samples/VirtualDeviceManager/client/res/layout/display_fragment.xml

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:gravity="center_horizontal"
    android:orientation="vertical"
    android:padding="5dp">

    <LinearLayout
        android:id="@+id/display_header"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        app:layout_constraintBottom_toTopOf="@id/remote_display_view"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintVertical_chainStyle="packed">

        <TextView
            android:id="@+id/display_title"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:ellipsize="end"
            android:maxLines="1"
            android:padding="5dp"
            android:text="@string/display_title" />

        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">

            <ImageButton
                android:id="@+id/display_back"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/display_back"
                android:src="@drawable/back" />

            <ImageButton
                android:id="@+id/display_home"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/display_home"
                android:src="@drawable/home"
                android:visibility="gone" />

            <ImageButton
                android:id="@+id/display_rotate"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/display_rotate"
                android:src="@drawable/rotate" />

            <ImageButton
                android:id="@+id/display_resize"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/display_resize"
                android:src="@drawable/resize" />

            <ImageButton
                android:id="@+id/display_fullscreen"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/display_fullscreen"
                android:src="@drawable/fullscreen" />

            <ImageButton
                android:id="@+id/display_close"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:contentDescription="@string/display_close"
                android:src="@drawable/close" />
        </LinearLayout>
    </LinearLayout>

    <View
        android:id="@+id/strut"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toTopOf="@id/remote_display_view"
        app:layout_constraintEnd_toEndOf="@id/display_header"
        app:layout_constraintStart_toStartOf="@id/display_header"
        app:layout_constraintTop_toBottomOf="@id/display_header" />

    <TextureView
        android:id="@+id/remote_display_view"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintDimensionRatio="9:16"
        app:layout_constraintEnd_toEndOf="@id/display_header"
        app:layout_constraintStart_toStartOf="@id/display_header"
        app:layout_constraintTop_toBottomOf="@id/display_header" />

</androidx.constraintlayout.widget.ConstraintLayout>