為什么 Marque 在 android 中不起作用？

Question

**This is my xml file**

\\\\\\
<androidx.constraintlayout.widget.ConstraintLayout 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:layout_width="match_parent" android:layout_height="text_conparent"

    <TextView
        android:text="WELCOME TO PATTAM ONLINE STORE"
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:scrollHorizontally="true"
        android:maxLines="1"
        android:freezesText="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"

        android:textColor="@color/black"
        app:layout_constraintBottom_toTopOf="@+id/framelayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.0" />

    <FrameLayout
        android:id="@+id/framelayout"
        android:layout_width="410dp"
        android:layout_height="631dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="0.44"
        tools:ignore="MissingConstraints">

    </FrameLayout>

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/bottom_navigation"
        style="@style/Widget.MaterialComponents.BottomNavigationView.Colored"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:itemIconTint="@color/black"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_bias="1.0"
        app:menu="@menu/bottom_nav" />
</androidx.constraintlayout.widget.ConstraintLayout>
\\\\\\\\
And i have included
 

TextView txtMarquee; 
@Override protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState); 
setContentView(R.layout.activity_main); 
txtMarquee=findViewById(R.id.textView); 
txtMarquee.setSelected(true);
------------------------------------------------------------------------