I have a RelativeLayout, and this Layout has two childs, one is a MapView and the other a RelativeLayout that contains a button.
I want it to look like that

but my transparent box (a RelativeLayout) is always displayed at the top of the map.
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<com.google.android.maps.MapView
android:id="@+id/mapView"/>
<test.project.TransparentPanel
android:layout_width="fill_parent"
android:layout_width="fill_parent">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click Me!"/>
</test.project.TransparentPanel>
</RelativeLayout>
(i’ve left out some things in the code)
Try adding a alignParentBottom option to the transparent panel.