[vdx]

hello friends,

I am developing an app tht sends image to server with help of http multipart request.
Nw, I want to convert the image in byte array.

    public static byte[] getByteArray(Image image)
    {
        int raw[] = new int[image.getWidth() * image.getHeight()];
        image.getRGB(raw, 0, image.getWidth(), 0, 0, image.getWidth(), image.getHeight());
        byte rawByte[] = new byte[image.getWidth() * image.getHeight() * 4];

        int n = 0;
        for(int i = 0; i < raw.length; i++)
        {
            int ARGB = raw[i];
            int a = (ARGB & 0xff000000) >> 24;
            int r = (ARGB & 0xff0000) >> 16;
            int g = (ARGB & 0xff00) >> 8;
            int b = ARGB & 0xff;
            rawByte[n] = (byte)b;
            rawByte[n + 1] = (byte)g;
            rawByte[n + 2] = (byte)r;
            rawByte[n + 3] = (byte)a;
            n += 4;
        }

        raw = null;
        return rawByte;
    }

when the 5th line "byte rawByte[] = new byte[image.getWidth() * image.getHeight() * 4];" got executed, its raising outofmemory exception....

wt should i do ??
Do I have any othe way to convert an image to byte array ??

[raj_J2ME]

Hi,
Can you make sure that how many times this methods executes?

[grahamhughes]

How big is the image (width and height)?

Why do you want to convert it into an array of pixels?

Cheers,
Graham.

[vdx]

thnx for the replay Raj, Grahamhughes

by doing some R&D and paperwork, finally i have removed the posted code with the below new one,

    public byte[] getImageBytes(String path)
    {
        byte[] imgData = new byte[0];

        try
        {
            FileConnection fc = (FileConnection) Connector.open(path, Connector.READ);
            InputStream stream = fc.openInputStream();
            long File_Size = fc.fileSize();
            final int CHUNK = 1;

            int length = 0;
            
            while(length < File_Size)
            {
                byte[] data = new byte[CHUNK];
                int readAmount = stream.read(data, 0, CHUNK);
                byte[] newImageData = new byte[imgData.length + CHUNK];
                System.arraycopy(imgData, 0, newImageData, 0, length);
                System.arraycopy(data, 0, newImageData, length, readAmount);
                imgData = newImageData;
                length += readAmount;
            }

        }catch(Exception e) {}
        return imgData;
    }

I want to send the image to an http server. For that I need to convert it into byte array.

nw i can read my image file data chunk by chunk.

by the way thnx lot 4 the replay. thnx 1s again... :)

[raj_J2ME]

Hi,
Since this is a very important thread/subject asked by the developers,so I would appreciate you if can share the solution.