Android interface, fixed top, bottom navigation. Can slide in the middle

<?XML version= "1.0" encoding= "Utf-8"?><Relativelayoutxmlns:android= "Http://schemas.android.com/apk/res/android"Android:layout_height= "Match_parent"Android:layout_width= "Match_parent"Android:background= "#FFF"Android:paddingbottom= "50DP"Android:fillviewport= "true">         <!--Refresh Cue Area -     <RelativelayoutAndroid:layout_height= "50DP"Android:layout_width= "Match_parent"Android:layout_margintop= "0DP"Android:background= "#000">               </Relativelayout>    <!--/Refresh Cue area -            <!--Content List Area -    <LinearLayoutAndroid:layout_height= "Wrap_content"Android:layout_width= "Match_parent"Android:layout_margintop= "50DP"android:orientation= "vertical"Android:background= "#FFF">                     <ListViewAndroid:id= "@+id/mainuserlist"Android:layout_height= "Match_parent"Android:scrollbarstyle= "Outsideoverlay"android:scrollbarsize= "1DP"android:scrollbarthumbvertical= "@drawable/bar"Android:layout_width= "Match_parent"    >          </ListView>       </LinearLayout>    <!--/Content List Area -                   <!--Fixed Top -     <LinearLayoutAndroid:layout_width= "Match_parent"Android:layout_height= "50DP"Android:layout_alignparenttop= "true"Android:background= "#0C0">       </LinearLayout>    <!--/fixed Top -         <!--Fixed Bottom -     <LinearLayoutAndroid:id= "@+id/linearlayout01"Android:layout_width= "Match_parent"Android:background= "#EEE"Android:layout_height= "50DP"Android:layout_marginbottom= " -50DP"Android:layout_alignparentbottom= "true"android:orientation= "vertical">    </LinearLayout>    <!--/Fixed Bottom -             </Relativelayout>

Android interface, fixed top, bottom navigation. Can slide in the middle