заголовок элемента вкладки становится невидимым после изменения дизайна страницы

Question

после изменения моего дизайна (изменения относительных макетов на макет ограничений и фиксацию ограничений) мой табулатур все еще виден, но элементы табуляции, которые я добавил в java, стали невидимыми (они все еще видимы, но заголовок стал невидимым), как решить эту проблему

вот мой xml файл (я думаю, что пробел здесь, потому что я не изменил код java):

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"

android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Fragments.GroupeFragment">
<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/linearLayout"
    android:layout_width="match_parent"
    android:layout_height="60dp"
    android:background="#95210851"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.0"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:orientation="horizontal"
    android:weightSum="20"
    >

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:layout_marginStart="16dp"
        android:layout_weight="4"
        android:src="@drawable/notification_icon"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.8" />

    <TextView
        android:id="@+id/groupename"

        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="68dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="16dp"
        android:layout_weight="10"
        android:fontFamily="@font/renner_500_medium"
        android:text="Telnet groupe"
        android:textAlignment="center"
        android:textColor="#ffff"
        android:textFontWeight="8"
        android:textSize="23sp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toEndOf="@+id/imageView2"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/getallmembres"

        android:layout_width="0dp"
        android:layout_height="50dp"
        android:layout_marginStart="40dp"
        android:layout_marginTop="8dp"
        android:layout_marginBottom="2dp"
        android:layout_weight="4"
        android:elevation="3dp"
        android:src="@drawable/login_username_icon"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toEndOf="@+id/groupename"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/addtachebyresp"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_alignParentEnd="true"
        android:layout_alignParentBottom="true"
        android:layout_marginTop="8dp"
        android:layout_marginEnd="2dp"
        android:layout_marginBottom="8dp"
        android:layout_weight="4"
        android:background="@drawable/add_icon"
        android:elevation="3dp"
        android:textColor="#FFFF"
        android:textSize="45sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.258"
        app:layout_constraintStart_toEndOf="@+id/getallmembres"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

<androidx.viewpager.widget.ViewPager
    android:id="@+id/pager"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/linearLayout">

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tab_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="#95210851"
        android:elevation="6dp"
        app:tabTextColor="#fff"
        app:tabGravity="fill"
        android:theme="@style/Theme.AppCompat.DayNight.DarkActionBar"
        app:tabIndicatorColor="#D9C8F8" ></com.google.android.material.tabs.TabLayout>

</androidx.viewpager.widget.ViewPager>


<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/membreRelativel"

    android:layout_width="353dp"
    android:layout_height="445dp"
    android:layout_marginHorizontal="20dp"
    android:layout_marginVertical="60dp"
    android:background="@drawable/rounded_corner_shape_gris"
    android:elevation="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent">

    <LinearLayout

        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginTop="25dp"
        android:background="#ffff"
        android:orientation="vertical"
        android:weightSum="10">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/membresrecycler"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="9"></androidx.recyclerview.widget.RecyclerView>

        <Button
            android:id="@+id/goto_add_membres"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"
            android:textColor="#fff"
            android:background="@drawable/profile_first_layout"
            android:text="Ajouter des membres" />

    </LinearLayout>

    <TextView
        android:id="@+id/hideparticipants"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:text="X"
        android:textSize="20sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.952"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

<androidx.constraintlayout.widget.ConstraintLayout
    android:id="@+id/addmembreLayout"
    android:layout_width="307dp"
    android:layout_height="226dp"
    android:layout_marginHorizontal="50dp"
    android:layout_marginVertical="180dp"
    android:layout_marginBottom="386dp"
    android:background="@drawable/rounded_corner_shape_gris"
    android:elevation="25dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.24000001">

    <TextView

        android:layout_width="308dp"
        android:layout_height="26dp"
        android:background="#B6B5B5"

        android:fontFamily="@font/mermaid"
        android:text="Ajout d'un membre"
        android:textAlignment="center"
        android:textSize="18sp"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout4"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:id="@+id/titleaddmemebre"
        />

    <TextView
        android:layout_marginTop="2dp"
        android:textAlignment="center"
        android:id="@+id/hideaddmembre"
        android:layout_width="20dp"
        android:layout_height="20dp"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:elevation="2dp"
        android:text="X"
        android:textSize="20sp"
        android:layout_marginRight="7dp"
        />

    <LinearLayout
        android:id="@+id/linearLayout4"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:background="#fff"
        android:weightSum="10"
        android:orientation="vertical"
        android:gravity="bottom"
        app:layout_constraintTop_toBottomOf="@+id/titleaddmemebre"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent">

        <EditText
            android:id="@+id/addmembreemail"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginHorizontal="5dp"
            android:layout_marginTop="20dp"
            android:hint="Email" />

        <Button
            android:layout_marginTop="50dp"
            android:id="@+id/saveaddmembre"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"

            android:background="@drawable/profile_first_layout"
            android:text="Ajouter"
            android:layout_marginBottom="0dp"

            android:textColor="#ffff" />

    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

введите описание изображения здесь