如何从 Android 应用中删除 Firebase 用户? [英] How to delete a Firebase user from Android App?

问题描述

我正在尝试在我的 Android 应用程序中编写一个 Delete User 方法，但是我每次执行它时都会遇到一些问题.当用户按下活动上的删除帐户按钮时，将执行此方法.我的应用支持 FirebaseUI 身份验证.

I'm trying to code a Delete User method in my Android App, but I have some issues each time I execute it. This method will be executed when a user pushes the Delete account button on an Activity. My apps works with FirebaseUI Auth.

方法如下:

private void deleteAccount() {
    Log.d(TAG, "ingreso a deleteAccount");
    FirebaseAuth firebaseAuth = FirebaseAuth.getInstance();
    final FirebaseUser currentUser = firebaseAuth.getCurrentUser();

    currentUser.delete().addOnCompleteListener(new OnCompleteListener<Void>() {
        @Override
        public void onComplete(@NonNull Task<Void> task) {
            if (task.isSuccessful()) {
                Log.d(TAG,"OK! Works fine!");
                startActivity(new Intent(Main3WelcomeActivity.this, Main3Activity.class));
                finish();
            } 
        }
    }).addOnFailureListener(new OnFailureListener() {
        @Override
        public void onFailure(@NonNull Exception e) {
            Log.e(TAG,"Ocurrio un error durante la eliminación del usuario", e);
        }
    });
}

1) 当我执行该功能时，屏幕上会出现一条 Smart Lock 消息，用户再次登录.这是此消息的屏幕截图.

1) When I execute that function a Smart Lock message appears on the screen and the user is signed in again. Here is a screenshot of this message.

2) 其他情况下，当用户长时间登录时，函数会抛出这样的异常:

2) On other occasions, when the user is logged in for a long time, the function throws an Exception like this:

06-30 00:01:26.672 11152-11152/com.devpicon.android.firebasesamples E/Main3WelcomeActivity: Ocurrio un error durante la eliminación del usuario
com.google.firebase.FirebaseException: An internal error has occured. [ CREDENTIAL_TOO_OLD_LOGIN_AGAIN ]
at com.google.android.gms.internal.zzacq.zzbN(Unknown Source)
at com.google.android.gms.internal.zzacn$zzg.zza(Unknown Source)
at com.google.android.gms.internal.zzacy.zzbO(Unknown Source)
at com.google.android.gms.internal.zzacy$zza.onFailure(Unknown Source)
at com.google.android.gms.internal.zzact$zza.onTransact(Unknown Source)
at android.os.Binder.execTransact(Binder.java:453)

我读过我必须重新进行身份验证 用户，但我不确定在使用 Google 登录时如何执行此操作.

I've read that I have to re-authenticate the user but I'm not sure how to do this when I'm working with Google Sign In.

推荐答案

根据 Firebase 文档可以使用 delete() 方法从 中删除用户Firebase

As per the Firebase documentation can user delete() method to remove user from the Firebase

在删除用户之前，请重新验证用户.

Before remove the user please reAuthenticate the user.

示例代码

     final FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();

        // Get auth credentials from the user for re-authentication. The example below shows
        // email and password credentials but there are multiple possible providers,
        // such as GoogleAuthProvider or FacebookAuthProvider.
        AuthCredential credential = EmailAuthProvider
                .getCredential("[e-mail]", "password1234");

        // Prompt the user to re-provide their sign-in credentials
        user.reauthenticate(credential)
                .addOnCompleteListener(new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
           user.delete()
            .addOnCompleteListener(new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    if (task.isSuccessful()) {
                        Log.d(TAG, "User account deleted.");
                    }
                }
            });

   }
});

欲知更多详情:https://firebase.google.com/docs/auth/android/manage-users#re-authenticate_a_user

如果您想与其他 singin provider 进行用户重新身份验证，只需更改 Provider for GoogleAuthProvider 下面是示例代码

If you want to user re Authentication with other singin provider only need to change the Provider for GoogleAuthProvider below is the sample code

GoogleAuthProvider.getCredential(googleIdToken,null);

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