问题
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:
- After successful login, the onAuthStateChanged is called twice. The value of firebaseAuth.getCurrentUser().getProviderId() is Firebase on both occasion
- I try to list down the providers from the FirebaseUser object, user.getProviderData(). I got two providers: firebase and facebook.com
- When I tried to update email using FirebaseUser.updateEmail(event.getEmail()), I got this error: An internal error has occurred. [ EMAIL_EXISTS ]
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);
}
}
}
回答1:
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.
回答2:
I found the same issue, where email was set to "--" on firebase auth. I was missing permission to read email, which I fixed by:
LoginButton mFacebookSignInButton = (LoginButton) findViewById(R.id.facebook_sign_in_button);
mFacebookSignInButton.setReadPermissions("email", "public_profile");
I hope this helps somebody in future having same issue.
回答3:
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.
回答4:
I found the solution. Here is my code
import android.app.ProgressDialog;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import com.app.pizzawheel.Common.Globals;
import com.facebook.AccessToken;
import com.facebook.AccessTokenTracker;
import com.facebook.CallbackManager;
import com.facebook.FacebookCallback;
import com.facebook.FacebookException;
import com.facebook.FacebookSdk;
import com.facebook.GraphRequest;
import com.facebook.GraphResponse;
import com.facebook.login.LoginManager;
import com.facebook.login.LoginResult;
import com.facebook.login.widget.LoginButton;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.auth.AuthCredential;
import com.google.firebase.auth.AuthResult;
import com.google.firebase.auth.FacebookAuthProvider;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import android.support.annotation.NonNull;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.Arrays;
public class GetStartedActivity extends AppCompatActivity {
CallbackManager callbackManager;
AccessTokenTracker accessTokenTracker;
AccessToken accessToken;
private FirebaseAuth mAuth;
ProgressDialog progress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FacebookSdk.sdkInitialize(this.getApplicationContext());
setContentView(R.layout.activity_getstarted);
getSupportActionBar().hide();
mAuth = FirebaseAuth.getInstance();
callbackManager = CallbackManager.Factory.create();
final LoginButton loginButton = (LoginButton) findViewById(R.id.fb_login);
final ImageButton btnFBLogin = (ImageButton)findViewById(R.id.btn_fb_login);
loginButton.setReadPermissions("email", "public_profile");
if (loginButton != null) {
loginButton.registerCallback(callbackManager,
new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
// App code
loginButton.setVisibility(View.INVISIBLE);
btnFBLogin.setVisibility(View.VISIBLE);
accessToken = loginResult.getAccessToken();
FBLogin();
}
@Override
public void onCancel() {
// App code
}
@Override
public void onError(FacebookException exception) {
// App code
}
});
}
if(AccessToken.getCurrentAccessToken()!=null) {
accessToken = AccessToken.getCurrentAccessToken();
btnFBLogin.setVisibility(View.VISIBLE);
}
btnFBLogin.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
FBLogin();
}
});
}
private void FBLogin(){
progress = new ProgressDialog(GetStartedActivity.this);
progress.setMessage("Please Wait...");
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.setCancelable(false);
progress.show();
AuthCredential credential = FacebookAuthProvider.getCredential(accessToken.getToken());
mAuth.signInWithCredential(credential)
.addOnCompleteListener(GetStartedActivity.this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
if (task.isSuccessful()) {
GraphRequest request = GraphRequest.newMeRequest(accessToken, new GraphRequest.GraphJSONObjectCallback(){
@Override
public void onCompleted(JSONObject object, GraphResponse response) {
progress.hide();
progress.dismiss();
try {
Globals.email_address = object.getString("email");
Globals.first_name = object.getString("first_name");
Globals.last_name = object.getString("last_name");
} catch (JSONException e) {
e.printStackTrace();
}
Intent intent = new Intent(GetStartedActivity.this, WelcomeActivity.class);
startActivity(intent);
finish();
}
});
Bundle parameters = new Bundle();
parameters.putString("fields","id,email,first_name,last_name");
request.setParameters(parameters);
request.executeAsync();
// Sign in success, update UI with the signed-in user's information
} else {
progress.hide();
progress.dismiss();
// If sign in fails, display a message to the user.
// Log.w(TAG, "signInWithCredential:failure", task.getException());
// Toast.makeText(FacebookLoginActivity.this, "Authentication failed.",
// Toast.LENGTH_SHORT).show();
// updateUI(null);
}
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
callbackManager.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onDestroy() {
super.onDestroy();
}
}
回答5:
@Muhammad Rayhan. I also did the same. I used FirebaseUser.updateEmail() after I got the email from Fb GraphRequest. It worked without issues.
回答6:
I had this same problem. It was caused by creating the Facebook login without any read permissions, tested the login, all OK - then added the read permissions for email.
Facebook showed the updated permissions dialog, but Firebase didn't grab the new email.
I had to delete the user in Firebase console. Ran the app again, logged in, and email now shows.
回答7:
I solved this way
_facebookLoginButton.setReadPermissions(Arrays.asList(
"email", "public_profile"));
_facebookLoginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
credential = FacebookAuthProvider.getCredential(facebookAccessToken.getToken());
GraphRequest request = GraphRequest.newMeRequest(
loginResult.getAccessToken(), (me, response) -> {
if (response.getError() != null) {
// handle error
hideProgress();
Logcum.w(" GirisActivity ", "facebookSignIn: Giriş anında hata oluştu", response.getError().getException());
} else {
user_email = response.getJSONObject().optString("email");
facebookSignInCredential(user_email);
}
});
Bundle parameters = new Bundle();
parameters.putString("fields", "email");
request.setParameters(parameters);
request.executeAsync();
}
@Override
public void onCancel() {
Log.d(TAG, "facebook:onCancel");
hideProgress(); // progresi gizle
}
@Override
public void onError(FacebookException error) {
Log.d(TAG, "facebook:onError", error);
hideProgress(); // progresi gizle
}
});
回答8:
Don't know it this is still the issue today, but I had a similar problem in flutter when setting "Allow creation of multiple accounts with the same email address", my firestore user was returning email null, but I found the email address in the user.providerData
回答9:
This worked for me.
There is something called providerData in the FirebaseUser. It consists of two data, one from Firebase and another from your sign-in provider (Google, Facebook etc).
I am able to get the email from the second providerData.
来源：https://stackoverflow.com/questions/37522582/empty-email-field-of-firebase-auth-user-using-facebook-login-integration-fireba