how to invisible item 

use setMenuItemEnabled() function , can not be success 
use android:visible="false" is same 
`
<item
        android:id="@+id/connect"
        android:color="?colorPrimary"
        android:icon="@drawable/ic_network_connection"
        android:contentDescription="@string/connect"
        android:title="@string/connect"/>`
