Location API (JSR 179) without GPS..

[d33]

Hi

The location API supports several location methods, not only GPS. I'd like to use 'NETWORKBASED' oder CELLID'.
I tried to implement this, but my problem is:
I get a locationProvider instance, but the method getLocation() throws an LocationException. Why?
Has anybody got this to work?

[hartti]

Your operator/carrier needs to provide locationing service for the Location API to work without GPS. Does it?

Hartti

[d33]

Yes, the network operator told me, that their network should support it. But how can I verify this?
Is there a working application using a network based location method?

[d33]

Does anybody have experience with this?

[balagopalks]

Yes, the network operator told me, that their network should support it. But how can I verify this?
Is there a working application using a network based location method?

Here is a sample app that could be of some interest to you.

MIDP: Location API Example - Tourist Route
http://www.forum.nokia.com/info/sw.n..._v1_0.zip.html

I haved tried this earlier on a GPS based phone and worked fine.

Regards
Gopal

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[d33]

thank you for your answer. I have tried the TouristRoute MIDlet. It works fine with GPS, but it doesn't work, if GPS is "temporary unavailable". There is a bug in this MIDlet, because if a location provider is "temporary unavailable", it doesn't check if there are other location providers that are available.

Any other suggestions?

[balagopalks]

Please make sure that your operator provides location for a Java app. Do you know any success cases in your network with a Location API based app working fine?

Regards
Gopal

__________________
MobiQuil.com
An initiative by Developers for Developers.
http://www.mobiquil.com - Alpha - Launched.

[d33]

No, I don't have any working application, that is what I'm asking for .
Even the Nokia sample MIDlet contains bugs.
The network operator states that the network supports location. How can I verify this?
Are there any applications that work with network based location methods? The Nokia sample MIDlet doesn't. (again, because of a bug in the program, not because the network operator doesn't support it).

How can I get a LocationProvider instance that uses the network to determine the position? The Nokia API always uses the GPS, even if it is not available.

[hartti]

You should use null as your location provider criteria. If you do not get a location provider with this when the GPS is not on, then your operator does not provide locationing service

Hartti

[d33]

Thank you for your help.
I do get a locationProvider, locationProvider.getState() returns 1 (available!) but if I use locationProvider.getLocation(500), then I will get a locationException.
What's wrong?

I have tested this with two different networks on a N95 and on a N73. The same problem on both phones.

[d33]

any ideas? Did I do something incorrect or is this a bug in Nokia's implementation?

[d33]

No suggestions? I suppose this is a bug in nokia's API..
How to inform nokia about such bugs?

[hartti]

d33,

I got this answer from the development team:

"The JSR-179 Location API itself does not provide a functionality to support Cell ID positioning but if the native Location Framework in S60 supports Cell ID positioning (i.e has Network Positioning Proxy or several of them) then it is also possible to get the cell ID position information from JSR-179. So the feature depends on the platform configuration."

Hartti

[d33]

Thank you for this information.
Which S60 devices support Cell ID positioning?
How can I request a LocationProvider that is available? LocationProvider.getInstance(Criteria) returns a locationProvider that are either available or temporarily unavailable. But the Problem is that you cannot request a provider that is available.

[d33]

Has anyone got any idea? This location API is quite annoying. Like this, its not usable at all.