Younes-Charfaoui

val textToSpeech = TextToSpeech(this, this)

Younes-Charfaoui

private fun saySomething(something: String, queueMode: Int = TextToSpeech.QUEUE_ADD) {
      val speechStatus = textToSpeech.speak(something, queueMode, null, "ID")
      if (speechStatus == TextToSpeech.ERROR) {
          Toast.makeText(this, "Cant use the Text to speech.", Toast.LENGTH_LONG).show()
      }
}

Younes-Charfaoui

override fun onInit(status: Int) {
      // check the results in status variable.
      if (status == TextToSpeech.SUCCESS) {
          // setting the language to the default phone language.
          val ttsLang = textToSpeech.setLanguage(Locale.getDefault())
          // check if the language is supportable.
          if (ttsLang == TextToSpeech.LANG_MISSING_DATA || ttsLang == TextToSpeech.LANG_NOT_SUPPORTED) {
              Toast.makeText(this, "We can't support your language", Toast.LENGTH_LONG).show()
          }
      } else {

Younes-Charfaoui

textToSpeech.setOnUtteranceProgressListener(object : UtteranceProgressListener() {

    override fun onDone(utteranceId: String?) {
      //do whatever you want when TTS finish speaking.
    }

    override fun onError(utteranceId: String?) {
      //do whatever you want if TTS makes an error.
    }

Younes-Charfaoui

override fun onVerificationCompleted(credential: PhoneAuthCredential?) {
        if (credential != null && storedVerificationId != null)
            signInWithPhoneAuthCredential(credential)
        else {
            Toast.makeText(
                this,
                "Something went wrong, please try later.",
                Toast.LENGTH_LONG).show()
            finish()
        }

Younes-Charfaoui

override fun onVerificationFailed(exception: FirebaseException?) {
        Toast.makeText(
            this, "Something went wrong, try again later please.",
            Toast.LENGTH_LONG).show()
        finish()
}

Younes-Charfaoui

override fun onCodeSent(
        verificationId: String?,
        token: PhoneAuthProvider.ForceResendingToken?
    ) {
        storedVerificationId = verificationId!!
        resendToken = token!!
    }

Younes-Charfaoui

private fun signInWithPhoneAuthCredential(credential: PhoneAuthCredential) {
        auth.signInWithCredential(credential)
            .addOnCompleteListener(this) {
                if (it.isSuccessful) {
                  // Successful mean that the phone is verified, so do whatever you want here.
                } else {
                    Toast.makeText(
                        this,
                        "Something went wrong, try again later please.",
                        Toast.LENGTH_LONG).show()

Younes-Charfaoui

import com.google.firebase.FirebaseException
import com.google.firebase.auth.PhoneAuthCredential
import com.google.firebase.auth.PhoneAuthProvider

class PhoneCallbacks(private val listener : PhoneCallbacksListener) : PhoneAuthProvider.OnVerificationStateChangedCallbacks() {

    interface PhoneCallbacksListener {
        fun onVerificationCompleted(credential: PhoneAuthCredential?)
        fun onVerificationFailed(exception: FirebaseException?)
        fun onCodeSent(

Younes-Charfaoui

class PhoneVerificationActivity : AppCompatActivity(), PhoneCallbacks.PhoneCallbacksListener {

    private lateinit var auth: FirebaseAuth
    private var storedVerificationId: String? = null
    private lateinit var resendToken: PhoneAuthProvider.ForceResendingToken

    override fun onCreate(savedInstanceState: Bundle?) {
        ....
        auth = FirebaseAuth.getInstance()
        auth.setLanguageCode(Locale.getDefault().language)