Image not showing up on target device, Nokia 7610

[shufeilei]

I am programming an application in J2ME for Nokia 7610. I am trying to append an ImageItem to a form.

ImageItem image = new ImageItem ("Image", Image.createImage("/image.png"), ImageItem.LAYOUT_CENTER, null);
form.append (image);

The image shows up on the emulator fine. When I install it on the target device (Nokia 7610), the image does not show up.

I am pretty new to J2ME, so I hope someone would have answer to this question. Thank you!

Shufei

[shufeilei]

I figured out what was wrong. The image was too big fo rthe screen. When I replace the image with a smaller image, it shows up. It would be helpful if there was some sort of error that tells me that the image has exceed the display's boundary. However, I think it's the programmer's responsibility to make sure that the image will fit.

Shufei

[peterblazejewicz]

Hi Shufei,

I'm newbe too,
if you would use "altText" string when creating ImageItem isntead setting is to null in your constructor you will see that string on device screen - as to midp specification is exactly for that reason - when image is too big for screen,

also you can use the same image for various device screen sizes I believe and simply scale it down/up accordingly to current screen width/height:
http://forum.java.sun.com/thread.jsp...sageID=4053281
http://www.java-tips.org/java-me-tip...-zoom-out.html

if you create for MIDP 1.0 then image need to be converted to immutable type - in MIPD 2.0 you can use mutable or immutable for ImageItem,

regards,
Peter

[rak_eshz]

hi ,

u just put " try -catch " for that code for creating and appending the image item and find if any exception is throwing or not.


regards
rakesh

[peterblazejewicz]

hi,
@rakesh
AFAIK there is no exception for ImageItem constructor for that type of issue,
only for item layout argument and type of appearence,
possible issue is decribed in MIPD:

The altText parameter specifies a string to be displayed in place of the image if the image exceeds the capacity of the display. The altText parameter may be null.

if we pass null as altText it could happen that we will see nothing,

regards,
peter