How can I setText to a TextView in every single row of my ListView

Hi guys I am new to Android and also to stackoverflow, Greetings and thanks for the help.

I have 2 Xml files for the same activity. One that contains a ListView and the second as my custom layout for an ArrayAdapter that populates a ListView which is also included on my first layout:

<include android:id="@+id/lv" layout="@layout/lv_row" />

ListView Custom Layout (lv_row.xml):

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
    android:layout_width="fill_parent" android:layout_height="fill_parent">


    <ImageView
        android:layout_width="50dp"
        android:layout_height="50dp"
        android:id="@+id/icon"
        android:src="@drawable/ic_launcher"/>
    <TextView
        android:layout_toRightOf="@+id/icon"
        android:layout_width="fill_parent"
        android:layout_height="38dp"
        android:textSize="30sp"
        android:id="@+id/label"/>
    <TextView
        android:layout_toRightOf="@+id/icon"
        android:layout_below="@+id/label"
        android:layout_width="fill_parent"
        android:layout_height="12dp"
        android:gravity="bottom"
        android:id="@+id/label2"

        android:textSize="12sp"/>

</RelativeLayout>

This is my adapter:

final ArrayAdapter<String> Array = new ArrayAdapter<String>(this,R.layout.lv_row,R.id.label,myList);

I save strings one by one into "myList" and display them on my ListView, what I want to do is to enumerate the elements on my list view by using idNum.setText(iterating_variable.toString())... but it won't work because idNum always get the value that was set on the XML file.

This is the code I use to link the second XML with my Java code

lv = (RelativeLayout) findViewById(R.id.lv);        
    idNum = (TextView) lv.findViewById(R.id.label2);

Thanks again for your help.