JavaRanch Java 2 Micro Edition

Help needed for the Final year project (A Mobile App)

Tue, 13 May 2008 09:11:11 MDT

Hi ,

I am a final year student doing my degree in Computing Specialized in Software Engineering. My final year project is a Mobile application which provides location based information services. Basically this application will be allow the application user to locate himself first and locate important places around him such as hospitals, restaurants and etc. So I am planning to locate the user using GPS(Global Positioning System). In addition I am planning to use the location API in java. To show the important places to the user I thought of using maps. I will have to make use of maps of only one city.

What i want to know is how to (the best way to) process,display and store maps. Hope you will give a good response....

obfuscate package in j2me

Thu, 8 May 2008 04:46:55 MDT

hi all,

i am having a problem in obfuscating package in j2me, i have installed proguard4.2 and in eclipse -->prefereences->j2me->obfuscate-> i pointed the root directory of proguard.

but when i try to create package, its says configure proguard.

i want to know what exactly should be steps to configure proguard.

any suggestions would be helpful.

thanks
geetha

j2me obfuscate package

Thu, 8 May 2008 02:12:55 MDT

Problem while translating Mesh(JSR 184)

Tue, 6 May 2008 22:32:51 MDT

Hi,
I am developing a 3D game. I have a Mesh and I am trying to translate it using the following code:
public void translate(float dx, float dy, float dz)
{
iTM.get(f);
f[3] += dx; f[7] += dy; f[11] += dz;
iTM.set(f);
}
I have also tried to translate using postTranslate() method of transform.
But translation is not smooth, it is translating with some jurk. I have tried with different timer values, ie in Thread.sleep(delay). I have given different values to delay, I have also tried by involving "dt" ie system currenttime-PrevTime. But still it is having some jurk.
If I give a very small amount of translation then it looks good but it translate very slow, I need a fast translation.
It ma...

Launching problem

Tue, 6 May 2008 12:54:50 MDT

I have a following problem with running/deguging midlets.

If I try to run or to debug midlet(HelloWorld.java), it will throw Error Launching window "Filename, directory name or label package is invalid."

Could you help me, please.

----------
Win XP SP2
JDK 6
Sun Java Wireless Toolkit 2.5.2 for CLDC
Eclipse 3.2
EclipseME 1.7.9

Mobile answering Machine

Tue, 6 May 2008 07:08:49 MDT

Hello all.. I am trying to create mobile answering machine in J2me..
I was able to record and play normal voice using MMAPI.. Now, I want to know how to receive call by the application and record the other person's voice.

Checking Java Telephony API but have read that no phones currently support it... so is it true? if yes, what are the alternatives?

Problem with nokia S40 series

Tue, 6 May 2008 05:40:49 MDT

Hi everyone.
I have developped an application for mobile banking ...
The problem is it works fine on any SonyErricson and nokia phones except nokia S40 series .

The error is : Out of memory error

I cash images into ram at startup (in an array of Images exactly 150 images ) everything goes fine except S40 that stops loading images to memory with the mentioned Exception !
I use the memory profiler and it shows that the maximum JVM used ram is about 240kb and I know the spec for the phone I'm testing the app on it (Nokia 5310) has a limit of 2mb heap size.

what do you suggest???

Possibility to run a midlet in back ground

Sun, 4 May 2008 23:54:36 MDT

Hi all,

Is there any possibility for running a midlet in the background.
if so, how can i start that app while phone is turned on.
again how to get the control back to my app.

thanks in advance

design parttens for j2me

Mon, 28 Apr 2008 13:58:16 MDT

hi anyone let me know design parttens for j2me ,
the best pratices and other suffs . I searched on the google but i
unable to find anything .

I mean anything leagal . Oky .
I mean ~leagal oky ! he he !

display.setCurrent() --- switchDisplayable() Difference???

Mon, 28 Apr 2008 10:20:15 MDT

i guess both methods are doing same thing if im not wrong.

can anyone tell me the difference between these two?

Alert Problem - polish.css will work or AlertType will work??

Mon, 28 Apr 2008 10:18:16 MDT

i want to show my Alert but when it appears it covers whole screen.
but i want to show it in only 30% part of screen as we normally getting.
But i am not able to do that.

i used AlertType.[AllPosibleStaticVariables]
but still getting full screen.

can polish.css can help because application is in J2ME polish.

Sony(Works Fine) Nokia(Can't Even Connect To Server)

Mon, 28 Apr 2008 10:14:15 MDT

I have one application which works fine with sony and fetches result from server.and shows result correctly , everything is just fine.

But when i install and run same application in Nokia It does'nt Work and comes immediately after login and i think its not even connecting to server.

i can't understand why its happening.
Anyone having any idea.
Any???

Java ME and SCMAD study guides

Mon, 28 Apr 2008 05:50:15 MDT

Hi.

Below is a link to a study guide I wrote some time ago when studying to SCMAD. There's an eclipse workspace with API-usage samples, and a study guide/presentation.

http://taxista.googlepages.com/ (http://taxista.googlepages.com/)

If you find any error, please report to taxista at gmail.

Thanks,
Eduardo.

calculate with dates

Sun, 27 Apr 2008 01:40:11 MDT

I want to have 2 dates on a midlet but it seems that it das not work.
the java code that I want to translate to a Midlet is this.
GregorianCalendar day = new GregorianCalendar();
GregorianCalendar back = new GregorianCalendar();
back.add(Calendar.DATE, -35);
Date d = day.getTime();
Date e = back.getTime();
DateFormat A = DateFormat.getDateInstance(DateFormat.LONG);
DateFormat C = DateFormat.getDateInstance(DateFormat.LONG);
String B = A.format(d);
String T = C.format(e);
whats wrong.

Mobile service provider simulator

Sun, 27 Apr 2008 01:04:11 MDT

I am in need of a mobile service provider simulator for some testing purposes. If any of you are aware of a good simulator please let me know.

Thanks in advance.

swt.custom.sashform

Wed, 23 Apr 2008 05:45:59 MDT

Hi there,

Has anybody used SWT sashform on pda

I mean if there support for swt.custom.sashform for PDA

Thanks in Advance

Regards
Paraakaram

Need a to solution, anybody help

Tue, 22 Apr 2008 17:23:47 MDT

1. Implement the square root function using binary search
(DO NOT USE Math.sqrt() OR ANY OTHER Math function except abs()).
NOTE: THIS CODE SHOULD USE BINARY SEARCH, NOT NEWTON's METHOD!
(if you copy code from the web it is likely to be Newton's method, in that case you will not get credit for this problem)
The answer should be accurate to at least 4 decimal places (
public static double mySqrt(double inp){ . . . }

2. Write a function to count the number of times each word appears in some English text.
(The words are separated by white spaces.)
Then print out each word in alphabetic order (you may assume that this is the same as the natural ordering of the String class), and how many ti...

price of J2ME game programming

Tue, 22 Apr 2008 16:31:46 MDT

Hi, I am new here
I�m considering about making j2me game for cell phones. I am not sure if this will be freeware or if this will be worth to try to sell it. I never made any game before, so Im not experieced in this. But I am professional 3d and 2d artist and also game player

I want to ask how much could it cost to make programming for simple adventure game (something like silent hill for cell phones, but with no monsters and with more riddles)? I mean I am not programmer and it is hard for me. So I am asking if I will pay someone for programming game like this, how much will it cost (approximately)...

thanks!

Offline PDA syncing ??

Mon, 21 Apr 2008 03:26:18 MDT

I have a web application which does some financial data operations. The web application runs on intranet and is built in J2EE(Struts framework).
Now, there is a new requirement. The client wants that the application should run on a PDA while an agent is on road and should be able to update local database in PDA while on field. When he returns he should be able to connect the PDA to a system and sync his data with that on server. Basically, the updates he makes should be reflected on server.

Now, Is this possible(basically that offline syncing)? Also, what changes would the application require to run on PDA. Will I require to redevelop it in J2ME(Don't know much about it)?

If, it's feasible then what PDA is best...

Getting started guide

Thu, 17 Apr 2008 11:52:18 MDT

Could somebody point a good getting started guide on JMED for personsw ith some Java background? Specifically I'm interested what version of JDK I should use to compile, is any byte code difference, where to get compatible RTE libraries, how to package, how load and run, how debug, ship and sell.

What are Midlets

Thu, 17 Apr 2008 05:12:18 MDT

Hi,

I am new to J2ME

Just a few questions to ask?

1. Is any java application which is run on midp2.0/cldc1.1 called Midlet

2. If the above is correct, what is the correct way to create a application jar or Midlet.

3. what is the role of .jad and .crt files and are they necessary to deploy the application on pda/emulator

4. how can we create .jad and .crt files for the application jar, are there any tools available.

5. How do I deploy the application on emulator, I am using J9 as jvm here
and have created the J9/MIDP20/ Folders under Program Files and copied bin, lib and examples folder from the J9 which got installed on my PC to Emulator

6...

Deploying Appliation on Emulator with WM5, using J9 JVM

Thu, 17 Apr 2008 04:50:17 MDT

Hi,

I deveeloped a client sever application for PDA to share files with the server using wi-fi

My client side is in SWT,

A quick List of facts
- The application has been developed against J9, on Eclipse.
- I am trying to test the application on EMULATOR with J9 for WM5 Installed on it.

What I have done till now
1. The code works fine on development platform.
2. On the emulator, I was able to find J9 for WM5, but I am not sure if it is correct.According to the installation file, which came with J9, I have run the sample example which came with the J9 using emultor.exe. The example runs fine, I have tried to follow the same path using emulator.exe to run my applicat...

Need Cool IDeas For my Final Yerar Project

Thu, 17 Apr 2008 02:49:30 MDT

Hi
I'm doing Software engineering degree and starting my third year in this may.So i have to do a individual final year project.So i have some ideas but i thought they are too simple for FYP.I'm interesting in to develop a mobile application.So i need your guys ideas then i can choose one.Hope I'll get lot of ideas.
Thank u

Special character question...

Wed, 16 Apr 2008 11:37:01 MDT

Does anyone know how I can get this character...

└

...to appear on a mobile device. At the moment, it comes out as a question mark.

Cheers,
James

Multiple message connections problem

Wed, 16 Apr 2008 08:59:01 MDT

hi,
I want to have two message connections (wmapi 2) in one midlet. In specification is written that i can have multiple MessageConnections open simultaneously.
I CAN open two message connections (no exceptions) and connection, that I opened first works fine. But when I am trying to use send() method on a second connection IOException is thrown /Connection closed/. Both connections are opened and run in different threads.
Any ideas?
Thanks a lot.

Multiple message connections problem

Wed, 16 Apr 2008 03:57:00 MDT

HTTP Post on UMTS stops

Tue, 15 Apr 2008 09:52:58 MDT

Hi there I modified the code from this thread (http://) to suit the needs of J2ME:

code:


 
package some.package.util.http;
/*
 
 * Original source code: http://forum.java.sun.com/thread.jspa?forumID=256&threadID=451245 (http://forum.java.sun.com/thread.jspa?forumID=256&threadID=451245)
 
 * This source was adapted to meet the requirements of J2ME
 
 */
/**
 * @author tb
 */
 
import java.io.*;
import java.util.Enumeration;
import java.util.Vector;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.io.file.FileConnection; 
 
/**
 * &l...

Verification error on Blackberry 8100

Tue, 15 Apr 2008 09:18:58 MDT

Hi,
I'm new to blackberry development and please forgive me if this is a very dumb question.
When I start the app on the device pearl 8100, I get "Error starting appname: Module 'appname' has verification error 2124 at offset 1841". I have looked at the known issues from Blackbery which links this error to setting the Midlet as private. But my midlet has public access. I have also searched in google and have not found any answer to this error. Can anyone please help me?

If I run the app on the emulator, I get JVM error 104: uncaught exception and then when I say continue, it gives the same verification error as above.

thanks,
RS

Why deleted project is showing up in sun java wireless toolkit?

Tue, 15 Apr 2008 04:37:20 MDT

Hi..i am using sun java wireless toolkit for cldc.I deleted the project folder from application folder but the project is still showing up in toolkit and when I created new project of same name and execute the project after building it.It was running acoording to the old deleted version?Can anybody tell me what is the problem?

Thankyou

Need Cool IDeas For my Final Yerar Project

Tue, 15 Apr 2008 03:43:19 MDT

Hi
I'm doing Software engineering degree and starting my third year in this may.So i have to do a individual final year project.So i have some ideas but i thought they are two simple for FYP.I'm interesting in to develop a mobile application.So i need your guys ideas then i can choose one.Hope I'll get lot of ideas.
Thank u