Firebase Auth get additional user info (age, gender)

Question

I am using Firebase Authentication for my Android app. Users have the ability to login with multiple providers (Google, Facebook, Twitter).

After a successful login,

Answer 1

No, you can't get these data directly. But you can use the id of the user and get these data from various providers. Please check before what are the data that are available in the public API for each of these providers for instance google just deprecated few methods from the peopleApi.

Anyways here is what i do for facebook

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

// Create a listener
FirebaseAuth.AuthStateListener mAuthListener = firebaseAuth -> {
        FirebaseUser user = firebaseAuth.getCurrentUser();
        if (user != null) {
            // User is signed in
            Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());
        } else {
            // User is signed out
            Log.d(TAG, "onAuthStateChanged:signed_out");
        }

        if (user != null) {
            Log.d(TAG, "User details : " + user.getDisplayName() + user.getEmail() + "\n" + user.getPhotoUrl() + "\n"
                    + user.getUid() + "\n" + user.getToken(true) + "\n" + user.getProviderId());

            String userId = user.getUid(); 
            String displayName = user.getDisplayName();
            String photoUrl = String.valueOf(user.getPhotoUrl());
            String email = user.getEmail();

            Intent homeIntent = new Intent(LoginActivity.this, HomeActivity.class);
            startActivity(homeIntent);
            finish();
        }
    };

//Initialize the fB callbackManager
mCallbackManager = CallbackManager.Factory.create();

And do the following inside the onClick of the FB login button

LoginManager.getInstance().registerCallback(mCallbackManager,
            new FacebookCallback() {
                @Override
                public void onSuccess(LoginResult loginResult) {
                    Log.d(TAG, "facebook:onSuccess:" + loginResult);
                    handleFacebookAccessToken(loginResult.getAccessToken());
                }

                @Override
                public void onCancel() {
                    Log.d(TAG, "facebook:onCancel");
                }

                @Override
                public void onError(FacebookException error) {
                    Log.d(TAG, "facebook:onError", error);
                }
            });

LoginManager.getInstance().logInWithReadPermissions(this, Arrays.asList("public_profile", "email"));