you have to set android:clipToPadding="false"
like this:
<ListView
android:id="@+id/your_listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:cacheColorHint="#00000000"
android:paddingBottom="15dp"
android:paddingTop="15dp"
android:clipToPadding="false"
android:scrollbars="none" >
</ListView>