Android : Adding a Layout to the bottom of the screen

I have the following XML layout.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:padding="6dip" >

<TextView
    android:id="@+id/itemNumber"
    android:layout_width="wrap_content"
    android:layout_height="fill_parent"
    android:layout_alignParentBottom="true"
    android:layout_alignParentTop="true"
    android:layout_marginRight="6dip"
    android:textSize="50px"/>

<TextView
    android:id="@+id/secondLine"
    android:layout_width="fill_parent"
    android:layout_height="26dip"
    android:layout_alignParentBottom="true"
    android:layout_alignParentRight="true"
    android:layout_toRightOf="@id/itemNumber"
    android:ellipsize="marquee"
    android:singleLine="true"
    android:textSize="12sp" />

<TextView
    android:id="@+id/firstLine"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_above="@id/secondLine"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_alignWithParentIfMissing="true"
    android:layout_toRightOf="@id/itemNumber"
    android:gravity="center_vertical"
    android:textSize="16sp" />

<RelativeLayout 
    android:id="@+id/InnerRelativeLayout"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true" >

    <Button 
        android:text="Submit" 
        android:id="@+id/Button"
        android:layout_alignParentRight="true" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </Button>

    <EditText 
        android:id="@+id/EditText" 
        android:layout_width="fill_parent"
        android:layout_toLeftOf="@id/Button"
        android:layout_height="wrap_content">
    </EditText>

</RelativeLayout>

What i need to do is make the Edit Text & the Button to appear in the bottom of the screen. I'm using the 3 Text Views to as a List View. So i can choose one from the list and enter it into the Edit Text to submit the value.

But I cannot make 'em appear in the bottom. How can i do this?