parallax scrolling in android

parallax scrolling in android

I have a layout which i want to apply parallax scrolling on. My layout is
as follows :

And the relevant XML is :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/top_control_bar"
android:background="@drawable/container_dropshadow">
<RelativeLayout
android:id="@+id/logo_layout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:background="#ffffff">
<ImageView
android:id="@+id/organiser_logo"
android:adjustViewBounds="true"
android:scaleType="centerCrop"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/bottom_layout"
android:layout_below="@+id/top_control_bar">
<LinearLayout
android:orientation="vertical"
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="fill_parent"
android:layout_below="@+id/top_control_bar"
android:layout_height="wrap_content"
android:background="@drawable/container_dropshadow"
android:id="@+id/explanation_wrapper">
<TextView
android:text="@string/no_event_header"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/explanation_header"
android:padding="8dip"
android:layout_width="wrap_content"
android:layout_height="fill_parent" />
<TextView
android:text="@string/no_event_text_1st_paragraph"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/explanation_1st_paragraph"
android:paddingTop="8dip"
android:paddingRight="20dip"
android:paddingBottom="10dip"
android:paddingLeft="10dip" />
</LinearLayout>
<ListView
android:id="@+id/album_active_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:choiceMode="singleChoice"
android:background="@drawable/container_dropshadow"
android:layout_below="@+id/explanation_wrapper" />
</RelativeLayout>
</RelativeLayout>
I need to get the middle layer to be scrolled over the bottom layer. And
when there is no space left in the top (middle layer is completely
scrolled over bottom layer), then i need the top layer to be scrolled over
the Middle layer.
How would i achieve this behaviour?