On Aug 3, 2012, at 7:23 AM, Andrew Sinclair <[email protected]> wrote:
> I haven’t upgraded Mono for Android since 4.0.4, it’s been a nice stable
> version for me. Now I’ve come across a problem on a device and an emulator
> running Android 4.0.4.
As a reminder, there is no binary stability between 4.0.4 and 4.2. You will
need to rebuild your entire app and all libraries. (However, your issues
doesn't look like it's a problem due to ABI incompatibility...)
> The error is pretty much on start up:
>
> 08-03 10:53:44.792: I/MonoDroid(797): UNHANDLED EXCEPTION:
> System.NotSupportedException: Unable to activate instance of type
> Java.Lang.IRunnableAdapter from native handle 412ce190 --->
> System.MissingMethodException: No constructor found for
> Java.Lang.IRunnableAdapter::.ctor(System.IntPtr)
Your exception looks like (and can be induced by) premature Dispose() calls:
calling Dispose() when Java still holds a reference to your C# instance and
Java will be invoking methods on that instance in the future:
http://docs.xamarin.com/android/advanced_topics/architecture#Premature_Dispose()_Calls
Or it's a GC bug; we've been fixing actual (and theoretical) GC issues for
quite some time...
I would suggest first looking at your `using` statements or explicit Dispose()
calls to see if they're sensible.
- Jon
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