据我所知,从Firebase Docs,如果用户使用凭证验证他的帐户,如果凭证尚未与另一个凭证链接,则应使用相同的凭证严格登录。
换句话说,如果我使用Google登录创建帐户,然后(退出后)尝试使用与Google凭据相同的电子邮件登录Facebook凭据,我应该在logcat中看到此异常:
“已存在具有相同电子邮件地址但登录凭据不同的帐户。请使用与此电子邮件地址关联的提供商登录。”
是的,我毫不奇怪地得到了这个例外。但是,如果我使用Facebook创建帐户,然后尝试使用Google凭据登录,则此帐户(Facebook)的提供商将转换为Google。此时身份验证不会失败,但不是预期的结果。我希望以某种方式将每个用户与特定凭据相关联。我该怎么解决这个问题?你可以看到下面的代码:
public class SignInActivity extends AppCompatActivity implements GoogleApiClient.OnConnectionFailedListener,
View.OnClickListener {
private static final String TAG = "SignInActivity";
private static final int RC_SIGN_IN = 9001;
private GoogleApiClient mGoogleApiClient;
private FirebaseAuth mFirebaseAuth;
private FirebaseAuth.AuthStateListener mFirebaseAuthListener;
private CallbackManager mCallbackManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_sign_in);
// Facebook Login
FacebookSdk.sdkInitialize(getApplicationContext());
mCallbackManager = CallbackManager.Factory.create();
LoginButton mFacebookSignInButton = (LoginButton) findViewById(R.id.facebook_login_button);
mFacebookSignInButton.setReadPermissions("email", "public_profile");
mFacebookSignInButton.registerCallback(mCallbackManager, new FacebookCallback<LoginResult>() {
@Override
public void onSuccess(LoginResult loginResult) {
Log.d(TAG, "facebook:onSuccess:" + loginResult);
firebaseAuthWithFacebook(loginResult.getAccessToken());
}
@Override
public void onCancel() {
Log.d(TAG, "facebook:onCancel");
}
@Override
public void onError(FacebookException error) {
Log.d(TAG, "facebook:onError", error);
}
});
// Google Sign-In
// Assign fields
SignInButton mGoogleSignInButton = (SignInButton) findViewById(R.id.google_sign_in_button);
// Set click listeners
mGoogleSignInButton.setOnClickListener(this);
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
.requestIdToken(getString(R.string.default_web_client_id))
.requestEmail()
.build();
mGoogleApiClient = new GoogleApiClient.Builder(this)
.enableAutoManage(this /* FragmentActivity */, this /* OnConnectionFailedListener */)
.addApi(Auth.GOOGLE_SIGN_IN_API, gso)
.build();
// Initialize FirebaseAuth
mFirebaseAuth = FirebaseAuth.getInstance();
mFirebaseAuthListener = new FirebaseAuth.AuthStateListener() {
@Override
public void onAuthStateChanged(@NonNull FirebaseAuth 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");
}
}
};
}
@Override
public void onStart() {
super.onStart();
mFirebaseAuth.addAuthStateListener(mFirebaseAuthListener);
}
@Override
public void onStop() {
super.onStop();
if (mFirebaseAuthListener != null) {
mFirebaseAuth.removeAuthStateListener(mFirebaseAuthListener);
}
}
private void firebaseAuthWithGoogle(GoogleSignInAccount acct) {
Log.d(TAG, "firebaseAuthWithGooogle:" + acct.getId());
AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
mFirebaseAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.d(TAG, "signInWithCredential:onComplete:" + task.isSuccessful());
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Log.w(TAG, "signInWithCredential", task.getException());
Toast.makeText(SignInActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
} else {
startActivity(new Intent(SignInActivity.this, MainActivity.class));
finish();
}
}
});
}
private void firebaseAuthWithFacebook(AccessToken token) {
Log.d(TAG, "handleFacebookAccessToken:" + token);
final AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
mFirebaseAuth.signInWithCredential(credential)
.addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
@Override
public void onComplete(@NonNull Task<AuthResult> task) {
Log.d(TAG, "signInWithCredential:onComplete:" + task.isSuccessful());
// If sign in fails, display a message to the user. If sign in succeeds
// the auth state listener will be notified and logic to handle the
// signed in user can be handled in the listener.
if (!task.isSuccessful()) {
Log.w(TAG, "signInWithCredential", task.getException());
Toast.makeText(SignInActivity.this, "Authentication failed.",
Toast.LENGTH_SHORT).show();
}
else {
startActivity(new Intent(SignInActivity.this, MainActivity.class));
finish();
}
}
});
}
/*
private void handleFirebaseAuthResult(AuthResult authResult) {
if (authResult != null) {
// Welcome the user
FirebaseUser user = authResult.getUser();
Toast.makeText(this, "Welcome " + user.getEmail(), Toast.LENGTH_SHORT).show();
// Go back to the main activity
startActivity(new Intent(this, MainActivity.class));
}
}
*/
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.google_sign_in_button:
signIn();
break;
default:
return;
}
}
private void signIn() {
Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient);
startActivityForResult(signInIntent, RC_SIGN_IN);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
mCallbackManager.onActivityResult(requestCode, resultCode, data);
// Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
if (requestCode == RC_SIGN_IN) {
GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
if (result.isSuccess()) {
// Google Sign In was successful, authenticate with Firebase
GoogleSignInAccount account = result.getSignInAccount();
firebaseAuthWithGoogle(account);
} else {
// Google Sign In failed
Log.e(TAG, "Google Sign In failed.");
}
}
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
// An unresolvable error has occurred and Google APIs (including Sign-In) will not
// be available.
Log.d(TAG, "onConnectionFailed:" + connectionResult);
Toast.makeText(this, "Google Play Services error.", Toast.LENGTH_SHORT).show();
}
}
请检查线程:https://groups.google.com/forum/#!searchin/firebase-talk/liu/firebase-talk/ms_NVQem_Cw/8g7BFk1IAAAJ它解释了为什么会发生这种情况。这是由于某些安全问题导致Google电子邮件被验证,而Facebook电子邮件却没有。
您正在寻找允许使用相同电子邮件地址创建多个帐户。
为了最大限度地减少登录UI点击而不影响帐户安全性,Firebase身份验证具有“可信提供商”的概念,其中身份提供商也是电子邮件服务提供商。例如,Google是@ gmail.com地址的可信赖提供商,Yahoo是@ yahoo.com地址的可靠提供商,Microsoft是@look.com地址的可信提供商。
在“每个电子邮件地址一个帐户”模式下,Firebase身份验证会尝试根据电子邮件地址关联帐户。如果用户从可信提供商登录,则用户立即登录该帐户,因为我们知道该用户拥有该电子邮件地址。
如果现有帐户具有相同的电子邮件地址但使用不受信任的凭据(例如,不受信任的提供商或密码)创建,则出于安全原因,将删除先前的凭据。网络钓鱼者(不是电子邮件地址所有者)可能会创建初始帐户 - 删除初始凭据会阻止网络钓鱼者随后访问该帐户。
jin l IU
您正在寻找允许使用相同电子邮件地址创建多个帐户。
只有在您检查后端的电子邮件时,这才能正常工作,这是您的用户的参考。如果您使用Firebase ID,则无法保留唯一身份用户。
我遇到了同样的问题,您只需转到Firebase控制台,然后在“身份验证”类别中删除您想要的用户。
这对我有用。