我使用Firebase Auth和Firestore登录屏幕，并将Firestore和Firebase Auth链接到同一个电子邮件。我希望当我登录或注册到应用程序的电子邮件，它必须传递到其他活动的片段，如果它将是成功的，我可以访问Firestore。我尝试了捆绑包和SafeArgs，但它总是给予我空。我不能解决这个恼人的问题。我将离开我的代码。

登录活动.kt

private val db = Firebase.firestore.collection("users")
private val auth = Firebase.auth
private lateinit var binding: ActivityLoginBinding

private fun loginUser(email: String, password: String) {
        if (email.isNotEmpty() && password.isNotEmpty()) {
            CoroutineScope(Dispatchers.IO).launch {
                try {
                    auth.signInWithEmailAndPassword(email, password)
                        .addOnSuccessListener {
                            val fragment = MainFragment()
                            val bundle = Bundle()
                            bundle.putString("mail", email)
                            fragment.arguments = bundle
                            checkLogged()
                            Toast.makeText(this@LoginActivity, "Welcome Again", Toast.LENGTH_SHORT)
                                .show()
                        }
                        .addOnFailureListener {
                            Toast.makeText(this@LoginActivity, it.message, Toast.LENGTH_LONG).show()
                        }.await()
                } catch (e: Exception) {
                    withContext(Dispatchers.Main) {
                        Toast.makeText(this@LoginActivity, e.message, Toast.LENGTH_LONG).show()
                    }
                }
            }
        }
    }

    private fun registerUser(email: String, password: String, user: User) {
        if (email.isNotEmpty() && password.isNotEmpty()) {
            CoroutineScope(Dispatchers.IO).launch {
                try {
                    auth.createUserWithEmailAndPassword(email, password)
                        .addOnSuccessListener {
                            db.document(user.email).set(user)
                            val fragment = MainFragment()
                            val bundle = Bundle()
                            bundle.putString("email", user.email)
                            fragment.arguments = bundle
                            checkLogged()
                            Toast.makeText(
                                this@LoginActivity,
                                "Welcome ${user.name}",
                                Toast.LENGTH_SHORT
                            ).show()
                        }.await()
                } catch (e: java.lang.Exception) {
                    withContext(Dispatchers.Main) {
                        Toast.makeText(this@LoginActivity, e.message, Toast.LENGTH_LONG).show()
                    }
                }
            }
        }
    }

    private fun checkLogged() {
        if (Firebase.auth.currentUser != null) {
            Firebase.auth.currentUser!!.reload()
            startActivity(Intent(this@LoginActivity, MainActivity::class.java))
            finish()
        } else {
            //
        }
    }

主要片段.kt

class MainFragment : Fragment() {

private val db = Firebase.firestore.collection("users")
private lateinit var binding: FragmentMainBinding

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View {
    binding = FragmentMainBinding.inflate(inflater, container, false)
    if (arguments != null){
        val textName = arguments?.getString("email")
        binding.txtName.text = textName
    }
    return binding.root
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)

}

导航图形.xml

<?xml version="1.0" encoding="utf-8"?>
<navigation xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/nav_graph"
    app:startDestination="@id/mainFragment">
    <fragment
        android:id="@+id/addMealFragment"
        android:name="com.meetozan.caloriecounter.AddMealFragment"
        android:label="fragment_add_meal"
        tools:layout="@layout/fragment_add_meal" />
    <fragment
        android:id="@+id/calendarFragment"
        android:name="com.meetozan.caloriecounter.CalendarFragment"
        android:label="fragment_calendar"
        tools:layout="@layout/fragment_calendar" />
    <fragment
        android:id="@+id/foodsFragment"
        android:name="com.meetozan.caloriecounter.FoodsFragment"
        android:label="fragment_foods"
        tools:layout="@layout/fragment_foods" />
    <fragment
        android:id="@+id/leaderboardFragment"
        android:name="com.meetozan.caloriecounter.LeaderboardFragment"
        android:label="fragment_leaderboard"
        tools:layout="@layout/fragment_leaderboard" />
    <fragment
        android:id="@+id/mainFragment"
        android:name="com.meetozan.caloriecounter.MainFragment"
        android:label="fragment_main"
        tools:layout="@layout/fragment_main">
        <action
            android:id="@+id/action_mainFragment_to_addMealFragment"
            app:destination="@id/addMealFragment" />
        <action
            android:id="@+id/action_mainFragment_to_calendarFragment"
            app:destination="@id/calendarFragment" />
        <action
            android:id="@+id/action_mainFragment_to_foodsFragment"
            app:destination="@id/foodsFragment" />
        <action
            android:id="@+id/action_mainFragment_to_leaderboardFragment"
            app:destination="@id/leaderboardFragment" />
        <argument
            android:name="email"
            app:argType="string"
            app:nullable="true" />
    </fragment>
    <activity
        android:id="@+id/loginActivity"
        android:name="com.meetozan.caloriecounter.LoginActivity"
        android:label="activity_login"
        tools:layout="@layout/activity_login" />
</navigation>