Scaled AImage from byte[] ?

asked 2014-01-16 07:19:09 +0800

CR13
36 ● 1

updated 2014-01-16 07:21:26 +0800

Hello!

I always got the following error, when dislaying image-data: "Unsupported image format: jpeg; its width and height are assumed to zero"

I have a upload-dialog which does the follwing:

private void prepareUpload(){
Media[] images = event.getMedias();
for (Media med : images) {
   if (med instanceof Image) {
   ....
   picture.setData(med.getByteData()) // in picture-class, data is a byte[]
   selectedFiles.add(picture); // local list for storing all selected pictures
   handleUpload();
}
}
private void handleUpload(){

// for every picture-object in the list...
ByteArrayInputStream in = new ByteArrayInputStream(picture.getData());
        try {
            BufferedImage img = ImageIO.read(in);

            // Scaling thumbail
            int[] newDimensions = getNewDimensions(img.getWidth(), img.getHeight()); // calculating Dimensions of Thumbnail
            java.awt.Image tempImg = (java.awt.Image) img. getScaledInstance(newDimensions[0], newDimensions[1],
                    java.awt.Image.SCALE_SMOOTH);
            BufferedImage imageBuff = new BufferedImage(newDimensions[0], newDimensions[1], BufferedImage.TYPE_INT_RGB);

            imageBuff.getGraphics().drawImage(tempImg, 0, 0, new Color(0, 0, 0), null);
            ByteArrayOutputStream buffer = new ByteArrayOutputStream();
            ImageIO.write(imageBuff, "jpg", buffer);

            AImage aimg = new AImage(picture.getFileName(), buffer.toByteArray());

            picture.setThumbnail(aimg.getByteData());

}

Now using a "saveService" for storing the pictures to database.

When i put the picture in another list, which is binded to a listbox and do a "notifyChange", the thumbnails will be displayed, but when i reload the data from database, the error above is raising. Has anyone an idea, what i'm doing wrong?

Thanks in advance!!