snippets/multiplatform-tutorial/activity_main.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" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <androidx.swiperefreshlayout.widget.SwipeRefreshLayout android:id="@+id/swipeContainer"
        android:layout_width="match_parent" android:layout_height="match_parent"
        app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent">

        <androidx.recyclerview.widget.RecyclerView android:id="@+id/launchesListRv" android:layout_width="match_parent"
            android:layout_height="match_parent" />

    </androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

    <FrameLayout android:id="@+id/progressBar" android:layout_width="0dp" android:layout_height="0dp"
        android:background="#fff" app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <ProgressBar android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:layout_gravity="center" />

    </FrameLayout>

</androidx.constraintlayout.widget.ConstraintLayout>