Does someone know how to use PagerTitleStrip in Android

I decided to use a ViewPager in my application and everything is working fine. I Know that I want to use a PagerTitleStrip in my ViewPager, but I've failed to find any info on how to do it... The one and only page (sic!!) I found on this class is http://developer.android.com/reference/android/support/v4/view/PagerTitleStrip.html So it seems I just need to add the PagerTitleStrip within my ViewPager layout, but I don't see anything new on my activity...

<android.support.v4.view.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <android.support.v4.view.PagerTitleStrip
        android:id="@+id/pagerTitleStrip"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom" />
</android.support.v4.view.ViewPager>

Does anyone know how to use it?

Edited: Sorry it works when implementing the getPageTitle method in the ViewPagerAdapter... but I don't want any text displayed, just a small cursor to show the position of the current View compared to the previous and next ones...