mihon/app/src/main/res/layout/action_toolbar.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="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="12dp"
    android:clipToPadding="false"
    android:visibility="gone"
    tools:visibility="visible">

    <com.google.android.material.appbar.MaterialToolbar
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:layout_gravity="bottom"
        app:contentInsetEnd="8dp"
        app:contentInsetStart="8dp">

        <androidx.appcompat.widget.ActionMenuView
            android:id="@+id/menu"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="center" />

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

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