Sorry, I am not aware of any issues like this. We used SharedPreferences
extensively in the standard applications, and I have never heard of their
values disappearing like that.
On Wed, Nov 19, 2008 at 1:09 PM, dar <[EMAIL PROTECTED]> wrote:
>
> I assume this is all I have to do to make sure the preferences are
> saved:
>
> SharedPreferences settings = MyActivity.this.getSharedPreferences
> ("MyAppName", 0);
> SharedPreferences.Editor editor = settings.edit();
> editor.putString("prefname", "namevalue");
> editor.commit();
>
> Then to load them like this:
>
> SharedPreferences settings = MyActivity.this.getSharedPreferences
> ("MyAppName", 0);
> String value = settings.getString("prefname", "defaultvalue");
>
> On my device, I never have seen a preference that was saved
> disappear. But two users out in the field say that after saving the
> information, about an hour later (or longer) the information
> disappears.
>
> The only way I see this happening as they describe is if the
> preferences are somehow erased. They say they are not uninstalling
> the app when this happens. I'm at a loss as to how to reproduce it,
> until I can get more information from them.
>
> I wrote a test app which just sets and gets preferences a number of
> times, but it never fails to get a previously set value. I don't know
> how to force the app to terminate and relaunch many times to see if
> that is the issue. Perhaps by creating one which responds to Intents
> to get/set the prefs? Is that a way to simulate this?
>
> On Nov 19, 2:50 pm, "Dianne Hackbod" <[EMAIL PROTECTED]> wrote:
> > Are you sure you call commit() after done with your edits? If you don't,
> > then the changes won't be written to disk, and at whatever point your
> > process is killed while in the background they will be lost. That is the
> > only way I can think of off-hand to explain what you describe.
> >
> >
> >
> >
> >
> > On Tue, Nov 18, 2008 at 9:09 PM, dar <[EMAIL PROTECTED]> wrote:
> >
> > > I'm having an issue where some users are seeing the SharedPreferences
> > > disappearing after some time. I have two separate Actvities, one
> > > writing, and the other reading. I assume these two activities are
> > > both in the same process (they both run from the same app), but is
> > > this causing the problem? What's curious to me is that I can't
> > > reproduce the problem myself on the G1.
> >
> > > On Nov 18, 9:36 pm, "Dianne Hackbod" <[EMAIL PROTECTED]> wrote:
> > > > SharedPreferences should be completely thread safe. Also, all of the
> > > normal
> > > > calls the system makes to your components happen in the same main
> thread
> > > of
> > > > the process, so except for special cases (as described in the app
> model
> > > doc)
> > > > you shouldn't be dealing with multithreading.
> >
> > > > Are all of these components running in the same process? Right now
> > > > SharedPreferences does not deal well with multiple components in
> separate
> > > > processes trying to use the same preferences data.
> >
> > > > On Tue, Nov 18, 2008 at 6:24 PM, Eric B <[EMAIL PROTECTED]> wrote:
> >
> > > > > I have a PreferenceActivity that uses an xml file to automatically
> > > > > populate and save the preferences. Sometimes though, when that
> > > > > activity is started, the preferences are blank. However, if you go
> > > > > back later, they will reappear.
> >
> > > > > This is causing a lot of headaches with my app. I have a Service
> and
> > > > > BroadcastReciever running in the background that are also accessing
> > > > > and (sometimes) updating the preferences. Are there
> synchronization
> > > > > issues with shared preferences? Maybe permission issues?
> >
> > > > > I'm really stuck here and would greatly appreciate any insight you
> can
> > > > > offer.
> >
> > > > > Thanks,
> > > > > Eric
> >
> > > > --
> > > > Dianne Hackborn
> > > > [EMAIL PROTECTED] Hide quoted text -
> >
> > > > - Show quoted text -
> >
> > --
> > Dianne Hackborn
> > [EMAIL PROTECTED] Hide quoted text -
> >
> > - Show quoted text -
> >
>
--
Dianne Hackborn
[EMAIL PROTECTED]
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