05.05.2011 14:22, Niall ?????:
I think I understand you... but I'm not sure that I do completely.
Having not used services for updating (or for managing updates) let me
first ask what you mean by pushing updates so I don't misunderstand.
By pushing an update I mean:
1 - Instantiating RemoteViews;
2 - Setting some values in it;
3 - Calling AppWidgetManager.updateAppWidget.
I call it "pushing" because the RemoteViews object is sent over to the
Launcher, which then displays the widget.
Does that mean that in a service I instantiate an appWidgetManager,
and then call its updateAppWidget with one RemoteViews? The
RemoteViews coming from some update function I write? I think I can do
that.
Yes. In a service or not. Not all widgets need a service just to build
the update.
And does that as a result mean that to fix the orientation issues that
this thread's about when I get an onConfigurationChanged notification
I do the same thing with the appWidgetManager and its updateAppWidget
method?
You won't need the service with onConfigurationChanged if you do this.
The problem with orientation changes happens when you update your widget
in several distinct updates: one to push the pending intents and some
initial values, then another to update some text view, etc.
The launcher only keeps one RemoteViews for each widget - the most
recent one. If it needs to recreate the widget, it does this by
reloading the widget's layout, and applying this saved RemoteViews.
So, you want to make sure that your RemoteViews objects can completely
specify the current state of your widget.
I think that makes sense. And that would be preferable to broadcasting
from the service back to the appwidget?
The service can be killed, and thus not receive any config change
notificaitons. The service also doesn't help if the Launcher (the home
screen) is killed.
-- Kostya
--
Kostya Vasilyev -- http://kmansoft.wordpress.com
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