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 07:52:12.539: ERROR/AndroidRuntime(5877): Caused by:
> java.lang.IllegalArgumentException: Wrong state class -- expecting
> View State
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.View.onRestoreInstanceState(View.java:5359)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.View.dispatchRestoreInstanceState(View.java:5335)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:
> 1093)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:
> 1097)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:
> 1097)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:
> 1097)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.ViewGroup.dispatchRestoreInstanceState(ViewGroup.java:
> 1097)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.view.View.restoreHierarchyState(View.java:5314)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState
> (PhoneWindow.java:1501)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.app.Activity.onRestoreInstanceState(Activity.java:834)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.app.Activity.performRestoreInstanceState(Activity.java:800)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.app.Instrumentation.callActivityOnRestoreInstanceState
> (Instrumentation.java:1172)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
> 2245)
> 11-24 07:52:12.539: ERROR/AndroidRuntime(5877): ... 11 more
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