recognition events

Supported Languages

The plugin supports multiple languages. Use the getAllLocal() method to get a list of available locales on the device.

Example locales:

• English (US): "en-US"
• Bengali: "bn-BD"
• Hindi: "hi-IN"
• And many more...