UnsatisfiedLinkError, zayit, libzayit.so, wtk, linux

[Fernando Gomes]

Hi,
Does anyone know how to enable native code under Linux version of WTK2.1 ?
It seems WTK2.1 cannot call a native code method inside libzayit.so.
I have already checked libzayit.so and the method I need is really there.
I've read that you have to define LD_LIBRARY_PATH to point at libzayit.so.
I also ready that -Xbootclasspath/a:/my-wtk-path/bin is need in order to libzayit to be found. I've tryed many "flavors" but it's not working.
I know JNI is not supported under MAC/OSX and I'm afraid that JNI is not supported under Linux too!
Below you can see my method, the error I got and my java.sh script I run inside my profile.
Thank you in advance
Fernando Gomes
[e-mail]
mobile:[phone]

ElementClass.java
-----------------
protected void parseImages(XmlReader xr) throws IOException, ParseException {
do {
// parse optional images identified by <IMG>
XmlUtils.requireTag(xr, XmlUtils.tagImg, null);
// get Base64 encoded image
xr.next();
String base64 = xr.getText();
System.out.println("------------ base64 ---------------");
System.out.println(base64);
System.out.println("-----------------------------------");
// store in our Vector of byte[]
if (imagesBase64 == null) imagesBase64 = new Vector();
imagesBase64.addElement(base64);
// store in our Vector of Images
if (images == null) images = new Vector();
byte[] byteArray = org.kobjects.base64.Base64.decode(base64);
line 129>images.addElement(Image.createImage(byteArray, 0, byteArray.length));
// lookup end of tag
XmlUtils.requireTag(xr, null, XmlUtils.tagImg);
} while (true);
}
------------ base64 ---------------
iVBORw0KGgoAAAANSUhEUgAAACQAAAAkCAYAAADhAJiYAAABFklEQVR4nO1Y
QQ6EIAwcNn5ieaDv4B08sPsM9tTE1IKVopLNTmKwKHbswGAMKaWCibAAwLqu
4WkiAJBzLq+nSUgstQsxxkJEgc/ldSIK236OeYx8hpuQTF5LIGO+R3sJCy6R
rJcMMIBQjLFI6bbtWZgka0FL3EsGuEgyD4ZL5kVVMosUZ2MLppNsVyFtxUhJ
NJ9p9Wmtli+lpFdII0JEgQ9LX6sKWi5uq5J5lq4HLh/S5PXCTMjqxl4LMBOy
VqD1hdBNaKTRnYXZGD3zRb4gx9pzdoSsm+VRX22eHY2bzql/k9D7jt3+biIM
d4U+g7cYF6HRZIBfndQj8Sd0hOkIdfuQ9KBt7Fl93YSuWPLArJLlnKf5rfcF
lRbRSTvuHacAAAAASUVORK5CYII=
-----------------------------------
Exception in thread "main" java.lang.UnsatisfiedLinkError: decodeImage
at javax.microedition.lcdui.ImmutableImage.decodeImage(Native Method)
at javax.microedition.lcdui.ImmutableImage.<init>(Image.java:417)
at javax.microedition.lcdui.Image.createImage(Image.java:262)
at com.mobimega.spirit.core.model.vo.ElementClass.parseImages(ElementClass.java:129)
at com.mobimega.spirit.core.model.vo.ItemClass.parse(ItemClass.java:94)
at com.mobimega.spirit.core.model.vo.Context.parseItemClasses(Context.java:326)
at com.mobimega.spirit.core.model.vo.Context.parseGameStaticContext(Context.java:259)
at com.mobimega.spirit.core.model.vo.Context.parse(Context.java:87)
at com.mobimega.spirit.core.model.vo.Board.parse(Board.java:132)
at com.mobimega.spirit.tools.CheckXML.httpParse(CheckXML.java:115)
at com.mobimega.spirit.tools.CheckXML.parse(CheckXML.java:128)
at com.mobimega.spirit.tools.CheckXML.main(CheckXML.java:70)

java.sh
-------
#!/bin/bash
# User specific aliases and functions
JavaIDE=/opt/JavaIDE
JAVA_HOME=${JavaIDE}/j2sdk1.4.2_04
ANT_HOME=${JavaIDE}/apache-ant-1.6.1
CLASSPATH=${JavaIDE}/commons-net-1.1.0/commons-net-1.1.0.jar
LD_LIBRARY_PATH=/opt/JavaIDE/j2me/wtk2.1/bin
export JavaIDE
export JAVA_HOME
export ANT_HOME
export CLASSPATH
export LD_LIBRARY_PATH
PATH=${PATH}:${JAVA_HOME}/bin
export PATH

[Fernando Gomes]

It seems I discovered something weird in my Linux box.
The problem was hostname and domainname were misconfigured.
Probably you will receive a strange message when WTK emulator is started, telling you something like "hostname not found" or "wrong IP"... I don't remember very well.
My /etc/sysconfig/networking/profiles/default/network was ...
HOSTNAME=sirius.localdomain
... and should be:
HOSTNAME=sirius
DOMAIN=localdomain
Enter RedHat network configuration applet and reconfigure your system, restart networking and check if everything seem OK. Start WTK emulator and you should not see the weird message anymore.
I hope it helps.
Fernando Gomes

[sun gong]

It seems that the code attempts
to run (with calling native) without the sand box;

if run from :
public static void main(String[] args){
//the j2me code
}
it will throw the java.lang.UnsatisfiedLinkError:*****

but run from:
public class YourMIDlet extends MIDlet{
protected void startApp() throws MIDletStateChangeException {
//from here:
String msg = "你好!!";
SMSSendThreadHTTPImpl httpImpl = new SMSSendThreadHTTPImpl(msg);
Thread httpSend = new Thread(httpImpl);
httpSend.start();
}

}
it will OK!!!

[ January 10, 2006: Message edited by: sun gong ]
[ January 10, 2006: Message edited by: sun gong ]