I have a layout made of a MapView and a Listview 50-50 (image link below)

<http://imgur.com/uRIS9AN>

I want to handle the scroll event of the ListView, to expand it to fullscreen before it scrolls through the elements of the list.

Layout:

```
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1">
<com.google.android.gms.maps.MapView
    android:id="@+id/mapView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true" />
</LinearLayout>
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="0dp"
    android:layout_weight="1">
<ListView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/fortress_listview">
</ListView>
</LinearLayout>
</LinearLayout>

```