How to create a bottom bar in android

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/RelativeLayout01"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

  <--  <ListView
        android:id="@+id/listview1"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/bottombar"
        android:fastScrollEnabled="true" >
    </ListView>  -->



    <LinearLayout
        android:id="@+id/bottombar"
        style="?android:buttonBarStyle"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:divider="?android:dividerVertical"
        android:dividerPadding="8dp"
        android:gravity="center_horizontal"
        android:showDividers="middle" >

        <Button
            android:id="@+id/events_list_view_organizing_button"
            style="?android:buttonBarButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onClick"
            android:text="Cancel" >
        </Button>

        <Button
            android:id="@+id/events_list_view_attending_button"
            style="?android:buttonBarButtonStyle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:onClick="onClick"
            android:text="Done" >
        </Button>
    </LinearLayout>

</RelativeLayout>

ScreenShot