Re: Cannot create an instance of Location.Criteria class - lapi.jar MIDP 2.0 J2ME
- From: roland.weiersmueller@xxxxxxx (Roland)
- Date: 2 Apr 2005 23:57:19 -0800
"Daniel Dyer" <dan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:<op.sokp1hmy8kxzwp@dougal>...
> On Fri, 01 Apr 2005 21:47:10 +0100, Roland <roland.weiersmueller@xxxxxxx>
> wrote:
>
> > Hello
> >
> > I am trying to find out the good provider for a kind of GPS program
> > written with j2me midp 2.0 using the location API (lapi.jar) and
> > Eclipse development environment with the plugin 'eclipseME'.
> >
> > I have a very strange phenomena.
> > I try to create an instance of the Criteria class which is part of the
> > Location API (lapi.jar).
> >
> > I can compile it without any problems, the program crashes at runtime.
> > My programm crashes with the following error line:
> > java.lang.NoClassDefFoundError: javax/microedition/location/Criteria
> > The lapi.jar is included in the project and the Criteria class exists.
> >
>
> Looks like a classpath problem, is the lapi.jar included in the classpath
> when you run your app? Are you running on an emulator or an actual
> device? You need to configure your emulator or the manifest in your app's
> jar file to include lapi.jar in the classapth.
>
> OK, that's my token attempt to answer your question ;) the real reason I
> replied is because I'm interested in which device(s) are you planning to
> run on? We've been looking at JSR-179 (the J2ME location API) and it
> seems to be almost universally unsupported by current generation mobile
> phones. It seems to require both CDLC 1.1 for floating point support and
> vendor support for the location API on the device (I may be wrong, my
> colleagues have looked at this in more detail than I have personally). I
> presume you are using some kind of reference implementation in an
> emulator? We are targeting Symbian devices and are having to use C++ to
> retrieve location information because of the lack of JSR-179 support. I'd
> be very interested if you've got it working just with Java.
>
> Dan.
>
>
> P.S. Anybody else think there should be a comp.lang.java.mobile group?
Hi Dan
Thanks very much for your answer.
I think you are right, such special functions are not supportet by the
WTK.
I was reading a little bit more in this direction and I realized that
my phone K700 Sony-Ericsson is not supporting at all the Location API.
I wanted to implement this function instead of buying a GPS reciever
(I do not need the position extremly exact ;)
So I decided to stop my little private project and buying a GPS :))
I would be very much interested how you are doing this on Symbian.
Are you using MobiInfo API? Or is there another API which is providing
cell informations?
I am absolutly your opinion about the mobile newsgroup - this area
became so waste and becomes more more important that it would be very
useful to have an own newsgroup.
Best regards
Roland
.
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