How to get ImageView image size (Android)

Question

i am working on an image gallery app in which i am loading images from internet and i am saving images to Sd Card on button click.

now what i want is i want to get the size of the image that is loaded in ImageView. i want to get image size in KB / Bytes.

i want to use image size to prevent duplicate save and replacing image.

this is my code that i am using to save image: same resolution images get replaced

    int intHeight = fullImageView.getHeight();
        int intWidth = fullImageView.getWidth();


        String dirname2 = "/Wallpapers/";

        File myDir2 = new File(Environment.getExternalStorageDirectory()
                .getPath() + dirname2);

        myDir2.mkdirs();

        String fname2 = "image" + intHeight + intWidth +".jpeg";
        File file2 = new File(myDir2, fname2);

        if (file2.exists())
            file2.delete();
        try {
            FileOutputStream out = new FileOutputStream(file2);
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out);
            out.flush();
            out.close();

        } catch (Exception e) {
            Toast.makeText(_context, "failed", Toast.LENGTH_SHORT).show();
        }

Please Note: i am asking about image size in KB or Bytes

Answer 1

Don't use image sizes as a validation for similarity. Instead compare the images. The simplest way is to iterate over every pixel and compare the RGB value. But this will give you only a valid answer if the images are really to 100% equal. If you like to detect similarity based on the image, independed of the resolution, you should search for a libary to compare images.

edit2: As mentioned, it would take a while to 'compare' the images by their structure. In this case, I would suggest to store the url, name and etag in a database and save the images via a UUID and make a db lookup (fast) if you want to save an image. But don't reinvent the wheel. Just use a libary that is able to handle this kind of image storing. I recommend Picasso

edit: I can give you a sample code for pixel iteration. Feel free to enhance it:

public static void iterateOverImage(BufferedImage image){  
    int currentColor;
    for(int x = 0; x < widthInPx; x++){
        for(int y = 0; y < heightInPx; y++){
            currentColor = image.getRGB(x, y);
            //do something with it (i.e comparison)
        }
    }
}

edit3:

    public int sizeInByte() {
    try {
        ByteArrayOutputStream b = new ByteArrayOutputStream();
        ObjectOutputStream o = new ObjectOutputStream(b);
        o.writeObject(yourObject);
        o.flush();
        o.close();
        return b.length;
    } catch (IOException e) {
        ExceptionHandler.logAndSendException(e);
    }
    return -1;
}

And cgew85 answer!

Sorry for my english and greets, Steve.