MainActivity.xml

MainActivity.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"
    tools:context=".MainActivity">

    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:focusable="true"
        android:keepScreenOn="true"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <com.google.android.exoplayer2.ui.PlayerView
            android:id="@+id/player_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:focusable="true"
            app:controller_layout_id="@layout/exo_player_control_view"
            app:layout_constraintDimensionRatio="16:9"
            app:layout_constraintTop_toTopOf="@+id/frameLayout"
            app:resize_mode="fill">

            <ProgressBar
                android:id="@+id/progressBar"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:visibility="gone" />
        </com.google.android.exoplayer2.ui.PlayerView>
    </FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>