app/src/main/res/menu/menu_task.xml

<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="io.v.todos.TodoListActivity">
    <item
        android:orderInCategory="102"
        android:id="@+id/action_edit"
        android:title="@string/action_edit"
        android:icon="@drawable/ic_create_white_24dp"
        android:showAsAction="always" />
    <item
        android:id="@+id/show_done"
        android:orderInCategory="104"
        android:checkable="true"
        android:title="@string/show_done"
        android:showAsAction="never"/>
    <item
        android:id="@+id/action_debug"
        android:orderInCategory="105"
        android:title="@string/action_debug"
        android:showAsAction="never" />
</menu>