dev-aritra

public interface ISpeechToText
    {
        void StartSpeechToText();
        void StopSpeechToText();
    }

dev-aritra

using AVFoundation;
using Foundation;
using Speech;
using System;
using Xamarin.Forms;
using XFSpeechDemo.iOS;

[assembly: Xamarin.Forms.Dependency(typeof(SpeechToTextImplementation))]
namespace XFSpeechDemo.iOS
{

dev-aritra

private void AskForSpeechPermission()
        {
            SFSpeechRecognizer.RequestAuthorization((SFSpeechRecognizerAuthorizationStatus status) =>
            {
                switch (status)
                {
                    case SFSpeechRecognizerAuthorizationStatus.Authorized:
                        MessagingCenter.Send<ISpeechToText>(this, "Authorized");
                        break;
                    case SFSpeechRecognizerAuthorizationStatus.Denied:

dev-aritra

        private AVAudioEngine _audioEngine = new AVAudioEngine();
        private SFSpeechRecognizer _speechRecognizer = new SFSpeechRecognizer();
        private SFSpeechAudioBufferRecognitionRequest _recognitionRequest;
        private SFSpeechRecognitionTask _recognitionTask;
        private string _recognizedString;
        private NSTimer _timer;
        private bool isNotContinious;

dev-aritra

public void StartSpeechToText()
        {

            if (_audioEngine.Running)
            {
                StopRecordingAndRecognition();

            }
            StartRecordingAndRecognizing();
        }

dev-aritra

 private void StartRecordingAndRecognizing()
        {
            if(isNotContinious)
            {
                _timer = NSTimer.CreateRepeatingScheduledTimer(5, delegate
                {
                    DidFinishTalk();
                });
            }
            

dev-aritra

MessagingCenter.Subscribe<ISpeechToText, string>(this, "STT", (sender, args) => {
                Console.WriteLine(args);
            });

            MessagingCenter.Subscribe<ISpeechToText>(this, "Final", (sender) => {
                Console.WriteLine("Recognition finished");
            });

dev-aritra

string rec = global::Android.Content.PM.PackageManager.FeatureMicrophone;
            if (rec == "android.hardware.microphone")
            {
                
            }

dev-aritra

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;

dev-aritra

private void StartRecordingAndRecognizing()
        {
            string rec = global::Android.Content.PM.PackageManager.FeatureMicrophone;
            if (rec == "android.hardware.microphone")
            {
                var voiceIntent = new Intent(RecognizerIntent.ActionRecognizeSpeech);
                voiceIntent.PutExtra(RecognizerIntent.ExtraLanguageModel, RecognizerIntent.LanguageModelFreeForm);


                voiceIntent.PutExtra(RecognizerIntent.ExtraPrompt, "Speak now");