Recently, we have been getting a few of following exceptions in our app:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.myapp.android/com.myapp.android.WelcomeActivity}: java.lang.RuntimeException: Parcel android.os.Parcel@426f0118: Unmarshalling unknown type code 2131558952 at offset 736 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2429) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2493) at android.app.ActivityThread.access$800(ActivityThread.java:166) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1283) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:136) at android.app.ActivityThread.main(ActivityThread.java:5584) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.RuntimeException: Parcel android.os.Parcel@426f0118: Unmarshalling unknown type code 2131558952 at offset 736 at android.os.Parcel.readValue(Parcel.java:2087) at android.os.Parcel.readSparseArrayInternal(Parcel.java:2382) at android.os.Parcel.readSparseArray(Parcel.java:1742) at android.os.Parcel.readValue(Parcel.java:2077) at android.os.Parcel.readArrayMapInternal(Parcel.java:2321) at android.os.Bundle.unparcel(Bundle.java:249) at android.os.Bundle.getSparseParcelableArray(Bundle.java:1273) at com.android.internal.policy.impl.PhoneWindow.restoreHierarchyState(PhoneWindow.java:1884) at android.app.Activity.onRestoreInstanceState(Activity.java:989) at android.app.Activity.performRestoreInstanceState(Activity.java:961) at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1145)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2407) ... 11 more
I checked my activity but there is nothing related to Parcelable stuff. So I dug more and found Parcelable code in one of our widgets that is being used in the activity. I have very high suspicion that it might be caused by the following code:
protected override void OnRestoreInstanceState(IParcelable state)
{
try
{
SavedState savedState = (SavedState)state;
base.OnRestoreInstanceState(savedState.SuperState);
mCurrentPage = savedState.CurrentPage;
mSnapPage = savedState.CurrentPage;
}
catch
{
base.OnRestoreInstanceState(state);
// Ignore, this needs to support IParcelable...
}
RequestLayout();
}
protected override IParcelable OnSaveInstanceState()
{
var superState = base.OnSaveInstanceState();
var savedState = new SavedState(superState)
{
CurrentPage = mCurrentPage
};
return savedState;
}
private class SavedState : BaseSavedState
{
public int CurrentPage { get; set; }
public SavedState(IParcelable superState) : base(superState)
{
}
private SavedState(Parcel parcel) : base(parcel)
{
CurrentPage = parcel.ReadInt();
}
public override void WriteToParcel(Parcel dest, ParcelableWriteFlags flags)
{
base.WriteToParcel(dest, flags);
dest.WriteInt(CurrentPage);
}
[ExportField("CREATOR")]
private static SavedStateCreator InitializeCreator()
{
return new SavedStateCreator();
}
private class SavedStateCreator : Java.Lang.Object, IParcelableCreator
{
public Java.Lang.Object CreateFromParcel(Parcel source)
{
return new SavedState(source);
}
public Java.Lang.Object[] NewArray(int size)
{
return new Object[size];
}
}
}
The code was actually taken from this example in here: https://github.com/xamarin/monodroid-samples/blob/master/ViewPagerIndicator/ViewPagerIndicator/Library/CirclePageIndicator.cs
I have been personally unable to reproduce this but it has come out in crash reporting for our app.
Any tips on this would be appreciated.