JAD and JAR

[ehabsadany]

Hi all,
I know that:
jad - is just a text file with application parameters
jar - archive with classes

that means JAR can be installed to a mobile device .. so what about the JAD How can i install it and specially if i want to embed inside it a certificate???

so please someone tell me the difference and where can I read about both...

thank you

[balagopalks]

May be this link is of some interest to you.
http://www.onjava.com/pub/a/onjava/e..._3/index5.html

Regards
Gopal

[ehabsadany]

I am sorry but it didnt help that much, please I need someone to give me any information about the security
Thanks in advance

[sphansekar]

hi

the jad security is only helpfull when the game is uploaded via web/wap otherwise it provide only the information in the jar file (jar size, Jar URL,MIDlet-Name,MIDlet-Vendor,MIDlet-Version etc.)

[ehabsadany]

Actually it is not for games but i made an application to access my contacts and it runs perfectly in the nokia emulator and it is installed sucessfully but it don't want to be opened on my mobile so i want to be sure that it is an certificate error or permissions or what??

[Jason Glass]

Dont understand exactly what you are trying to do. You want your app, to be only able to run on emulator, and not on real device?

[juarezjunior]

Hi ehabsadany,

It's not clear what you're looking for but it seems you have doubts related to security (MIDlet signing, etc). You should take a look at this document:

MIDP 2.0: Tutorial On Signed MIDlets v1.1
http://www.forum.nokia.com/info/sw.n..._1_en.pdf.html

Try to detail what your problem is so that people here will be able to provide better answers to your questions.

Hope it helps!

BR

[ehabsadany]

My problem is i wrote a code to access my contacts, when i installed it on my mobile the application is not openning at all... while when I have tried to open my application on the emulator it worked.. so is the problem MIDlet signing ???

Here is my code and it work succesfully on the emulator but it is installed in the mobile and it doesnt open at all ..
======Start of code======
ContactList contacts = null;
try {
contacts = (ContactList) PIM.getInstance().openPIMList(PIM.CONTACT_LIST, PIM.READ_WRITE);
} catch (PIMException e) {
// An error occurred
return;
}
Contact contact = contacts.createContact();
String[] addr = new String[contacts.stringArraySize(Contact.ADDR)];
String[] name = new String[contacts.stringArraySize(Contact.NAME)];
String[] tel = new String[contacts.stringArraySize(Contact.ADDR)];

//if (contacts.isSupportedField(Contact.NAME, Contact.NAME_FORMATTED))
//contact.addString(Contact.NAME_FORMATTED, PIMItem.ATTR_NONE, "Mr. John Q. Public, Esq.");

name[Contact.NAME_FAMILY] = TFfName.getString();

name[Contact.NAME_GIVEN] = TFlastName.getString();
contact.addStringArray(Contact.NAME, PIMItem.ATTR_NONE, name);

contact.addString(Contact.ORG, PIMItem.ATTR_NONE, TFcompany.getString());

contact.addString(Contact.TEL, Contact.ATTR_HOME, TFtelephone.getString());
contact.addString(Contact.TEL, Contact.ATTR_MOBILE, TFmobile.getString());
contact.addString(Contact.TEL, Contact.ATTR_FAX, TFfax.getString());
contact.addString(Contact.EMAIL, Contact.ATTR_HOME | Contact.ATTR_PREFERRED, TFemail.getString());


contact.addDate(Contact.BIRTHDAY, PIMItem.ATTR_NONE, new Date().getTime());


try {
contact.commit();
} catch (PIMException e) {
// An error occured
}

try {
contacts.close();
} catch (PIMException e) {
}

=========end of code============

[Pradeepcg]

hi
A jad file cannot be installed on to the device
JAD is an application descriptor, it will only give the details of the jar(application/game) to the device if installed thru OTA(downloaded thru GPRS).
I don't think the problem with ur code is certificates or permissions.
When the application starts up the device will pop up a window asking u to alllow the java appln to access the device contact list.

[Jason Glass]

it will prompt the user, unless, as I have found, if the offending api being called is located in startApp(), then it has no time to prompt user, and immediately exits the application

are you doing anything such as accessing the PIM information and API's, directly from startApp() method?

if yes, can you move the offending code, so at least your app will launch and stabilize?

and also catch just a regular Exception, in case your not catching the exception being thrown, i.e. all I see you catching is "PIMException" dont the PIM api's also throw securityexception?

[ehabsadany]

Hi
my code is written when i press a command, and i cought every thing, so i dont know what is the problem..
my application is working sucessfully in the emulator

[Jason Glass]

Does your code need to be run in a separate thread? or have you tried putting it in a separate thread.

Are you sure device supports JSR-75 or something similar?

You provided enough code, but if you want to provide a very short midlet that eroors as you say, I will try it on my 6630 for you

[davideikeland]

Does it fail during install or when you try running the application?
Did you package you MIDlet (jar) before transferring it to the phone (Project+Create Package+Package)?

Verify that your phone support the PIM API (JSR-75) as Jason also mentioned.
It has nothing to do with signing the MIDlet.