CODEWITHSUNDEEP
androidfirebasefirebase-authentication
Thiago Saraiva
Thiago Saraiva

Reputation: 13

How to know if user who signed in with Google is a new user?

I need to know if the user who has just signed in with Google is a new user, so I can take an action needed for new users in my app. I heard about this method isNewUser() , but I'm actually not familiar with abstract methods and I don't know exactly how I can use it in my situation: https://firebase.google.com/docs/reference/android/com/google/firebase/auth/AdditionalUserInfo.html#isNewUser()

AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
    mFirebaseAuth.signInWithCredential(credential)
            .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                @Override
                public void onComplete(@NonNull Task<AuthResult> task) {
                    if (task.isSuccessful()) {
                        Log.d(TAG, "signInWithCredential:success");
                        // TAKE ACTION IF IT IS A NEW USER.
                    } else {
                        Log.w(TAG, "signInWithCredential:failure", task.getException());
                        Toast.makeText(MainActivity.this, R.string.authentication_failed,
                                Toast.LENGTH_SHORT).show();
                    }
                }
            });

Thanks in advance!

Upvotes: 1

Views: 302

Answers (2)

bojeil
bojeil

Reputation: 30818

There is actually a better way to do this now. To check if a user is new or existing after sign in, use isNewUser: https://firebase.google.com/docs/reference/android/com/google/firebase/auth/AdditionalUserInfo#isNewUser() which is on AdditionalUserInfo, available on AuthResult when the task resolves.

Upvotes: 0

Doug Stevenson
Doug Stevenson

Reputation: 317552

You're better off defining for yourself what it means to be a "new user", and using a database to reflect that. For example, if a user doesn't have any data in your database keyed by their UID, you could make the assumption that they are new. Then you update the database to reflect the fact that they are no longer new.

Upvotes: 2

Related Questions