[kvht]

Hi,

I have had a problem with signed midlet below:
-with unsign midlet, app can view image from HttpConnection
-when I sign this midlet, "bad image format" exception throw out
The image is JPG format.

byte[] tmp = httpconnectionmanager.getByteArray();
mImage = Image.createImage(tmp,0,tmp.length);

I tested on N73, E63, E71, 5800 XpressMusic.

Can anyone help me to resolve this issue?

Thank inadvance,

[grahamhughes]

When you sign, are you requesting permission for HttpConnection?

Are you sure you're receiving the same byte array in both cases?

Cheers,
Graham.

[kvht]

Yes, midlet has HttpConnection permission.

I used only build with sign and unsign to test. This error occur with creation image, I can get text data. I also check the size of byte array, there're no difference between these builds.

thanks,
kvht

[grahamhughes]

What if you put the jpeg file in the JAR? Try loading it from the JAR using createImage(filename), and by using getResourceAsStream(), then creating from the byte[]. (Rationale: work isolate the problem as HttpConnection or createImage.)

Cheers,
Graham.

[kvht]

Hi Graham,

This is code that I tested. It OK!

import java.io.ByteArrayOutputStream;
import java.io.InputStream;

import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;


public class MainMidlet extends MIDlet {

	public MainMidlet() {
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {

	}

	protected void pauseApp() {

	}

	protected void startApp() throws MIDletStateChangeException {
		Form frm = new Form("Test");
		try {
			Image img = Image.createImage("/i.jpg");
			frm.append(img);
		} catch (Exception e) {
			frm.append((new StringBuffer("Err: ")).append(e.getMessage()).toString());
		}
		
		try {
			Image img = Image.createImage((new String("")).getClass().getResourceAsStream("/i.jpg"));
			frm.append(img);
		} catch (Exception e) {
			frm.append((new StringBuffer("Err: ")).append(e.getMessage()).toString());
		}
		
		try {
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			InputStream is = (new String("")).getClass().getResourceAsStream("/i.jpg");
			int _int;
			while ((_int = is.read())!=-1){
				bos.write(_int);
			}
			byte[] tmp = bos.toByteArray();
			Image img = Image.createImage(tmp,0,tmp.length);
			frm.append(img);
		} catch (Exception e) {
			frm.append((new StringBuffer("Err: ")).append(e.getMessage()).toString());
		}
		Display.getDisplay(this).setCurrent(frm);
	}

}

[grahamhughes]

You get all three images? Even if you sign the MIDlet?

OK... I still have no idea why it doesn't work!! :-)

My next suggestion is: put the jpeg in the JAR, and download it from the server. Load the jpeg from the JAR into a byte[], so you can compare the JAR byte[] with the HTTP-downloaded byte[]. If you have two identical byte[]'s, then either both must work, or both must fail. If they are different... then something strange is happening in the HttpConnection.

Graham.

[kvht]

Thank you, Graham.

I found out why it did not work. With signed build, HttpConnection does set (or set wrong +_+) User-Agent so server return an error. It will be resolved by fixing on server or set an User-Agent (any :D) on client.

-kvht