How can I read data saved with NSUserDefaults in the Apportable version of my app, from a pure Android version?

Question

I'll be updating an old app I'd ported with Apportable to a pure Android version. I want to be able to rescue users' old data.

The old data was a dictionary saved with [[NSUserDefaults standardUserDefaults] setObject: forKey:] I assumed I might find it in the SharedPreferences of Android, but going through the keys in PreferenceManager.getDefaultSharedPreferences(applicationContext) didn't find anything.

I would very much appreciate any pointers.