public static CheckBox addCheckboxItem(final Activity activity, final ViewGroup viewGroup, final TextParam text, final int iconId) {
        return addCheckboxItem(activity, viewGroup, text, iconId, null);
    }
creates a column layout and returns it. Provides the option to specify individual layouts per column.

@param ctx               context to use for creating views
@param root              optional. If given, then the column layout will be created IN the given view instead of returning a new one.
@param columnCount       number of columns the layout shall have
@param withSeparator     if true, a vertical separator line will be drawn between columns
@param columnViewCreator will be called for each column index (0 - "columnCount-1") and shall return the columns content view.
                         May return null for some columns, in which case those are empty
@return new ViewGroup holding the column layout. If "root" was not null, then "root" is returned.
main/src/main/java/cgeo/geocaching/ui/ViewUtils.java