Saving Image

[snehalpatil]

Hello All,


I am developing an application in which i am showing images on canvas. by 3-4 images i am creating one image..now i want to save this image in any format which is recognize by any handset. i want to save whole as a single image.
is it possible. if yes then please tell me how can i save it in handset? or can we take snapshot of this screen.

[ektasrv]

Hello All,


I am developing an application in which i am showing images on canvas. by 3-4 images i am creating one image..now i want to save this image in any format which is recognize by any handset. i want to save whole as a single image.
is it possible. if yes then please tell me how can i save it in handset? or can we take snapshot of this screen.

Step 1: Create a big mutable image - fetch the graphics instance from it.
Step 2: Paint all other Images on this image using its graphics instance.
Step 3: refer to this FN wiki code - http://wiki.forum.nokia.com/index.ph...ing_in_Java_ME
Step 4: Write the PNG formated data using file Connection to the phone gallery.

[snehalpatil]

Step 1: Create a big mutable image - fetch the graphics instance from it.
Step 2: Paint all other Images on this image using its graphics instance.
Step 3: refer to this FN wiki code - http://wiki.forum.nokia.com/index.ph...ing_in_Java_ME
Step 4: Write the PNG formated data using file Connection to the phone gallery.

Hi,

Thanks for the reply,


How to fetch graphics instance?? actually i am not getting what u r saying

[ektasrv]

Hi,

Thanks for the reply,


How to fetch graphics instance?? actually i am not getting what u r saying

See the API doc - for Image class in j2me

try something like this -

    Image target= Image.createImage(tragetWidth, targetHeight);        // --- Step 1 create big image

    Graphics g = target.getGraphics();    // --- Step 1 - fetch the graphics instance
    
g.drawImage(img1, 0, 0, TOP|LEFT); // Step 2
g.drawImage(img2, 0, 0, TOP|LEFT);  
g.drawImage(img3, 0, 0, TOP|LEFT);

// Step 3 --- now you have a Image called target which has all these small images, do process it with png encoder

[snehalpatil]

hi
Thanks
I did that.
All images drawing,


this is the code :- but after in try....nothing is happening..System confirmation alert is coming on emulator asking "this application wants to write the local file system. Is it ok to update your files??" and its hanging the emulator..


byte[] pngData = PNGEncoder.toPNG(im, false);
FileConnection filecon;
try
{
System.out.println("In try ...");
filecon = (FileConnection)Connector.open("file:///C:/Nokia/Images/testPic.png");
if(!filecon.exists())
{
filecon.create();
}
System.out.println("after creating file...");
OutputStream os = filecon.openOutputStream();
System.out.println("after opening connection....");
os.write(pngData);
System.out.println("after writing data....");
os.close();
filecon.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

[raj_J2ME]

Try these points :

1. Try to put the OS.flush() before you close the streams.
2. Try to trace that whether there is any exception while you are wriitng the image,
3. Also dont use the PNG encoder first you test that whether your code is creating the image if yes the you encode.