I have successfully deployed tutorial code from https://firebase.google.com/docs/auth/android/facebook-login for integrating Firebase Auth logins with Facebook. The users successfully created in Firebase Auth console.
However, I noticed that the Email field in the user object is empty (—). Strangely, I successfully retrieved the email information directly from provider result objects using GraphRequest using the acquired token.
Based on the documentation I read (https://firebase.google.com/docs/reference/android/com/google/firebase/auth/FirebaseUser.html#getEmail()), the email field should be populated from login providers.
Some additional strange behaviour:
Is there something I miss or did I do something wrong?
Here's my code:
public class LoginActivity extends AppCompatActivity { private static final String TAG = "LOGIN_ACTIVITY"; private static final int RC_SIGN_IN = 777; private EventBus eventBus; private SweetAlertDialog pDialog; private FirebaseAuth mAuth; private FirebaseAuth.AuthStateListener mAuthListener; private CallbackManager mCallbackManager; private ImageView mPasswordVisibilityView; private TextView txtPassword; private boolean justEnteredAuthStateChanged = false; private GoogleApiClient mGoogleApiClient; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); FacebookSdk.sdkInitialize(getApplicationContext()); setContentView(R.layout.login); // Firebase mAuth = FirebaseAuth.getInstance(); mAuthListener = new FirebaseAuth.AuthStateListener() { @Override public void onAuthStateChanged(@NonNull final FirebaseAuth firebaseAuth) { final FirebaseUser user = firebaseAuth.getCurrentUser(); if (user != null) { // User is signed in Util.logassert("Auth Provider = " + firebaseAuth.getCurrentUser().getProviderId()); // this is called twice, values of Provider = Firebase Util.logassert("total provider = " + user.getProviderData().size()); // output = 2. "Firebase" and "facebook.com" for (int i = 0; i < user.getProviderData().size(); i++) { UserInfo info = user.getProviderData().get(i); Util.logassert(info.getProviderId() + ", email = " + info.getEmail()); // both empty Util.logassert("current provider = " + info.getProviderId() + " - " + info); } } else { Util.logassert("onAuthStateChanged user logged out"); } // ... } }; mAuth.addAuthStateListener(mAuthListener); // Firebase Facebook TapAuth // Initialize Facebook Login button mCallbackManager = CallbackManager.Factory.create(); LoginManager.getInstance().registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() { @Override public void onSuccess(LoginResult loginResult) { Util.logassert("facebook:onSuccess:" + loginResult); handleFacebookAccessToken(loginResult.getAccessToken()); Util.logassert("granted = " + loginResult.getRecentlyGrantedPermissions()); // output [email and public_profile] Util.logassert("denied = " + loginResult.getRecentlyDeniedPermissions()); } @Override public void onCancel() { Util.logassert("facebook:onCancel"); // ... } @Override public void onError(FacebookException error) { Util.logassert("facebook:onError" + error.getMessage()); // ... } }); FancyButton btnFacebook = (FancyButton) findViewById(R.id.btn_facebook_share); btnFacebook.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { LoginManager.getInstance().logInWithReadPermissions(LoginActivity.this, Arrays.asList("public_profile", "email")); Util.logassert("try facebook login"); } }); txtPassword = (EditText) findViewById(R.id.input_password); } private void handleFacebookAccessToken(AccessToken token) { Util.logassert("handleFacebookAccessToken:" + token); GraphRequest request = GraphRequest.newMeRequest( token, new GraphRequest.GraphJSONObjectCallback() { @Override public void onCompleted( JSONObject object, GraphResponse response) { // Application code Log.v("LoginActivity", response.toString()); Util.logassert("graph res = " + response.getRawResponse()); try { /* successfully output email address from graph request here */ FbGraphEvent event = new FbGraphEvent(response.getJSONObject().getString("email"), response.getJSONObject().getString("name")); EventBus.getDefault().postSticky(event); } catch (Exception e) { Log.e("MomInvoice", "Error in parsing json fb graph", e); } } }); Bundle parameters = new Bundle(); parameters.putString("fields", "email,name"); request.setParameters(parameters); request.executeAsync(); AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken()); mAuth.signInWithCredential(credential) .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() { @Override public void onComplete(@NonNull Task<AuthResult> task) { Util.logassert("signInWithCredential:onComplete:" + task.isSuccessful()); if (!task.isSuccessful()) { Util.logassert("signInWithCredential failed coz = " + task.getException().getMessage()); Toast.makeText(LoginActivity.this, "Authentication failed :(", Toast.LENGTH_SHORT).show(); } } }); } @Override public void onStart() { super.onStart(); Util.logassert("masuk onStart LoginActivity"); } @Override protected void onStop() { super.onStop(); } @Override protected void onDestroy() { if (mAuthListener != null) { mAuth.removeAuthStateListener(mAuthListener); } super.onDestroy(); } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (mCallbackManager != null) { mCallbackManager.onActivityResult(requestCode, resultCode, data); Util.logassert("hasilx " + requestCode + " = " + resultCode); } } }
Enable Facebook Login: In the Firebase console, open the Auth section. On the Sign in method tab, enable the Facebook sign-in method and specify the App ID and App Secret you got from Facebook.
So, if your not getting email address, then please go over to General settings and see whether primary account is set to email address or not. Show activity on this post. I found the same issue, where email was set to "--" on firebase auth. I was missing permission to read email, which I fixed by:
If you haven't already, add Firebase to your Android project . On the Facebook for Developers site, get the App ID and an App Secret for your app. In the Firebase console, open the Auth section. On the Sign in method tab, enable the Facebook sign-in method and specify the App ID and App Secret you got from Facebook.
This new account is stored as part of your Firebase project, and can be used to identify a user across every app in your project, regardless of how the user signs in. In your apps, you can get the user's basic profile information from the FirebaseUser object.
after reading post in firebase-talk google group here https://groups.google.com/forum/#!topic/firebase-talk/gPGNq-IkTLo, I found out the answer. The issue was happened because I'm using "Allow creation of multiple accounts with the same email address" in Firebase Auth sign-in method.
So I change the option into: "Prevent creation of multiple accounts with the same email address" can it's working properly now. It's simple as that. It's true I need more logic to merge accounts having the same email address, but it's okay.
Maybe everyone else having the same issue, can also try this, and hopefully it's solved as well.
Some Facebook accounts are created using Mobile numbers, so whenever we request for email address we get an empty string.
In the following image, you can see that the facebook account can either set their Primary contact as email address or Mobile number. So, if a person has marked mobile number as primary, then their email address can't be retrieved.
In my case, I had forgot to verify my facebook account, so initially my email address wasn't even showing in Primary contact. So, if your not getting email address, then please go over to General settings and see whether primary account is set to email address or not.
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