[android-developers] Re: Adding separators to a ListView

Many thanks Mark, this looks great, will take a look.

On Nov 11, 12:26 pm, Mark Murphy <mmur...@commonsware.com> wrote:
> On Thu, Nov 11, 2010 at 7:20 AM, Neilz <neilhorn...@gmail.com> wrote:
> > Hi all. I have created a ListView from a collection of objects, using
> > an ArrayAdaptor to set the items.
>
> > The objects used to populate the list have a NAME field, and are
> > sorted into alphabetical order, so ultimately the ListView is long
> > list of names.
>
> > I now want to make the list more user friendly. I'd like to add a
> > separator for each letter of the alphabet, saying "A", "B" etc. The
> > separator could be one of the list items (non-clickable) or just a
> > normal View.
>
> > I'm just not sure how I can manipulate the ListView to achieve this,
> > and would appreciate any help.
>
> It's not a question of the ListView, but of the ListAdapter. Your
> ListAdapter needs to:
>
> -- Override getViewTypeCount() to return 2
> -- Override getItemViewType() to return 0 for regular rows and 1 for headings
> -- Override getView() (or newView() and bindView() for CursorAdapter)
> and have it properly create the right rows and bind them
>
> This is somewhat of a pain.
>
> I have a MergeAdapter that can simplify it, but only where each
> section is its own adapter, with plain Views being interspersed:
>
> https://github.com/commonsguy/cwac-merge
>
> Creating a HeaderCursorAdapter that injects headings based on some
> rule (e.g., when the first letter of such-and-so column in the Cursor
> changes) is on my list of 18,000 things to do. Though anyone is
> welcome to go and beat me to writing it. :-)
>
> --
> Mark Murphy (a Commons Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy
>
> Android App Developer Books:http://commonsware.com/books

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