Magisk/app/src/main/res/layout/activity_main_md2.xml

<?xml version="1.0" encoding="utf-8"?>
<layout 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">

    <data>

        <variable
            name="viewModel"
            type="com.topjohnwu.magisk.ui.MainViewModel" />

    </data>

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:paddingLeft="@{viewModel.insets.left}"
        android:paddingRight="@{viewModel.insets.right}"
        tools:ignore="RtlHardcoded">

        <androidx.fragment.app.FragmentContainerView
            android:id="@+id/main_nav_host"
            android:name="androidx.navigation.fragment.NavHostFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:defaultNavHost="true"
            app:navGraph="@navigation/main" />

        <com.google.android.material.appbar.AppBarLayout
            android:id="@+id/main_toolbar_wrapper"
            style="@style/WidgetFoundation.Appbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:paddingTop="@{viewModel.insets.top}">

            <com.google.android.material.appbar.MaterialToolbar
                android:id="@+id/main_toolbar"
                style="@style/WidgetFoundation.Toolbar"
                android:layout_width="match_parent"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_scrollFlags="noScroll"
                tools:layout_marginTop="24dp"
                tools:title="Home" />

            <View
                gone="@{android.os.Build.VERSION.SDK_INT >= 21}"
                android:layout_width="match_parent"
                android:layout_height="2dp"
                android:background="?colorSurfaceVariant"/>

        </com.google.android.material.appbar.AppBarLayout>

        <!--
        todo(diareuse) this stupid-ass bottom menu doesn't fit with the fab-s, so either of those
         things need to be removed, probably the fab-s.

         Using the BottomAppBar is not viable as it looks terrible with the blank space in the
         middle and / or with the "animation" which BottomNavigationView performs when it's
         reinflating its menu items. This bullshit cockblocks the entire feature. Terrific.

         Possibility is then to keep the middle fab and assign it some other functionality on all
         screens. Which -ha-ha- good luck finding something on superuser and homepage...
         -->
        <com.google.android.material.card.MaterialCardView
            android:id="@+id/main_bottom_bar"
            style="@style/WidgetFoundation.Card.Elevated"
            android:layout_width="224dp"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|center_horizontal"
            android:layout_marginStart="@dimen/l1"
            android:layout_marginEnd="@dimen/l1"
            android:layout_marginBottom="@{(int) @dimen/l1 + viewModel.insets.bottom}"
            tools:layout_marginBottom="64dp">

            <com.google.android.material.bottomnavigation.BottomNavigationView
                android:id="@+id/main_navigation"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@android:color/transparent"
                android:textStyle="bold"
                app:elevation="0dp"
                app:itemHorizontalTranslationEnabled="false"
                app:itemIconTint="@color/color_menu_tint"
                app:itemRippleColor="?colorPrimary"
                app:itemTextAppearanceActive="@style/AppearanceFoundation.Tiny.Bold"
                app:itemTextAppearanceInactive="@style/AppearanceFoundation.Tiny.Bold"
                app:itemTextColor="@color/color_menu_tint"
                app:labelVisibilityMode="unlabeled"
                app:menu="@menu/menu_bottom_nav" />

        </com.google.android.material.card.MaterialCardView>

    </androidx.coordinatorlayout.widget.CoordinatorLayout>

</layout>