about.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/segmentBarLayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/aboutToolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />
    </com.google.android.material.appbar.AppBarLayout>

    <br.tiagohm.markdownview.MarkdownView
        android:id="@+id/aboutMarkdownView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="48dp"
        app:escapeHtml="false" />
</LinearLayout>