activity_1.xml

<TextView
        android:id="@+id/test_text"
        style="?attr/TextViewStyle"
        android:layout_width="0dp"
        android:layout_height="200dp"
        android:layout_marginStart="5dp"
        android:layout_marginTop="10dp"
        android:layout_marginEnd="5dp"
        android:layout_marginBottom="200dp"
        android:background="#504C4C"
        android:fadeScrollbars="true"
        android:isScrollContainer="true"
        android:overScrollMode="ifContentScrolls"
        android:scrollIndicators="right"
        android:scrollbarStyle="outsideOverlay"
        android:scrollbars="vertical"
        android:textColor="?attr/text_color"
        android:translationZ="0dp"
        android:verticalScrollbarPosition="right"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.0"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/addLine"
        app:layout_constraintVertical_bias="0.0" />