Problem in loading gif/jpeg Image on Emulator.

[Muhammad Saifuddin]

Hi,

I having a difficulty in loading gif/jpeg format image in emulator. while the same code load the png format image without any complain.

public Image loadImage(String url) throws IOException {
        HttpConnection hpc = null;
        DataInputStream dis = null;
        try {
            hpc = (HttpConnection) Connector.open(url);
            hpc.setRequestMethod(HttpConnection.GET);
            hpc.setRequestProperty("User-Agent",
                    "Profile/MIDP-2.0 Configuration/CLDC-1.1");
            hpc.setRequestProperty("CONTENT-TYPE",
                    "application/x-www-form-urlencoded");
            hpc.setRequestProperty("Connection", "close");
            System.out.println("Response code: "+hpc.getResponseCode());
            System.out.println("Response message: " +hpc.getResponseMessage());
            int length = (int) hpc.getLength();
            System.out.println("response data length : "+ length);
            byte[] data = new byte[length];
            dis = new DataInputStream(hpc.openInputStream());
            dis.readFully(data);
            System.out.println("reading stream done !");
            System.out.println("data length !"+data.length);
            Image image = Image.createImage(data, 0, data.length);
            System.out.println("createImage done !");
            return image;
        } finally {
            if (hpc != null) {
                hpc.close();
            }
            if (dis != null) {
                dis.close();
            }
        }
    }

here is the output & exception when loading this url "http://www.coderanch.com/templates/default/images/on.gif".

Response code: 200
Response message: OK
response data length : 229
reading stream done !
data length !229
TRACE: <at java.lang.IllegalArgumentException>, Exception caught in Display class
java.lang.IllegalArgumentException
	at javax.microedition.lcdui.ImageDataFactory.decode(), bci=82
	at javax.microedition.lcdui.ImageDataFactory.createImmutableImageData(), bci=15
	at javax.microedition.lcdui.Image.createImage(), bci=40
	at hello.HttpMIDlet.loadImage(HttpMIDlet.java:103)
	at hello.HttpMIDlet.commandAction(HttpMIDlet.java:65)
	at javax.microedition.lcdui.Display$ChameleonTunnel.callScreenListener(), bci=46
	at com.sun.midp.chameleon.layers.SoftButtonLayer.processCommand(), bci=74
	at com.sun.midp.chameleon.layers.SoftButtonLayer.commandSelected(), bci=11
	at com.sun.midp.chameleon.layers.MenuLayer.pointerInput(), bci=170
	at com.sun.midp.chameleon.CWindow.pointerInput(), bci=76
	at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handlePointerEvent(), bci=19
	at com.sun.midp.lcdui.DisplayEventListener.process(), bci=296
	at com.sun.midp.events.EventQueue.run(), bci=179
	at java.lang.Thread.run(Thread.java:619)

Any help would be appreciated.
Thanks,

[Madhan Sundararajan Devaki]

I believe, you need to set the correct CONTENT-TYPE.

[Darryl Burke]

What image types does MIDP support?

[Muhammad Saifuddin]

Thanks for your reply Madhanand and Darryl,

@Madhan
changing the content type with image/gif is not make it work.

@Darryl
thanks for the url.

PNG was supported on the test platforms as it should be.

No other format was supported.

Does it mean that the code would work on real devices?

Thanks,