Always Show Labels

Even if the material design guidelines specify that

If there are four or five actions, display inactive views as icons only

there's the possibility to override this behavior by using bbn_alwaysShowLabels attribute in the menu itself. For instance, this menu:

<?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"
    android:background="@color/colorPrimaryDark"
    app:bbn_alwaysShowLabels="true"
    app:bbn_itemColorActive="@android:color/white"
    app:bbn_itemColorDisabled="#33ffffff"
    app:bbn_itemColorInactive="#99ffffff"
    app:bbn_rippleColor="#ccffffff">

    <item
        android:id="@+id/bbn_item1"
        android:icon="@drawable/ic_cloud_off_white_24dp"
        android:title="Cloud Sync" />
    <item
        android:id="@+id/bbn_item2"
        android:icon="@drawable/ic_cast_connected_white_24dp"
        android:title="Chromecast" />
    <item
        android:id="@+id/bbn_item3"
        android:icon="@drawable/ic_mail_white_24dp"
        android:title="Mail" />
    <item
        android:id="@+id/bbn_item4"
        android:icon="@drawable/ic_format_list_numbered_white_24dp"
        android:title="List" />
</menu>

will display a bottom menu with 4 items (fixed type) all with labels.
This feature has been introduced since version 2.0.0.