sheishuoAPP/app/res/menu/custom_notification_activity_menu.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/send_custom_notification"
        android:icon="@drawable/action_bar_black_more_icon"
        android:title=""
        app:showAsAction="always">
        <menu>
            <item
                android:id="@+id/send_custom_notification_to_buddy"
                android:title="@string/send_custom_notification_to_buddy"/>
            <item
                android:id="@+id/send_custom_notification_to_team"
                android:title="@string/send_custom_notification_to_team"/>
        </menu>
    </item>
</menu>