firebase.auth.FirebaseUser.linkWithCredential抛出空指针异常

问题描述 投票:0回答:1

我应该如何将现有的用户帐户与其他提供商但邮件相同?例如Google与Facebook。

public void handleFacebookAccessToken(final AccessToken token, final Activity activity) {
        Log.d(TAG, "handleFacebookAccessToken: " + token);

        final AuthCredential credential = FacebookAuthProvider.getCredential(token.getToken());
        mAuth.signInWithCredential(credential)
                .addOnCompleteListener(activity, new OnCompleteListener<AuthResult>() {

                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        if (task.isSuccessful()) {
                            // Sign in success, update UI with the signed-in user's information
                            Log.d(TAG, "signInWithCredential:success");
                            FirebaseUser user = mAuth.getCurrentUser();
                            authListener.updateSignedUI(user);
                        }
                    }
                }).addOnFailureListener(activity, new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "signInWithCredential:failure", e);
                if (e instanceof FirebaseAuthUserCollisionException) {
                    handleLinkingFacebookUsers(credential, activity);
                }
            }
        });
    }

在此下面的方法中,与'mAuth.getCurrentUser()。linkWithCredential()]对齐”>发生NullPointerException。

    private void handleLinkingFacebookUsers(AuthCredential savedFBCredential, Activity activity) {
        //AuthCredential credentialFacebook = FacebookAuthProvider.getCredential(token.getToken());
        //AuthCredential credentialGoogle = GoogleAuthProvider.getCredential(googleIdToken, null);
           mAuth.getCurrentUser()
                   .linkWithCredential(savedFBCredential)   // THIS LINE TROWS NULL POINTER EXCEPTION
                   .addOnCompleteListener(activity, new OnCompleteListener<AuthResult>() {
                       @Override
                       public void onComplete(@NonNull Task<AuthResult> task) {
                           if (task.isSuccessful()) {
                               Log.d(TAG, "linkWithCredential:success");
                               FirebaseUser user = task.getResult().getUser();
                               authListener.updateSignedUI(user);
                           } else {
                               Log.w(TAG, "linkWithCredential:failure", task.getException());
                               authListener.updateSignedUI(null);
                           }

                           // ...
                       }
                   });

    }

Logcat:

com.google.firebase.auth.FirebaseAuthUserCollisionException: An account already exists with the same email address but different sign-in credentials. Sign in using a provider associated with this email address.
        at com.google.firebase.auth.api.internal.zzdv.zza(com.google.firebase:firebase-auth@@19.2.0:42)
        at com.google.firebase.auth.api.internal.zzfc.zza(com.google.firebase:firebase-auth@@19.2.0:19)
        at com.google.firebase.auth.api.internal.zzes.zza(com.google.firebase:firebase-auth@@19.2.0:34)
        at com.google.firebase.auth.api.internal.zzeu.zza(com.google.firebase:firebase-auth@@19.2.0:98)
        at com.google.firebase.auth.api.internal.zzeu.zza(com.google.firebase:firebase-auth@@19.2.0:85)

任何建议都值得赞赏。谢谢。

我应该如何将现有用户帐户与其他提供商和同一封电子邮件关联?例如Google与Facebook。 public void handleFacebookAccessToken(最终AccessToken令牌,最终活动...

java android firebase firebase-authentication
1个回答
0
投票

mAuth.getCurrentUser()返回一个空的FirebaseUser,因为在调用它时没有用户登录。您的代码应在调用FirebaseUser对象上的方法之前进行检查,如getCurrentUser()的API文档所示。

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