activity_leaderbpard.xml

<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
    android:background="@color/black"
    tools:context=".leaderboard">

    <TextView
        android:id="@+id/tvtitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="29dp"
        android:text="Rank of Participants"
        android:textColor="@color/white"
        android:textSize="24sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ListView
        android:id="@+id/score_list"
        android:layout_width="407dp"
        android:layout_height="0dp"
        android:layout_marginTop="33dp"
        android:layout_marginBottom="1dp"
        android:background="@color/black"
        android:dividerHeight="0dp"
        android:divider="@null"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/tvtitle" />

</androidx.constraintlayout.widget.ConstraintLayout>