Ah, no that's not a bug :)
You likely have "using System;" on top of your source and that binds
"Object" class to System.Object type. Unlike "java.lang" package for
Java compilers, C# compiler does not import "Java.Lang" by default, so
you have to explicitly write "using Java.Lang;" .
However, if you do that, C# compiler will error it out because "Object"
name is now ambiguous between "System.Object" and "Java.Lang.Object".
So, you will either have to give up using "using" statement or add
explicit declaration that "using Object = Java.Lang.Object;" .
Atsushi Eno
> So the OverlayItem is having the using Java.Lang; in the top of the
> file and is implementing Object, but then the compiler thinks it is
> System.Object rather than Java.Lang.Object. I guess this is a bug that
> you will have to correct.
>
> Meanwhile I am just using
>
> protected override Java.Lang.Object CreateItem(int index)
> {
> return overlayItems.ElementAt(index);
> }
>
> Which seems to work fine.
>
> I have created a bug report: http://bugzilla.xamarin.com/show_bug.cgi?id=2358
>
> On Tue, Dec 6, 2011 at 11:55 AM, Atsushi Eno
> <[email protected]> wrote:
>> Yes, as the error message tells, it must be derived from Java.Lang.Object.
>>
>> Atsushi Eno
>>
>>> Is this because Overlay item is inheriting from System.Object rather
>>> than Java.Lang.Object?
>>>
>>> public class OverlayItem : Object
>>>
>>> On Tue, Dec 6, 2011 at 9:45 AM, Tomasz Cielecki<[email protected]>
>>> wrote:
>>>> I get the same error even if CreateItem returns OverlayItem. So
>>>> something is wrong somewhere.
>>>>
>>>> On Tue, Dec 6, 2011 at 9:43 AM, Tomasz Cielecki<[email protected]>
>>>> wrote:
>>>>> OK. About that OverlayItem. I have a Custom overlay item which looks like
>>>>> this:
>>>>>
>>>>> class NMTOverlayItem : OverlayItem
>>>>> {
>>>>> private float[] color;
>>>>>
>>>>> public NMTOverlayItem(GeoPoint point, String title, String
>>>>> snippet, float[] color)
>>>>> : base(point, title, snippet)
>>>>> {
>>>>> this.color = color;
>>>>> }
>>>>>
>>>>> public float[] Color
>>>>> {
>>>>> get { return color; }
>>>>> }
>>>>> }
>>>>>
>>>>> Now in the itenized overlay I have the CreateItem method:
>>>>>
>>>>> protected override NMTOverlayItem CreateItem(int index)
>>>>> {
>>>>> return overlayItems.ElementAt(index);
>>>>> }
>>>>>
>>>>> I get the following error:
>>>>>
>>>>> 'NSPublic.AndroidClient.NMTItemizedOverlay.CreateItem(int)': return
>>>>> type must be 'Java.Lang.Object' to match overridden member
>>>>> 'Android.GoogleMaps.ItemizedOverlay.CreateItem(int)'
>>>>>
>>>>> Any ideas as to why this is happening?
>>>>>
>>>>> On Mon, Dec 5, 2011 at 6:52 PM, Tomasz Cielecki<[email protected]>
>>>>> wrote:
>>>>>> Awesome, will give it a go tomorrow :-)
>>>>>>
>>>>>> As always good job on the new release!
>>>>>>
>>>>>> On Dec 5, 2011 5:38 PM, "Jonathan Pryor"<[email protected]> wrote:
>>>>>>> On Dec 5, 2011, at 11:25 AM, Tomasz Cielecki wrote:
>>>>>>>> Due to changes to how sensors work, i.e. stuff being moved into
>>>>>>>> SensorTypes the samples on GitHub do not work anymore.
>>>>>>> Changes needed to get the samples working with the new release were done
>>>>>>> on the release-2-0 branch, which was just merged to master ~10 minutes
>>>>>>> ago.
>>>>>>> Please update your repo and see if that fixes it. :-)
>>>>>>>
>>>>>>>> Also there has been some changes in the ItemizedOverlay now having the
>>>>>>>> CreateItem method registered, but it needs to return a
>>>>>>>> Java.Lang.Object, does that mean that my custom OverlayItem has to
>>>>>>>> inherit from Java.Lang.Object? I thought OverlayItem was already a
>>>>>>>> Java.Lang.Object?
>>>>>>> OverlayItem inherits Java.Lang.Object, so your class inheriting from
>>>>>>> OverlayItem will also inherit Java.Lang.Object, just not directly.
>>>>>>>
>>>>>>> Subclassing OverlayItem is fine (and required, iirc).
>>>>>>>
>>>>>>>> Is there a list of changes made in the newest release somewhere?
>>>>>>> http://android.xamarin.com/Releases/Mono_for_Android_4/Release_4.0.0#API_Changes
>>>>>>>
>>>>>>> - Jon
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> Monodroid mailing list
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>>>>>
>>>>> --
>>>>> Med Venlig Hilsen / With Best Regards
>>>>> Tomasz Cielecki
>>>>> http://ostebaronen.dk
>>>>
>>>> --
>>>> Med Venlig Hilsen / With Best Regards
>>>> Tomasz Cielecki
>>>> http://ostebaronen.dk
>>>
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