mihon/app/src/main/res/menu/chapters.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/action_filter"
        android:icon="@drawable/ic_filter_list_white_24dp"
        android:title="@string/action_filter"
        app:showAsAction="ifRoom">
        <menu>
            <item
                android:id="@+id/action_filter_downloaded"
                android:checkable="true"
                android:title="@string/action_filter_downloaded"/>
            <item
                android:id="@+id/action_filter_unread"
                android:checkable="true"
                android:title="@string/action_filter_unread"/>
            <item
                android:id="@+id/action_filter_empty"
                android:title="@string/action_filter_empty"/>
        </menu>
    </item>

    <item
        android:id="@+id/action_sort"
        android:icon="@drawable/ic_sort_by_alpha_white_24dp"
        android:title="@string/action_sort"
        app:showAsAction="ifRoom"/>

    <item
        android:id="@+id/action_display_mode"
        android:title="@string/action_display_mode"
        app:showAsAction="never" />

    <item
        android:id="@+id/manga_download"
        android:title="@string/manga_download"
        app:showAsAction="never" />
</menu>