FireBaseUI Auth-如何知道帐户是来自新注册用户还是现有用户? [英] FireBaseUI Auth - how to know if account is from a new signup or existing user?

问题描述

我正在使用 firebaseUI进行身份验证.实际上，它会打开一个外部活动，然后将用户登录到Firebase，然后在onActivityResult中向开发人员发送回电.它的工作原理很好，问题是我需要知道用户是新注册用户还是现有用户.是否有任何一种元数据或我可以用来了解这一点的东西?这是我到目前为止在JAVA ANDROID中所拥有的:

I am using firebaseUI for authentication. it essentially opens a a external activity and logs the user into firebase and sends the developer a call back in onActivityResult. It works great the problem is i need to know if the user is a new signup or an existing user. is there any kind of metadata or something i can use to know this ? here is what i have so far IN JAVA ANDROID:

    private void ititFireBaseUi() {

       AuthUI.getInstance()
               .signOut(getActivity())
               .addOnCompleteListener(new OnCompleteListener<Void>() {
                   public void onComplete(@NonNull Task<Void> task) {
                       // Choose authentication providers
                       List<AuthUI.IdpConfig> providers = Arrays.asList(
                               new AuthUI.IdpConfig.Builder(AuthUI.EMAIL_PROVIDER).build(),
                               new AuthUI.IdpConfig.Builder(AuthUI.PHONE_VERIFICATION_PROVIDER).build(),
                               new AuthUI.IdpConfig.Builder(AuthUI.GOOGLE_PROVIDER).build(),
                               new AuthUI.IdpConfig.Builder(AuthUI.FACEBOOK_PROVIDER).build());
                       //new AuthUI.IdpConfig.Builder(AuthUI.TWITTER_PROVIDER).build());

// Create and launch sign-in intent
                       startActivityForResult(
                               AuthUI.getInstance()
                                       .createSignInIntentBuilder()
                                       .setAvailableProviders(providers)
                                       .setLogo(R.drawable.logo)
                                       .build(),
                               RC_SIGN_IN);
                   }
               });

   }

，然后显示结果:

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == RC_SIGN_IN) {
            IdpResponse response = IdpResponse.fromResultIntent(data);
//I WOULD LIKE TO KNOW HERE IF THE USER IS A NEW USER OR EXISTING USER
            String msg = "";
            if (resultCode == RESULT_OK) {
                // Successfully signed in
                FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
                msg = "generating token with email:" + user.getEmail();

                Timber.d(msg);
                Toast.makeText(getActivity(), msg, Toast.LENGTH_LONG).show();

                presenter.generateTokenWithFireBase(user);
                // ...
            } else {
                // Sign in failed, check response for error code

            }
        }
    }
}

我看到了元类那也许可以帮助我，但我不知道如何使用它.

I see a meta class that maybe can help me but i dont know how to use it.

gradle:实现'com.firebaseui:firebase-ui-auth:3.2.2'

gradle : implementation 'com.firebaseui:firebase-ui-auth:3.2.2'

推荐答案

请勿使用创建和登录时间戳比较.我发现它不可靠.

Do not use the creation and sign in timestamp comparison. I found it to be unreliable.

IdpResponse 具有 isNewUser()方法，用于告诉您登录名是否是新帐户.

IdpResponse has a isNewUser() method to tell you whether the login is a new account or not.

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