Android18Instantiator Fails On Android O

[erandagan]

It seems that Android18Instantiator does not work on Android O beta (SDK level 25).
Looks like Android dropped support for ObjectStreamClass.getConstructorId

Caused by java.lang.UnsupportedOperationException: ObjectStreamClass.getConstructorId(Class<?>) is not supported on SDK 25
       at java.io.ObjectStreamClass.getConstructorId(ObjectStreamClass.java:2294)
       at java.lang.reflect.Method.invoke(Method.java)
       at org.objenesis.instantiator.android.Android18Instantiator.findConstructorIdForJavaLangObjectConstructor(Android18Instantiator.java:72)
       at org.objenesis.instantiator.android.Android18Instantiator.(Android18Instantiator.java:39)
       at org.objenesis.strategy.StdInstantiatorStrategy.newInstantiatorOf(StdInstantiatorStrategy.java:96)
...

[henri-tremblay]

They love to make my life complicated. :-) Thanks for reporting. I will look into it. The fix should be out soon.

[henri-tremblay]

@erandagan Stupid question. I'm looking for the Android O SDK and system image to run with AVD. Can you help me?

[erandagan]

@henri-tremblay Sure, I'll see if I can find it. I got the stack traces from my app's users who installed the O Beta on their devices.

[westnordost]

The Android O System Image for the Android Emulator is listed in the SDK manager under Android O Preview as Google APIs Intel x86 Atom System Image. But only for the Android Studio 3.0.
See https://developer.android.com/preview/migration.html#pct

If you have Android Studio already installed, you can change to the canary channel to (probably?) update to 3.0. See https://developer.android.com/studio/intro/update.html##sdk-manager

[henri-tremblay]

Thanks. I was using the Android plugin on IntelliJ Ultimate. Always disappointing to see that there are so much things missing in it. But yes, using Android Studio Canary made it appear. So I'm almost there now.

[henri-tremblay]

I just realized something. You are not supposed to use Android18Instantiator anymore. Latest Android versions (N and O) are based on the OpenJDK and so are using the UnsafeFactoryInstantiator. This is the one StdInstantiatorStrategy will give you.

So I just tested it on Android O and it works perfectly.