android:animateLayoutChanges won't work in parent layout

Suppose I have a layout file structured like this:

<LinearLayout android:id="@+id/main" android:orientation="vertical" android:animateLayoutChanges="true">
    <EditText>

    <TextView android:id="@+id/header1">
    <LinearLayout android:id="@+id/insertionPoint" android:orientation="vertical" android:animateLayoutChanges="true">
    </LinearLayout>

    <TextView android:id="@+id/header2">
</LinearLayout>

I want to dynamically add text fields to the Layout insertionPoint and I would like to see an animation of the elements below it (in this case, header2) sliding down.

Using android:animateLayoutChanges only animates the elements in the layout insertionPoint, so there is no animation for header2. What should I do?

Just to be more clear: what I would like to do here is something like the animations that we can see in the People app in ICS when we add more fields, like telephone numbers, to a contact.

Thank you!