尝试从Firebase Auth和Google登出 [英] Trying to sign out from Firebase Auth and Google

问题描述

所以，我的问题是，当我从Firebase中注销时，按登录后无法再次弹出带有不同帐户的登录窗口

So, my problem is that when i log out from firebase i cant see the log in window with the different accounts pop up again after i press login

所以我发现我们需要从google api中注销，这是我的代码，但我遇到了错误

So i found that we need to logout from google api, here is my code how i do it but i get an error

这在我的按钮 onClick

 Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(new ResultCallback<Status>() {
                             @Override
                             public void onResult(@NonNull Status status) {
                                 FirebaseAuth.getInstance().signOut();
                                 finish();
                             }
                         });

我得到这个错误

'android.content.Contextcom.google.android.gms.common.api.GoogleApiClient.getContext()'空对象引用

'android.content.Context com.google.android.gms.common.api.GoogleApiClient.getContext()' on a null object reference

在此行

 Auth.GoogleSignInApi.signOut(mGoogleApiClient).......

知道发生了什么吗?

推荐答案

首先使用 mGoogleApiClient.connect(); ，然后只需检查 Auth.GoogleSignInApi 是否无效:

First use mGoogleApiClient.connect(); and then just check Auth.GoogleSignInApi for nullity:

if (Auth.GoogleSignInApi != null) {
    Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(new ResultCallback<Status>() {
         @Override
         public void onResult(@NonNull Status status) {
             FirebaseAuth.getInstance().signOut();
             finish();
         }
     });
}

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