Pulse/app/src/main/res/layout/popup.xml

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView 
    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="wrap_content"
    android:layout_height="wrap_content"
    android:clipChildren="false"
    android:clipToPadding="false"
    app:cardCornerRadius="24dp"
    app:cardElevation="4dp"
    android:padding="24dp"
    app:cardBackgroundColor="?attr/colorSurface">

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

        <TextView
            android:id="@+id/description"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="16dp"
            android:textSize="16sp"
            android:textAppearance="?attr/textAppearanceBodyMedium"
            android:textAlignment="center"
            tools:text="Popup text" />

        <ProgressBar
            android:id="@+id/progress"
            android:layout_width="match_parent"
            android:layout_height="3dp"
            android:layout_marginStart="12dp"
            android:layout_marginEnd="12dp"
            android:layout_marginBottom="8dp"
            android:indeterminate="false"
            android:max="100"
            style="@android:style/Widget.ProgressBar.Horizontal"/>
    </LinearLayout>
</com.google.android.material.card.MaterialCardView>