menu_main.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"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".MainActivity">

    <item
        android:id="@+id/menu_add"
        android:icon="@drawable/ic_new"
        android:title="Add"
        app:showAsAction="always" />

    <item
        android:id="@+id/menu_save"
        android:icon="@drawable/ic_save"
        android:title="Save"
        app:showAsAction="always" />

    <item
        android:id="@+id/menu_remove"
        android:icon="@drawable/ic_remove"
        android:title="Remove"
        app:showAsAction="always" />

</menu>