Oooooh nice! I will try this out. I really appreciate the help and
time you put into this!
On Tue, Jan 10, 2012 at 5:08 PM, Jonathan Pryor <j...@xamarin.com> wrote:
> One of these days we'll get the JNI doc published which discusses many of
> these issues.
>
> In the meantime...
>
> On Jan 10, 2012, at 4:58 AM, Tomasz Cielecki wrote:
>> My guess it has something to do with my implementation of my
>> GetNotifyHandler.
>
> Not GetNotifyHandler(), but n_Notify():
>
>> static void n_Notify(IntPtr jnienv, IntPtr lrefThis, String a)
>
> What's going on is a "reverse P/Invoke": you're creating a delegate
> (`cb_notify`), which is passed to native code (Dalvik), and the delegate is
> invoked. This means that you need to stick to types that the P/Invoke
> marshaler knows about.
>
> In this case, the P/Invoke marshaler will see a `string` parameter, assume
> that it's a UTF-8 `const char*` value, and behaves accordingly. However,
> that's not what the parameter will be, it'll be a java.lang.String instance,
> which the P/Invoke marshaler knows nothing about.
>
> The solution is to manually marshal things:
>
> static void n_Notify(IntPtr jnienv, IntPtr lrefThis, IntPtr native_a)
> {
> ManagedAccessControlJavascriptNotify __this =
> Java.Lang.Object.GetObject<ManagedAccessControlJavascriptNotify>(
> lrefThis, JniHandleOwnership.DoNotTransfer);
> Java.Lang.String a =
> Java.Lang.Object.GetObject<Java.Lang.String>(
> a, JniHandleOwnership.DoNotTransfer);
> __this.Notify (a);
> }
>
>> What happens if the Javascript interface wants to pass a Java.Lang.String to
>> the managed code and the Action there has the type System.String.
>
> Convert the Java.Lang.String to a System.String by using
> Java.Lang.String.ToString(). :-)
>
> - Jon
>
> _______________________________________________
> Monodroid mailing list
> Monodroid@lists.ximian.com
>
> UNSUBSCRIBE INFORMATION:
> http://lists.ximian.com/mailman/listinfo/monodroid
--
Med Venlig Hilsen / With Best Regards
Tomasz Cielecki
http://ostebaronen.dk
_______________________________________________
Monodroid mailing list
Monodroid@lists.ximian.com
UNSUBSCRIBE INFORMATION:
http://lists.ximian.com/mailman/listinfo/monodroid
