OpenTracks/src/main/res/layout/loading_indeterminate.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:id="@+id/loading_indeterminate"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/loading_text"
        style="@style/TextAppearance.MaterialComponents.Headline5"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textAlignment="center"
        app:layout_constraintVertical_chainStyle="packed"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toTopOf="@id/loading_indicator"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        tools:text="Text" />

    <com.google.android.material.progressindicator.LinearProgressIndicator
        android:id="@+id/loading_indicator"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="16dp"
        app:layout_constraintTop_toBottomOf="@id/loading_text"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:indeterminate="true" />

</androidx.constraintlayout.widget.ConstraintLayout>