Albert,
25.06.2010 0:29, Albert ?????:
>
> The AppWidgetProvider is notified on every add and remove operation,
> along with first-add and last-remove operations.
I have tried that but there are scenarios in which is does not work,
the user for example could have 2 instances of the widget and then
delete one...
It works, first you get APPWIDGET_DELETED for the deleted widget id,
then possibly APPWIDGET_DELETED for the other one (or APPWIDGET_UPDATE
with some new widget id).
>
> Or, you can ask your AppWidgetManager getAppWidgetIds().
I can definetly use this. I have played a bit with the onUpdate() and
onDeleted() methods and I can see a new value (id) generated for each
instance of the widget, so now I can use it to know whether I have any
on the homescreen, thus I will not have a service running with no
widget:)
There are actions just for this:
http://developer.android.com/reference/android/appwidget/AppWidgetProvider.html
public static final String ACTION_APPWIDGET_ENABLED
Sent when an instance of an AppWidget is added to a host for the
first time. This broadcast is sent at boot time if there is a
AppWidgetHost installed with an instance for this provider.
See Also AppWidgetProvider.onEnabled(Context context)
public static final String ACTION_APPWIDGET_DISABLED
Sent when an instance of an AppWidget is removed from the last host.
See Also AppWidgetProvider.onEnabled(Context context)
However, if your service is for just updating the widget, you can do
startService from onUpdate(), have the service update all your widgets
(using AppWidgetManager updateAppWidget (ComponentName provider,
RemoteViews views)), and exit.
--
Kostya Vasilev -- WiFi Manager + pretty widget -- http://kmansoft.wordpress.com
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