Styjun

I am currently making an android app where I need to verify if the user is entering correct mobile number using the OTP.
The user is already signed in the application using his email and password.
Now I need to verify the mobile number the user enters without using the signInWithCrendntial() method of firebase phone auth.
How do i go about it ?

My mCallbacks is

 @Override
 public void onVerificationCompleted(PhoneAuthCredential credential) 
 Toast.makeText(getApplicationContext(), "Verification Complete", Toast.LENGTH_SHORT).show();

 showMessage("Success!!","OTP verified!" + credential);
 cred = credential;
 //btn_add_guest.setEnabled(true);

 

 @Override
 public void onVerificationFailed(FirebaseException e) 
 Toast.makeText(getApplicationContext(), "Verification Failed", Toast.LENGTH_SHORT).show();
 Log.i(TAG,"Error is "+e.getMessage());
 

 @Override
 public void onCodeSent(String verificationId,
 PhoneAuthProvider.ForceResendingToken token) 
 Toast.makeText(getApplicationContext(), "Code Sent", Toast.LENGTH_SHORT).show();
 mVerificationId = verificationId;
 mResendToken = token;

 Log.i(TAG,"VERFICATION ID IS"+mVerificationId);
 Log.i(TAG,"RESEND TOKEN"+mResendToken);
 btn_add_guest.setEnabled(false);
 
 };

I m calling this method on button Pressed where put_otp is textView where user enters the OTP.

verifyPhoneNumberWithCode(mVerificationId,put_otp.getText().toString());
 PhoneAuthCredential credential = PhoneAuthProvider.getCredential(mVerificationId, put_otp.getText().toString());
 Log.i(TAG,credential.getProvider());

private void verifyPhoneNumberWithCode(String verificationId, String code) 

 Log.i(TAG,"RESEND TOKEN IN METHOD IS"+mResendToken); if(code.equals(mResendToken)&&verificationId.equals(mVerificationId))
 Toast.makeText(AddGuestActivity.this, "Verification Success", Toast.LENGTH_SHORT).show();

 btn_add_guest.setEnabled(true);
 
 else
 Toast.makeText(this,"Please provide correct OTP",Toast.LENGTH_SHORT).show();
 

You can link an email/pass account with a phone account https://firebase.google.com/docs/auth/android/account-linking?authuser=0