Android- 如何将 Firebase Uid 保存到 SharedPreferences？

Question

让用户登录并获取他们的 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

这样试试

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();
        } 
    }
};

Answer 2

使用此代码将您的 UID 保存到 sharedpreference。

// for saving uid for shared preference



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();
            SharedPreferences sp = getSharedPreferences(PREFS_UID ,Context.MODE_PRIVATE);
            sp.edit().putInt(Save_UID,userId ).commit();
        } 
    }
};


// Retrieving id to any activity by calling this

SharedPreferences sp = getSharedPreferences(PREFS_UID,Context.MODE_PRIVATE);
int sc  = sp.getInt(Save_UID,0);

Answer 3

这样试试：

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", "");

Android- 如何将 Firebase Uid 保存到 SharedPreferences？

Android- How to save Firebase Uid onto SharedPreferences?

android

firebase

firebase-authentication

android-sharedpreferences