Reconhecedor de voz

speech.ts

import { Component, NgZone  } from '@angular/core';

import { Platform, ToastController  } from 'ionic-angular';
import { NavController } from 'ionic-angular';

//declare var SpeechRecognition: any;
//OnStart - Para ativar a escuta.
//OnEnd - Para parar de ouvir.
//OnError - Para exibir erro no toast.
//OnResult - Para adicionar texto na lista.
declare let platform: any;
declare let window: any;

@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

  recognition: any;
  ready: boolean = false;
  isWaiting: boolean = false;
  errorCordova : string = "No error";
  public statusSpeaker : string;
  public resultText : string;
  public isRecognizing : boolean = false;
  public spokenWords : Array<string> = new Array<string>()
  counter : number = 0;

  constructor(
    public navCtrl: NavController,
    platform: Platform,
    public  _zone: NgZone,
    public toastCtrl: ToastController
  ) {

    platform = platform;
    platform.ready().then(() => {
      this.ready = true;
      console.log("O reconhecimento é " + this.recognition)
      if(window.SpeechRecognition)
      {
          this.recognition = new window.SpeechRecognition();
          this.recognition.start();

          this.recognition.continuous = true;
          this.recognition.lang = 'en-US';
          this.recognition.maxAlternatives = 3;
          this.recognition.onnomatch = (event => {
              console.log('No match found.');
          });
          this.recognition.onstart = (event => {
              console.log('Reconhecimento iniciado.');
              this._zone.run(() => {
                  this.isRecognizing = true;
                  this.isWaiting = false;
              }
              )
          });

          this.recognition.onend = (event => {
              console.log('Reconhecimento parado.');
              this._zone.run(() => {
                  this.isRecognizing = false;
                  this.presentToast("Reconhecimento parado.")
                  this.isWaiting = false;
              })
          });

          this.recognition.onerror = (event => {
              console.log('Error...' + event.error);
              this._zone.run(() => {
                  this.errorCordova = 'Error'
                  this.isRecognizing = false;
                  this.presentToast("Error..." + event.error)
                  this.isWaiting = false;
              }
              )
          });

          this.recognition.onresult = (event => {
                  if (event.results) {
                        this._zone.run(() => {
                            var result = event.results[0];
                            this.resultText = 'Ultimo texto adicionado : \n' + result[0].transcript
                            this.spokenWords.push(result[0].transcript);
                            console.log('Text: ' + result[0].transcript);
                            this.presentToast(this.resultText)
                    }
                )
                this.isWaiting = false;
                        this.isRecognizing = false;
              }
          });

      }
    });
  }

  presentToast(message) {
    let toast = this.toastCtrl.create({
      message: message,
      position : "middle",
      duration: 3000
    });
    toast.present();
  }


  SpeechToText(){
    this.statusSpeaker = 'Esperando...';
    console.log('entrou')
    if(!this.isRecognizing)
    {
      console.log(this.recognition)
        this.recognition.start();
        this.isWaiting = true;
    }
    else
    {
        this.isWaiting = true;
        console.log('errou ou acerto')
    }
  }
}