如何在Android模块中使用FirebaseAuth [英] How to work with FirebaseAuth inside Android Module

问题描述

我正在开发一个聊天库，在其中我想显示登录的用户的谈话。做图书馆的原因是我想把它整合到多个项目中。

我现在面对的问题是 FirebaseAuth 表示用户没有登录（ FirebaseAuth.getInstance（mFirebaseApp）.getCurrentUser（）总是返回 null ），即使用户在应用程序内进行了身份验证。 / p>

模块/库如何知道用户是否已通过身份验证？

我正在尝试以下代码： / p>

  mAPIKey = getArguments（）。getString（ConversationModuleConstants.API_KEY_KEY）; 
 mApplicatoinId = getArguments（）。getString（ConversationModuleConstants.APPLICATION_ID_KEY）; 
 mDatabaseUrl = getArguments（）。getString（ConversationModuleConstants.DATABASE_URL_KEY）; 
 
 FirebaseOptions options = new FirebaseOptions.Builder（）
 .setApiKey（mAPIKey）
 .setApplicationId（mApplicatoinId）
 .setDatabaseUrl（mDatabaseUrl）
 .build （）; 
 
 boolean hasBeenInitialized = false; 
列出< FirebaseApp> firebaseApps = FirebaseApp.getApps（getActivity（））; （FirebaseApp app：firebaseApps）{
 if（app.getName（）。equals（FIREBASE_APP_NAME））{
 hasBeenInitialized = true; 
 mFirebaseApp = app; $！
 
 
 $ if（！hasBeenInitialized）{
 mFirebaseApp = FirebaseApp.initializeApp（getActivity（），options，FIREBASE_APP_NAME）; （FirebaseAuth.getInstance（mFirebaseApp）.getCurrentUser（）== null）{
 Toast.makeText（getActivity（），需要登录！，Toast。 LENGTH_SHORT）.show（）; 
 return; 
 
  

解决方案

您需要添加一个侦听器/ Observer获取每个auth状态变化的用户标识。

  FirebaseAuth.getInstance（）。addAuthStateListener（firebaseAuth  - > {
 if（firebaseAuth.getCurrentUser（）== null）{
 your code goes here 
} 
}）; 
  

https://firebase.google.com/docs/auth/android/manage-users

另一种方法wkile登录获取用户ID并存储在LocalStorage中，而注销清除localstorage，这样你也可以保持在离线状态。

I am developing a Chat library in which I want to show the conversations of the logged in user. The reason to make the library is that I want to integrate it in multiple projects.

The problem I am facing right now is that FirebaseAuth is indicating that the user is not logged-in (FirebaseAuth.getInstance(mFirebaseApp).getCurrentUser() always returning null) even if the user is authenticated inside the app.

How the Module/Library can know that the user is authenticated?

I am trying the following code:

mAPIKey = getArguments().getString(ConversationModuleConstants.API_KEY_KEY);
        mApplicatoinId = getArguments().getString(ConversationModuleConstants.APPLICATION_ID_KEY);
        mDatabaseUrl = getArguments().getString(ConversationModuleConstants.DATABASE_URL_KEY);

        FirebaseOptions options = new FirebaseOptions.Builder()
                .setApiKey(mAPIKey)
                .setApplicationId(mApplicatoinId)
                .setDatabaseUrl(mDatabaseUrl)
                .build();

        boolean hasBeenInitialized = false;
        List<FirebaseApp> firebaseApps = FirebaseApp.getApps(getActivity());
        for (FirebaseApp app : firebaseApps) {
            if (app.getName().equals(FIREBASE_APP_NAME)) {
                hasBeenInitialized = true;
                mFirebaseApp = app;
            }
        }

        if (!hasBeenInitialized) {
            mFirebaseApp = FirebaseApp.initializeApp(getActivity(), options, FIREBASE_APP_NAME);
        }

 if (FirebaseAuth.getInstance(mFirebaseApp).getCurrentUser() == null) {
            Toast.makeText(getActivity(), "Login Required!", Toast.LENGTH_SHORT).show();
            return;
        }

解决方案

You need to add a listener/Observer to get the userid for every auth state change.

FirebaseAuth.getInstance().addAuthStateListener(firebaseAuth -> {
            if (firebaseAuth.getCurrentUser() == null) {
                your code goes here
            }
        });

https://firebase.google.com/docs/auth/android/manage-users

Another method wkile login get the user id and store in LocalStorage, while logout clear the localstorage, so that you will be able to maintain in offline too.

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