I can't find a way to hide dividers on an ExpandableListView without hiding the child dividers too.

Here is my code.

<ExpandableListView 
            android:id="@+id/activities_list"
            android:background="@android:color/transparent"
            android:fadingEdge="none"           
            android:groupIndicator="@android:color/transparent"
            android:divider="@android:color/transparent"
            android:childDivider="@drawable/list_divider"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />

With this code, I get no dividers on groups but no child dividers neither. If I set android:divider to "@drawable/list_divider" I get both group and child dividers.

Thanks in advance!