Caused by: java.io.NotSerializableException: android.os.Handler

Question

I keep getting this Serializable error. Both of my classes implement it. I cant seem to find problem. I have gone through all classes and still cant find the cause. It only happens on older Android version, 2.3 and below. Seems to be working find on 4.0+?

Update

Right this problem is back for me.

This time i get

java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = ....datastructures.model.PortfolioAccount)

PorfolioAccount contrain all GSON object and variables.

and it caused by this

Caused by: java.io.NotSerializableException: android.os.Handler

I have checked all my classes that need to be Serializable, but still cant find nothing. Like before its only happening on old Android OS versions.

can you please post the code of class containing my.app.OverviewFragment ? — dinesh sharma, Jan 16 '14 at 14:02

score 5 · Answer 1 · answered Jan 16 '14 at 15:29

5

I believe that your object has an attribute that is not Serializable. Make sure that your class attributes are all implementing Serializable interface. If this in not the problem, I would recommend to implement Parcelable interface.

answered Jan 16 '14 at 15:29

Corje

158
7

That was the problem, i had to go class by class in the end, and one of them didnt have serializable implemented. – Nabdreas Jan 17 '14 at 09:15

score 1 · Answer 2 · answered Jan 20 '14 at 15:01

I was digging through the code and managed to find one class that didnt have it implemented! Problem is that i share this data between 2 classes and Logcat was throwing error about the class that had serializable implemented and not the other way around!

score 0 · Answer 3 · answered Jan 16 '14 at 14:13

Probabily you're using an exception handling or method call that are not supported by older versions of Android.

Let me make an example:

So some of new Android 4 capabilities are not implenented in Android 2.3 like ImageView.setLayerType. To avoid runtime error simply:

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
   setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}

This approach should be used also with exceptions handling:

} catch (NetworkOnMainThreadException nomte) {
   // log this exception
} catch (SocketTimeoutException socketTimeoutException) {
   // log this exception
}

NetworkOnMainThreadException is not implemented in Android 2.3 so when the class is loaded (and not before!) the exception java.lang.VerifyError occurs during runtime.

Caused by: java.io.NotSerializableException: android.os.Handler

3 Answers3