set android: dividerHeight = "1dp"
<ListView
android:id="@+id/myphnview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@drawable/dividerheight"
android:background="#E9EAEC"
android:clickable="true"
android:divider="@color/white"
android:dividerHeight="1dp"
android:headerDividersEnabled="true" >
</ListView>