Hi Dianne,
I'm not implementing any of those methods in my app - is the only
other thing that could cause this error is if some of my views are
somehow being assigned ids, view View.setId()?
Thanks
On Nov 24, 10:47 pm, Dianne Hackborn <hack...@android.com> wrote:
> I would certainly expect an error if you are trying to put an object in the
> bundle whose parcelable protocol is not implemented correctly.
>
> On Tue, Nov 24, 2009 at 7:21 PM, Streets Of Boston
> <flyingdutc...@gmail.com>wrote:
>
> > I fixed my particular situation.
>
> > I forgot to implement the static CREATOR in my own ViewBundle class
> > (which extends BaseSavedState).
> > This prevented the construction of new ViewBundle classes. I just
> > added the static CREATOR variable and all goes well.
>
> > However, should the above exception still happen, despite me coding
> > the ViewBundle incorrectly?
>
> > On Nov 24, 9:43 pm, Streets Of Boston <flyingdutc...@gmail.com> wrote:
> > > Thank you, Dianne.
> > > This is in my log:
>
> > > From onSaveInstanceState, this one is being saved:
> > > 11-24 21:38:52.786: VERBOSE/smugdroid(12475):
> > > Saved Bundle Instance is
> > > com.streetsofboston.smugdroid.snapfx.images.SnapFXImageViewContainer
> > > $viewbun...@432e6760
>
> > > From onRestoreInstanceState, this is printend:
> > > 11-24 21:29:16.706: VERBOSE/smugdroid(12341):
> > > Bundle Instance is android.view.view$basesavedst...@4325ac40
> > > 11-24 21:29:16.706: VERBOSE/smugdroid(12341):
> > > BaseSavedState.EMPTY_STATE instance is android.view.AbsSavedState
> > > $...@400681f0
>
> > > Where 'bundle instance' is the value of 'parcelable'.
> > > And the second one is the value of BaseSavedState.EMPTY_STATE.
>
> > > As you can see, they are not the same object --> If i would just pass
> > > 'parcelable' to the super-class' method, an exception would be throw:
>
> > > Snippet from android/view/View.java:
> > > protected void onRestoreInstanceState(Parcelable state) {
> > > mPrivateFlags |= SAVE_STATE_CALLED;
> > > if (state != BaseSavedState.EMPTY_STATE && state != null) {
> > > throw new IllegalArgumentException("Wrong state class -- expecting
> > > View State");
> > > }
>
> > > }
>
> > > Also strange is that my original ViewBunlde instance is not sent to
> > > onRestoreInstanceState...... why is that?
>
> > > On Nov 24, 9:04 pm, Dianne Hackborn <hack...@android.com> wrote:
>
> > > > What type of view is it? There are only a handful of view classes that
> > > > actually save and restore state (TextView and a few others). What type
> > of
> > > > object is it returning? (You could print the state bundle in
> > > > onSaveInstanceState().)...
>
> > > > read more »
>
> > > > On Tue, Nov 24, 2009 at 4:41 PM, Streets Of Boston
> > > > <flyingdutc...@gmail.com>wrote:
>
> > > > > Thanks Romain,
>
> > > > > Did not work... still the exception...
>
> > > > > It occurs on a View with an ID set to 'container'.
> > > > > And i went into my View hierarchy to check. All looks fine.:
> > > > > There is only one view with the id set to 'container'.
> > > > > Every other view in the hierarchy has a unique name or no id at all.
>
> > > > > And still i get the exception after my process is killed, restarted
> > > > > and my view is about to be restored....
> > > > > Doing super.onRestoreInstanceState(BaseSavedState.EMPTY_STATE); gets
> > > > > rid of that exception.
>
> > > > > Here's my code-snippet.
> > > > > @Override
> > > > > protected void onRestoreInstanceState(Parcelable parcelable) {
> > > > > if (parcelable instanceof ViewBundle) {
> > > > > final ViewBundle viewBundle = (ViewBundle)parcelable;
> > > > > mSaveState = viewBundle.getBundle();
>
> > > > > // Note that mRestoredBitmapOffFullSizedImage can be
> > null!
> > > > > // It won't be null on a configuration change, but it
> > may be
> > > > > // after this view's process/activity is restarted.
> > > > > mRestoredBitmapOffFullSizedImage =
> > > > > (Bitmap)viewBundle.getTransient
> > > > > ("bitmapholder");
>
> > super.onRestoreInstanceState(viewBundle.getSuperState());
> > > > > }
> > > > > else {
> > > > > // TODO
> > > > > // This exception can be thrown when:
> > > > > // Do edit image (Effects)
> > > > > // Open Dialer app, make sure process
> > > > > smugdroid.process.pictures
> > > > > is killed.
> > > > > // Then return to SnapFX -->
> > > > > // java.lang.IllegalArgumentException: Wrong state
> > class --
> > > > > expecting View Sate.
> > > > > // Fixed it by always using BaseSavedState.EMPTY_STATE
> > > > > instead of
> > > > > 'parcelable'....
> > > > > super.onRestoreInstanceState(parcelable); // <--
> > Exception
> > > > > happens
> > > > > here when using 'parcelable'.
> > > > > }
> > > > > }
>
> > > > > On Nov 24, 5:57 pm, Romain Guy <romain...@google.com> wrote:
> > > > > > That would be worrisome because we do not save/restore the state of
> > > > > > views without ids.
>
> > > > > > On Tue, Nov 24, 2009 at 2:39 PM, Streets Of Boston
>
> > > > > > <flyingdutc...@gmail.com> wrote:
> > > > > > > I'm going to check that out.
>
> > > > > > > What if it occurs on a View without an ID?
>
> > > > > > > Thanks!
>
> > > > > > > On Nov 24, 11:27 am, Romain Guy <romain...@google.com> wrote:
> > > > > > >> This would happen if you have several views of different type
> > with the
> > > > > > >> same id inside a single view hierarchy. This could cause other
> > > > > > >> problems so I really advise you to not hack around the default
> > > > > > >> implementation of onRestoreInstanceState() but make sure that
> > your UI
> > > > > > >> is setup correctly.
>
> > > > > > >> On Tue, Nov 24, 2009 at 7:28 AM, Streets Of Boston
>
> > > > > > >> <flyingdutc...@gmail.com> wrote:
> > > > > > >> > i've seen this too.
> > > > > > >> > I got around it by overriding the problematic View's
> > > > > > >> > onRestoreInstanceState method:
>
> > > > > > >> > public void onRestoreInstanceState(Bundle savedState) {
> > > > > > >> > ...
> > > > > > >> > ...
> > > > > > >> > super.onRestoreInstanceState(BaseSavedState.EMPTY_STATE);
> > > > > > >> > }
>
> > > > > > >> > I took a look at the android.view.View's implementation of
> > this
> > > > > > >> > onRestoreInstanceState method and it only expects the
> > > > > > >> > BaseSavedState.EMPTY_STATE as valid input. It checks for if
> > > > > > >> > (savedState != BaseSavedState.EMPTY_STATE) then throw
> > exception ...
>
> > > > > > >> > For me it went wrong because 'savedState' is no longer the
> > actual
> > > > > > >> > BaseSavedState.EMPTY_STATE instance but a de-serialized copy
> > of it
> > > > > > >> > (after the killed process has been restored/restarted) and
> > this
> > > > > means
> > > > > > >> > that the '!=' operator returns true and an exception is
> > thrown.
>
> > > > > > >> > On Nov 24, 10:08 am, Mark Wyszomierski <mar...@gmail.com>
> > wrote:
> > > > > > >> >> Hi,
>
> > > > > > >> >> I'm testing how my app behaves when killed by the OS due to
> > low
> > > > > memory
> > > > > > >> >> conditions. I always have three activities on the stack,
> > like:
>
> > > > > > >> >> A B C (then C launches maps or some other heavy
> > process)
>
> > > > > > >> >> when my app is killed, and I return to it, C starts itself up
> > again
> > > > > > >> >> ok. When I hit the back button to go to B, I [sometimes] get
> > an
> > > > > > >> >> exception thrown which I can't trace. Output is below. I
> > don't know
> > > > > > >> >> where to go from here. I've only seen one other post
> > mentioning
> > > > > this
> > > > > > >> >> exception, but it was related to a reproducable error when
> > rotating
> > > > > > >> >> the device. This only happens sometimes. Thanks for any help:
>
> > > > > > >> >> 11-24 07:52:12.469: ERROR/AndroidRuntime(5877): Uncaught
> > handler:
> > > > > > >> >> thread main exiting due to uncaught exception
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877):
> > > > > > >> >> java.lang.RuntimeException: Unable to start activity
> > ComponentInfo
> > > > > > >> >> {com.test.android/com.test.android.ui.ActivityHello}:
> > > > > > >> >> java.lang.IllegalArgumentException: Wrong state class --
> > expecting
> > > > > > >> >> View State
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
>
> > > > > android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
> > > > > > >> >> 2268)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
>
> > > > > android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
> > > > > > >> >> 2284)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
>
> > android.app.ActivityThread.access$1800(ActivityThread.java:112)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
>
> > > > > android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> android.os.Handler.dispatchMessage(Handler.java:99)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> android.os.Looper.loop(Looper.java:123)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> android.app.ActivityThread.main(ActivityThread.java:3948)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> java.lang.reflect.Method.invokeNative(Native Method)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> java.lang.reflect.Method.invoke(Method.java:521)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
> > > > > > >> >> (ZygoteInit.java:782)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
> > > > > > >> >> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> > > > > > >> >> dalvik.system.NativeStart.main(Native Method)
> > > > > > >> >> 11-24
>
> ...
>
> read more »
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