Database Users

Java Midlet Question

I really want to use a name picker (randomly picks a name from a pre-defined list)
Google reveals this java version is exactly what I need for a desktop
Is there any way I can use it on the pocket pc (does not work in midlet manager)
http://www.davebsoft.com/jaws/apps/namepicker.jnlp

You normally need a jar version of the program to work with midlet manager - best you do a search for a jar version.

The author kindly sent me his JAR file for this app. I have placed it onto my device but cannot open it
Is it incompatable or am I making a silly mistake
Thanks
Hays

Is that the zip he sent you or did you send you a jar file? Even when i rename it namepicker.jar it wont install, i am sure there is something wrong with the file.

Is that the zip he sent you or did he send you a jar file? Even when i rename it namepicker.jar it wont install, i am sure there is something wrong with the file.

he sent this text in his email
The jar file is here, but it probably isn't set up the way you need it:
http://davebsoft.com/jaws/apps/lib/namepicker.jar
I downloaded it but can't get it working

yep - still says invalid - contact the author again he must have a valid jar that works

will do
thanks for your help

the author replied
"invalid" in what context? It's valid in the context in which you've been
running it on your PC or whatever. Maybe it lacks a manifest file or
something. There are free tool to extract and rebuild jar files.

The message it gives is that it has an 'invalid java application desciptor' i.e. the jad part of the jar is wrong.

just a guess, but its probably made for jave for desktops, not j2me.

OMG. The Java that is written is for PC (or eqv) Java not for Java for phone (eg. midlet). That's why it doesn't run. Midlet is a very small subset of the real Java, the code is different, and there isn't much function in midlet version of java, and it is a pain to program in midlet-java (whatever you call it). Hence the JAR is not working. Try running it on your PC, it will work.
No, you can't extract it and run it on your midlet-enabled phone. No, even if you have the source, you can't do that either, unless you translate the code manually. I don't think there is a converter for that matter, especially it involved GUI.

That explains it
Anyone up for the challenge of writing a good pocket pc version ??
Hays

Try this one...
This is an OSS JVM that's meant to be J2SE compliant so it might just run. Try your luck.

[Q] Write DLL Resource file in Visual Studio

Hi,
I have Visual Studio 2005 and i want to create a DLL that includes resources like Icons and bitmaps, so i made one and tried to compile and create the DLL (Used C++) and it gives me the error error LNK2001:.....
I thought that i must use ARM Platform or Pocket PC, because on the Project Properties is Win32 set as Platform!
Sorry i never used Visual Studio ;-)

yes if you want to compile it for pocket pc, you got to change the platform
if you only got win32, maybe you didn't install the windows mobile SDK (you will find it in microsoft website, wm6 is the lastest i think)
you got to install it, then you choose the WM platform before compile

WM6: start Java app from C++ app?

Hello,
I'm currently in the need to code a C++ app under Windows Mobile 6 that starts an installed Java app. I already hoped that call system("java java_app") might work, but my C++ compiler (VS 2005) does not even know system() function. And I don't think it would work this way: to install a Java app, I start a .jar file, and then, I can start the app manually via start menu under Start -> Program Files -> Tools -> Java, where I can select from all installed Java apps, and obviously, the installation does not create .jar or. class files anywhere in the file system. The Java runtime environment on my phone (HTC Diamond) is an Esmertec Jbed.
Thanks for any help.

As far as I could find out, Java apps under Jbed JVM can be started from command line by
\windows\jbed.exe -run sX_
where X=0,1,2,3,... ist the index of the desired app in the list of installed Java apps. So, Java app can be started from C++ programm using ShellExecuteEx(), filling the lpFile member of the SHELLEXECUTEINFO parameter with "\\windows\\jbed.exe" and lpParameters member with "-run sX_".
Very nice, so far, however, there are two troubles remaining:
- the index X of the desired Java app depends on the sequence, in which the Java apps have been installed
- the Java midlets have a hierarchical structure. A midlet might contain several sub-midlets, but only the highest-level midlets are accessable by the s-index

Well, I think the hierarchical structure is a solvable problem, the desired midlet can be installed as a top-level midlet. But still the index problem. Is there maybe a registry entry that maps midlets to indices?

I found the solution!
Jbed stores for each installed midlet a sX_.jah, sX_.obj and a sX_suite.utf file in \windows\appdb folder. The .jah and .obj are binary files, but the .utf files are readable text files that contain some information of the corresponding midlet, that enables one to identify midlet from index X. So, all I need to do in my C++ app is to open the .utf files subsequently and to check if I find the information that identifies the desired midlet.

Disassemble or Reverse Engineer WM 6.5 dll

Can anyone suggest tools/utilities that would allow me to disassemble a WM 6.5 dll to reveal it's methods and parameters? In .net desktop world I can use tools like Reflector to do this, but I seem to be having difficulty doing this on WM apps.

Unregister dll - EDiT - Register dll
Here two threads discussing Developer tools & Kitchen Utilities for (ROM) Chef's;
Kitchen Utensils
60 Universal Tutorials for Customizing any Device and Cooking
Have fun, develop something nice for free and please do it here on xda-developers

There are a lot of ifs and buts to this but here goes:
If the dll was created as a .NET app, then reflector should be able to list the code within it, as it will contain the MSIL code within it. If it has been run through an obfuscator when it was built, this can mangle some of the internals and give Reflector a bit of a hard time.
Otherwise it will be a Win32/MFC/ATL object containing ARM object code. A DLL file is the same format as an exe file i.e. Microsoft's PE (Portable Executable) format. Microsoft's DUMPBIN, part of Visual Studio, (run it from the VS Command Prompt), is able to dump out the EXPORT table which lists the public functions visible in it.
There is a freeware ARM dissassembler , CHARMED, which can run on your device which can display the ARM assembly code, but to make any sense out of it, you will require a pretty good knowledge of the ARM instruction set and basic knowledge of how compilers work. If you don't know what a stack frame is, you'll struggle.

Providing a link to chARMed and C/P from that page
stephj said:
There is a freeware ARM dissassembler , CHARMED, which can run on your device which can display the ARM assembly code, but to make any sense out of it, you will require a pretty good knowledge of the ARM instruction set and basic knowledge of how compilers work. If you don't know what a stack frame is, you'll struggle.
Click to expand...
Click to collapse
Here is the link for this nice freeware ARM dissassembler;
http://sites.google.com/site/naphos/software
Requirements: Windows 98,Me,2000,XP Size: 246kb Description: ABOUT ChARMeD:
ChARMeD is a Windows Mobile / Pocket PC / Win CE (for ARM CPUs) Disassembler and Assembler
The name ChARMeD stands for:
Carolo's Hexadecimal ARM Editor and Disassembler
FEATURES:
· Disassemble a Windows CE Executable for ARM CPUs.
· Assemble instructions in ARM Assembler.
· Upload modified file to Windows CE Device.
· View MZ and PE Headers of executable.
· View Import Table of executable.
ASSEMBLER:
· Added NOP instruction 0x90909090, which is not part of the ARM instruction set, but nevertheless works because it is an undefined instruction.
· Supports all no operand instructions, Branches (Jumps) and instructions with two registers as operands.
DISASSEMBLER:
· Recognises 0x90909090 as NOP (see ASSEMBLER above)
· Supports all no operand instructions, Branches (Jumps) and double operand instructions.
ARM Classic Processors
ARM Infocenter

I think IDA is standard for this kinda reversing. If you can find a location where the DLL is called from in another app, you should be able to quickly identify at least the number and format of the parameters. Obviously you can also refer to the import/export tables for this.
V

Awsome bits of info to get me started ... thanks!!

Is a DLL signed?
And if it is, how does one know it? I use a tool from sysinternals called Sigcheck
Sigcheck
Verify that images are digitally signed and dump version information with this simple command-line utility.
One way to use the tool is to check for unsigned files in your \Windows\System32 directories with this command:
Code:
sigcheck -u -e c:\windows\system32
Though there are way more options than the example above.
As all reverse engineers/hackers or cooks you too should investigate the purpose of any files that are not signed.
Besides some nice sysinternals standard utilities, there's also;
SystemInternals_Suite
For obvious reasons I'm using not a direct link to the Suite. Therefore you need to click on it (on the left) yourself. There's a load of useful utilities there waiting to be downloaded by (would be) developers, power users and system / network administrators (are we not all).
If it is signed with a signature; you need to unsign it before editing it!
It's dead easy.
1) Copy your DLL from your phone to your PC. You may need to use ROMExtractor to do this if you have problems.
2) Unsign it using Unsigner. To do this download Unsigner and the Unsigner batch file here. Copy Unsigner, the Batch file and the dll from the phone to one directory and run the .bat file. It should tell you that the certificate has been removed.
3) Download Reshack
4) Open the dll from the phone using Reshack or the better not free PE Explorer
5) Do your editing.
6) Click Compile String at the top and then save the file.
7) Download Ssigner. Launch it and use Select File to select the DLL file you've just modified. Click Start Sign Process! When it's done check the text file that's created to make sure it signed properly.
8) Copy the file back to the Windows directory on the device using for PPC/handheld/CE free Total Commander. If necessary Reboot.
Kitchen Utils Reviewed gives links to programs a developer / cook needs!
Have fun edtinig, vewinig ,bwroisng, assilimating, copamirng and itengaritng your files,
o/~

{HOWTO} Create or Edit widgets

Hey there,
This is a tutorial to show ya' how to create or edit widgets for your Bada-powered Samsung Smartphone.
Download this this, first of all:
"Eclipse IDE for Java EE Developers "OR "Eclipse IDE for Java Developers".
http://www.eclipse.org/downloads/
Download the attached Guideline.
Go upto page no. 8 in order to know about the steps to install Samsung Mobile Widget SDK.
To create and package widgets, refer page-14 to 32
For people wanting to edit their existing widget, refer to page no. 42
PS-i) Just download JRE (Java Runtime Environment) if youa re not able to get into Eclipse
ii> It does not matter if you download eclipse EE or only eclipse
iii> If editing an existing widget,delete the 'Signature.xml' in the eclipse directory,else it won;t package the file and you will get a installation error on your phone.
iv> I am just a beginner to this thing...So don't expect more from me!
v> If you found this post to be useful...Don't forget teh thanks button!

Update 1- Some widgets of Bada 2.0 can not be edited..You can only create new widgets for 2.0!

Reserved!!!