Re: Basic question on activity and places

Thanks Jens.
A quick followup question.
You have mentioned Display Area. From the response, I take it a Place
is bigger than a display area and multiple Display Areas make up a
place.right?
So if there is one ActivityMapper per Display Area, which would
indicate multiple ActivityMappers per Place, which component is
responsible for deciding which ActivityMapper be used when you are in
a Place? Thanks.

-sri

On Jan 3, 2:26 pm, Jens <jens.nehlme...@gmail.com> wrote:
> If you have multiple display areas in your app you would have multiple
> ActivityMappers (one per display area, e.g. a master area and a detail
> area). Now if you go to a Place each ActivityMapper can return a different
> Activity based on the Place. So its more like one-to-<number of activity
> mappers>. A common example is that you have a ListEmailActivity that shows
> a list of emails and a EMailDetailsActivity that actually shows the
> selected email's content. Both can be started at the same time if the list
> of emails and the contents of the selected email are visible at the same
> time. If an ActivityMapper does not need to return an Activity for a place
> it can return null or return a default Activity that displays a message or
> something. You could use both methods, e.g. if you return null it means
> "hide the entire display area because I don't need it for that place" and
> if you want to show a message return a MessageActivity instead.
>
> It can also happen that an ActivityMapper can start the same Activity for
> different places. For example you could have a single ListActivity that
> defines a general set of features for a list style view (for example
> searching the list, list ordering, etc.) but uses a ListAdapter to manage
> the displayed objects. If you now have EmailListPlace, PersonListPlace,
> etc. they all would start a ListActivity but for each Place the
> ListActivity would use a different ListAdapter, e.g. EmailAdapter,
> PersonAdapter, etc.
>
> -- J.

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