[ZaBlanc]

I am getting so frustrated. My code works fine on the emulator, but when running on an actual Nextel 7520, it fails. Here is my code:

public class GeoPointLocator {
public static GeoPoint locate() throws Exception {
// keep testing the hardware until we get a good result
while (true) {
Criteria cr = new Criteria();

// cr.setSpeedAndCourseRequired(true);
// cr.setHorizontalAccuracy(Criteria.NO_REQUIREMENT);
// cr.setPreferredPowerConsumption(Criteria.NO_REQUIR EMENT);

LocationProvider lp = LocationProvider.getInstance(cr);

if (lp == null) {
return new GeoPoint(0.0, 0.0, 0);
}

Location l = lp.getLocation(-1);

Coordinates c = l.getQualifiedCoordinates();

if (c != null) {
double latitude = c.getLatitude();
double longitude = c.getLongitude();

return new GeoPoint(latitude, longitude, 0);
}
}
}

It dies at the bold line. I am running this code within a thread. The 7520 OS is at v4.1.0.273

HELP!

[knezek]

Originally Posted by ZaBlanc

I am getting so frustrated. My code works fine on the emulator, but when running on an actual Nextel 7520, it fails. Here is my code:



It dies at the bold line. I am running this code within a thread. The 7520 OS is at v4.1.0.273

HELP!

You need to upgrade to 4.1.0.359 or higher before gps works on 7520.(I'm at 4.1.0.380 currently)

If you check your emulator, it's probably running 4.1.0.359, which was the first to support jsr 179(location).

[ZaBlanc]

Silly question...how do I upgrade the OS?

[Skipper_Joe]

This is not true, JSR179 is supported since 4.0.2 at least.
My guess is that you need to sign your application. What exactly exception is thrown in bold line?

[ZaBlanc]

It IS true the app is not signed, however. I don't get any exception saying as such. I can't get a good handle on the error...I get LocationException. Can't extract any more info. It fails immediately.

What error would you expect if it wasn't signed?

[Skipper_Joe]

I would expect SecurityException.
So it looks like it really can't get LocationProvider for some reason. Can you get exception's message? Is it possible your Nextel data plan is not enabled? Or you are not in coverage?

[ZaBlanc]

GPS does work on the device with the other apps.

[Skipper_Joe]

and what is exception message? Can you just catch this exception and print ex.toString() to debug output?

[knezek]

Nothing in your code needs to be signed, and you don't need a data plan to use the gps functionality. I have working gps apps that I wrote on a 7520 with no service at all that work just fine.

I do know however that they did not work until I upgrade my os. Skipper is right about the gps being supported before 4.1.359, but not with JDE 4.1 at least from my experience....

Here's the link to update your OS:

https://www.blackberry.com/Downloads...B9D5EE16489088

Just pick 7520 from the list.

[Skipper_Joe]

I have application working with GPS under 4.0.2 OS with 7520.

Knezek, can you tell in more details how it works without network? This is very interesting to me: I tried to run GPS on 7520 outside US (thus no Nextel coverage) and it fails (either native GPS widget or my own app), though I have valid sim card.

[knezek]

Originally Posted by Skipper_Joe

I have application working with GPS under 4.0.2 OS with 7520.

Knezek, can you tell in more details how it works without network? This is very interesting to me: I tried to run GPS on 7520 outside US (thus no Nextel coverage) and it fails (either native GPS widget or my own app), though I have valid sim card.

You only need network coverage if you are downloading something, i.e. maps. My app is a distance calculator that works standalone thus does not need a network connection.

[ZaBlanc]

I'm using JDE 4.1 so I will try to upgrade the OS first. Judging by the API in JDE 4.1, the API isn't locked. And I'm not about to spend $100 to find out for sure. if the OS upgrade doesn't work, I will jut keep hacking I guess.

Thanks!

[tclark]

just curious you are using a cr
LocationProvider lp = LocationProvider.getInstance(cr);

what happens if you dont use a cr
eg
LocationProvider lp = LocationProvider.getInstance(null);

This code works for me on a full fleet of courier drivers using 7520 for delivery dispatch