Having trouble understanding how ArrayAdapter identifies the specific ListView in activity_main_list

In the lesson 'Adding Data for the list", an ArrayAdapter is used to take in an array and adapt it for a list:

'''java protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main_list); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, mAndroidNames); setListAdapter(adapter); } '''

I understand how '''java setContentView(R.layout.activity_main_list); ''' Identifies which content layout to use.

What I don't understand is how in the onCreate method, it knows to use a particular ListView in activity_main_list.xml:

'''xml <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.teamtreehouse.blogreader.MainListActivity$PlaceholderFragment" >

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true" >
</ListView>

<TextView android:id="@android:id/empty"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:text="No items to display!" />

</RelativeLayout>'''

I can assume that it simply finds the solitary ListView that's in there currently, but what if there is more than one ListView within the relative layout?

What in the onCreate method is identifying that exact ListView?