Firebase Auth - Password-less Phone - Demo

FirebaseAuthPhone

implementation 'com.google.android.gms:play-services-auth:17.0.0'

implementation 'com.google.firebase:firebase-auth:19.2.0'


<uses-permission android:name="android.permission.INTERNET"/>


// Initialize Firebase Auth
FirebaseAuth mAuth;
mAuth = FirebaseAuth.getInstance();

PhoneAuthProvider.getInstance().verifyPhoneNumber(
        mobileNumber,                      // Phone number to verify
        60,                               // Timeout duration
        TimeUnit.SECONDS,                // Unit of timeout
        activity,                       // Activity (for callback binding)
        getVerificationCallback());    // OnVerificationStateChangedCallbacks  
        
        
private OnVerificationStateChangedCallbacks getVerificationCallback() {
      if (verificationCallback == null)
          verificationCallback = new OnVerificationStateChangedCallbacks() {
              @Override
              public void onVerificationCompleted(@NonNull PhoneAuthCredential phoneAuthCredential) {
                  Log.d(TAG, "onVerificationCompleted:" + phoneAuthCredential);
              }

              @Override
              public void onVerificationFailed(@NonNull FirebaseException e) {
                  Log.w(TAG, "onVerificationFailed", e);
                  if (e instanceof FirebaseAuthInvalidCredentialsException) {
                      // Invalid request
                      if (e.getLocalizedMessage().contains("The format of the phone number provided is incorrect."))
                          Log.d(TAG, "onVerificationFailed: The format of the phone number provided is incorrect.")
                      else
                          Log.d(TAG, "onVerificationFailed: Invalid credential");
                  } else if (e instanceof FirebaseTooManyRequestsException) {
                      // The SMS quota for the project has been exceeded
                      Log.d(TAG, "onVerificationFailed: FirebaseTooManyRequestsException");
                  } else
                      Log.d(TAG, "onVerificationFailed");
              }

              @Override
              public void onCodeSent(@NonNull String verificationId,
                                     @NonNull ForceResendingToken token) {

                  // The SMS verification code has been sent to the provided phone number
                  Log.d(TAG, "onCodeSent:" + verificationId)
                  
                  // Save verification ID and resending token so we can use them later
                  mVerificationId = verificationId;
                  resendingToken = token;
              }
          };

      return verificationCallback;
  }        
  
  PhoneAuthCredential credential = PhoneAuthProvider.getCredential(mVerificationId, code);
  
  mAuth.signInWithCredential(credential)
            .addOnCompleteListener(activity, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        // Sign in success, update UI with the signed-in user's information
                        Log.d(TAG, "signInWithCredential:success");

                        if (task.getResult() != null) {
                            FirebaseUser user = task.getResult().getUser();
                            if (user != null && !TextUtils.isEmpty(user.getPhoneNumber()))
                                Log.d(TAG, "signInWithCredential: " + user.getPhoneNumber());
                        }
                    } else {
                        // Sign in failed, display a message and update the UI
                        Log.w(TAG, "signInWithCredential:failure", task.getException());
                         
                        if (task.getException() instanceof FirebaseAuthInvalidCredentialsException) {
                            // Invalid request
                            Log.d(TAG, "signInWithCredential: Invalid");
                        } else if (task.getException() instanceof FirebaseTooManyRequestsException) {
                            // The SMS quota for the project has been exceeded
                            Log.d(TAG, "signInWithCredential: FirebaseTooManyRequestsException");
                        } else
                            Log.d(TAG, "signInWithCredential: Failed");
                    }
                }
            });
            
if (resendingToken != null) {
       PhoneAuthProvider.getInstance().verifyPhoneNumber(
               mobileNumber,                 // Phone number to verify
               60,                           // Timeout duration
               TimeUnit.SECONDS,             // Unit of timeout
               activity,                     // Activity (for callback binding)
               getVerificationCallback(),    // OnVerificationStateChangedCallbacks
               resendingToken);              // Resending token received from onCodeSent callback
 }
            
            
// For example use *es* for Spanish
mAuth.setLanguageCode("YOUR_LANGUAGE_CODE");