Java GPS/Routing access ?

[HRogge]

I have to questions, maybe one of you knows an answer:

1.) Is it possible to access the GPS coordinates from a J2ME programm ?
2.) Is it possible to start the navigation software from J2ME ?

[samr7]

I believe the JSR-179 APIs are restricted to unsigned midlets -- you'd need to get Motorola to sign your .jar in order to use them on the actual phone.

Also, it seems possible that you shouldn't need a "GPS-enabled" phone with the firmware discussed in the other forum in order to use JSR-179. The "strings" output of the JVM application on my A780 with older firmware suggests that JSR-179 is present. There is also a libezxlocation.so somewhere in /usr.

[HRogge]

Is there a way to replace the Motorola Keyring with one that contains my own key ? I'm thinking about buying an A780 but if I cannot write some software for the phone myself I think there will be better alternatives.

[maxx_730]

you can write native sw's for it...

[samr7]

you can write native sw's for it...

There were references to an EZX SDK discussed on CCMOVE a few months ago. Anybody know where it might be found now? That would be really cool to get on xorphan's file server...

[HRogge]

you can write native sw's for it...

C++ and QT-Embedded, right ? Maybe it would be really time to learn something about QT.

Does Motorola provide APIs for accessing the phone/pim/gps from native code ?

[maxx_730]

Moto doesnt provide fuck...

[HRogge]

Moto doesnt provide fuck...

Hmpf...

okay, let me rephrase it... does someone already know how the "not provided" APIs for the A780 work ? What's the use of a programm running on a phone if it cannot access the phones goodies ?

[samr7]

I take it back that you *need* to get midlets signed by Motorola. If you only want to run your own JSR-179 midlets on your phone, and don't mind minor hacking, you can alter the midlet's security domain after installation. Just put the phone in mass storage mode and look for:

.system/java/DownloadApps/MIDletXXXXX/registry.txt

(replace XXXXX with some number, usually 00500 and up)

It will look something like (as an example):

Jar-Path: /diska/.system/java/DownloadApps/MIDlet00502/Files/midpssh-full.jar
Jad-Path:
Perm-Path: /diska/.system/java/DownloadApps/MIDlet00502/permfile.txt
Suite-Icon: /diska/.system/java/DownloadApps/MIDlet00502/Files/MIDlet-1.png
DRM-Mode: Forbidden
Is-Trusted: 0
Jar-URL:
Description:
Domain: untrusted
Signer-Name:
Mot-JavaVM-Heapsize: 822098176
Delete-Notify:
Num-MIDlets: 1
MIDlet-1: MidpSSH, /diska/.system/java/DownloadApps/MIDlet00502/Files/MIDlet-1.png,app.Main

Just change the Domain and Is-Trusted values, and it'll let you do whatever you want.

In the "setup" cramfs image, there is a file called .policy/_devdomain.txt that describes the different security domains and which APIs they have access to. Very interesting.

Writing native apps would still be a lot more fun, where's that SDK?!?