21.03.2011 17:01, Jake Colman пишет:
1) How does one provide multiple options for widget sizes? Do you just
add additional meta-data sections under the Receiver entry of the
manifest?
Essentially by providing entirely separate widgets, each having its own
size. They can share implementation (Java code, drawables, layouts), but
they should be declared as separate widgets as seen by Android.
2) How does one set options that are unique to a given instance? The app
currently uses SharedPreferences for all of its configuration. But
if both instances are running in the same context, how can each
widget know how it is configured as distinct from another instance?
Widget ids are persistent until a widget is removed. Store values in
shared preferences (or some other persistence mechanism) keyed by widget id.
3) The app uses a service that is started by an alarm in order to do the
updating. When the alarm is triggered, the service calculates the
time remaining until the event and then it updates the remote view.
Do both widgets share the same service? I'd that is the case since
it all one app with just multiple widget instances. If that's the
case, how can the service know which widget it is updating?
Use
AppWidgetManager.updateAppWidget(int widgetId, RemoteViews views)
to update only one particular widget.
You can get the ids when needed outside onUpdate like this:
AppWidgetManager manager = AppWidgetManager.getInstance(context);
ComponentName widgetClassName = new ComponentName(context, <your
WidgetProviderClass>);
int[] widgetIds = manager.getAppWidgetIds(widgetClassName);
Be aware that in some cases, there may be widget ids that refer to
non-existent widgets.
I documented my workaround for this issue here:
http://kmansoft.wordpress.com/2010/06/22/per-widget-options-stale-widgets/
--
Kostya Vasilyev -- http://kmansoft.wordpress.com
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