I have a ListView with an empty list catch in the XML and it works fine. How to toggle ListView Empty Text please ?

This is my XML code :

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
    android:id="@+id/empty"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/emptyList" />

    <ListView
        android:id="@+id/list"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        /> 

</LinearLayout>

I'm not using a ListActivity. It s possible to do that please ?