main_menu.xml (angka notifikasi)

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="com.testing1notifikasi.matrisno.MainActivity">
    <item
        android:id="@+id/notification"
        android:actionLayout="@layout/actionbar_notification"
        android:icon="@drawable/ic_notifications_black_24dp"
        android:title="Notification"
        />
</menu>