android - FireBaseUI Auth - 如何知道帐户是来自新注册还是现有用户？

Question

我正在使用firebaseUI for authentication 。它本质上是打开一个外部 Activity 并将用户登录到 firebase 并在 onActivityResult 中向开发人员发送回调。它工作得很好，问题是我需要知道用户是新注册用户还是现有用户。是否有任何类型的元数据或我可以用来了解这一点的东西？这是我迄今为止在 JAVA ANDROID 中所拥有的:

    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);
                   }
               });

   }

然后得到结果:

    @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

            }
        }
    }
}

我看到一个 meta class这也许可以帮助我，但我不知道如何使用它。

gradle:实现“com.firebaseui:firebase-ui-auth:3.2.2”

Answer 1

不要使用创建和登录时间戳进行比较。我发现它不可靠。

IdpResponse 有一个 isNewUser() 方法来告诉您登录是否是新帐户。