有没有办法从Firebase数据库身份验证和Firebase数据库UID中删除匿名用户?

问题描述 投票:0回答:1

目前发生的情况:当用户使用onBackPressedcase R.id.logoutMenuOption以匿名用户身份注销时,他们的Firebase Auth和Firebase数据库Uid会被正确删除。但是,当用户滑动关闭应用程序时,会调用onDestroy()方法,但其Firebase Auth和Firebase数据库Uid仍保留在数据库中。当用户滑动关闭应用程序时,我使用onDestroy()

我需要做什么:当用户滑动关闭应用程序时,调用onDestroy()removeAnonymousVendorUser()方法从实时数据库中删除匿名用户身份验证以及他们的用户Uid。

到目前为止我做了什么:我创建了removeAnonymousVendorUser()方法并将其放在onDestroy()方法中。我还将展示如何在我的其他注销方法中使用它,并且在那些方法中它确实有效,它对onDestroy()不起作用

  @Override
protected void onDestroy() {
    super.onDestroy();
    //TODO: Figure out how to delete UID and user when they sign out
    removeAnonymousVendorUser();
    FirebaseAuth.getInstance().signOut();
    finish();
}

删除匿名用户Firebase Auth数据和Firebase数据库数据的方法:

  private void removeAnonymousVendorUser() {

    if (FirebaseAuth.getInstance().getCurrentUser() != null) {

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

        user.delete();
    }

    DatabaseReference vendorIdReference = FirebaseDatabase.getInstance().getReference("Vendor");
    vendorIdReference.removeValue();

}

用户单击“注销”菜单选项按钮时的注销方法:

           //Logout Menu Option Button
              @Override
            public boolean onOptionsItemSelected(MenuItem item) {
            switch (item.getItemId()) {

             // If Logout Button is clicked within 2 Seconds log user out
            case R.id.logoutMenuOption:
            if (logoutAppPressAgain + 2000 > System.currentTimeMillis()) {
                logoutToast.cancel();

                removeAnonymousVendorUser();
                FirebaseAuth.getInstance().signOut();
                removeAnonymousVendorUser();
                Intent logoutIntent = new Intent(VendorMapsActivity.this, WelcomeActivity.class);
                startActivity(logoutIntent);
                finish();
            } else {
                logoutToast = Toast.makeText(getBaseContext(), R.string.press_button_again_to_logout, Toast.LENGTH_SHORT);
                logoutToast.show();
            }

            logoutAppPressAgain = System.currentTimeMillis();
    }

    return super.onOptionsItemSelected(item);
     }

用户按两次后退出方法:

        public void onBackPressed() {
    if (exitAppPressBack + 2000 > System.currentTimeMillis()) {
        exitAppBackToast.cancel();
        super.onBackPressed();

        removeAnonymousVendorUser();
        FirebaseAuth.getInstance().signOut();
        Intent logoutIntent = new Intent(VendorMapsActivity.this, 
        WelcomeActivity.class);
        startActivity(logoutIntent);
        finish();
        } else {
        exitAppBackToast = Toast.makeText(getBaseContext(), 
        R.string.press_back_one_more_time_to_exit, Toast.LENGTH_SHORT);
        exitAppBackToast.show();
        }

    exitAppPressBack = System.currentTimeMillis();
}

这是匿名登录时创建用户的代码:

     public void sellAnonymously(View view) {

    circProgressBar.setVisibility(View.VISIBLE);

    firebaseAuth.signInAnonymously().addOnSuccessListener(VendorLoginActivity.this, new OnSuccessListener<AuthResult>() {
        @Override
        public void onSuccess(AuthResult authResult) {

            Toast.makeText(VendorLoginActivity.this, "Success!  Enjoy the app!", Toast.LENGTH_LONG).show();
            String client_id = firebaseAuth.getCurrentUser().getUid();
            DatabaseReference client_db = FirebaseDatabase.getInstance().getReference().child("Vendor").child(client_id);
            client_db.setValue(true);
            circProgressBar.setVisibility(View.INVISIBLE);

            // Sends anonymous user to VendorMapsActivity
            startActivity(new Intent(VendorLoginActivity.this, VendorMapsActivity.class));

        }
    });
}
android firebase firebase-realtime-database firebase-authentication
1个回答
1
投票

要删除用户,请按照user.delete()上Firebase文档中的说明调用deleting a user

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

user.delete()

要从当前用户的数据库中删除数据,请在removeValue()上的Firebase文档中显示的对该数据的引用上调用deleting data

ref.removeValue()

您可以使用Cloud Functions for Firebase将两者结合使用。在这种情况下,您通过从数据库中删除其数据来响应被删除的用户。有关此内容的简短说明,请参阅triggering Cloud Functions when a user is deleted上的Firebase文档:

exports.deleteUserData = functions.auth.user().onDelete((user) => {
  // ...
})
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