如何使用Google Provider重新验证Firebase上的用户? [英] How to re-authenticate a user on Firebase with Google Provider?

问题描述

示例，用于在Firebase仅显示如何重新认证使用电子邮件和密码签名的用户:

The example for using reauthenticate() in Firebase shows only how to re-authenticate a user who signed with Email and Password:

AuthCredential credential = EmailAuthProvider.getCredential("[e-mail]", "password1234");
FirebaseAuth.getInstance().getCurrentUser().reauthenticate(credential);

我还知道如何与Facebook Provider(credential = FacebookAuthProvider.getCredential(AccessToken.getCurrentAccessToken().toString()))重新进行身份验证.

I also know how to re-authenticate with Facebook Provider (credential = FacebookAuthProvider.getCredential(AccessToken.getCurrentAccessToken().toString())).

问题是Google API中没有等效的方法来获取当前的访问令牌并最终获取AuthCredential.那么在这种情况下我该如何传递给getCredential()?

Problem is there's no equivelant method in Google API to get the current Access Token and eventually get the AuthCredential. So what do I pass to getCredential() in this case?

推荐答案

我知道这是个老问题，但是我没有找到完整的答案.这是在Android上执行的操作.

I know this is old question but I did not found complete answer to this. This is how to do it on Android.

FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
// Get the account
GoogleSignInAccount acct = GoogleSignIn.getLastSignedInAccount(context);
if (acct != null) {
     AuthCredential credential = GoogleAuthProvider.getCredential(acct.getIdToken(), null);
     user.reauthenticate(credential).addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            if (task.isSuccessful()) {
                Log.d(TAG, "Reauthenticated.");
            }
        }
     });
} 

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