You could try something like that (that's what I use:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<Button android:id="@+id/yourbutton"
android:layout_width="wrap_content" android:layout_height="wrap_content"></Button>
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:layout_below="@+id/yourbutton" >
<ListView android:id="@android:id/list" android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
</RelativeLayout>
And the list is supposedto scroll below your button, but display properly at the beginning...