Android-如何将 Firebase Uid 保存到 SharedPreferences？

Question

在让用户登录并获得他们的 uid 后，我如何将他们的 uid 保存到 SharedPreferences 以便我可以在我的整个项目中访问它？这是我获取他们的 uid 的代码:

FirebaseAuth auth = FirebaseAuth.getInstance();
FirebaseAuth.AuthStateListener authListener = new FirebaseAuth.AuthStateListener() {
    @Override
    public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
        FirebaseUser firebaseUser = firebaseAuth.getCurrentUser();
        if (firebaseUser != null) {
            String userId = firebaseUser.getUid();
            String userEmail = firebaseUser.getEmail();
        } 
    }
};

Answer 1

像这样尝试:

private SharedPreferences sharedPref;
FirebaseAuth auth = FirebaseAuth.getInstance();
FirebaseAuth.AuthStateListener authListener = new FirebaseAuth.AuthStateListener() {
    @Override
    public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
        FirebaseUser firebaseUser = firebaseAuth.getCurrentUser();
        if (firebaseUser != null) {
            String userId = firebaseUser.getUid();
            String userEmail = firebaseUser.getEmail();
            sharedPref = getPreferences(MODE_PRIVATE);
            SharedPreferences.Editor editor = sharedPref.edit();
            editor.putString("firebasekey", userId);
            editor.commit();
        } 
    }
};

在其他 Activity 中检索:

        sharedPref = getPreferences(MODE_PRIVATE);
        String UserId = sharedPref.getString("firebasekey", "");