[android help] From BufferredImage to Byte[] without IO ---- failed

I am attempting to take continuous screenshots and stream them over a socket to my android phone. I used ImageIO for this like this:

while(true){            
            baos = new ByteArrayOutputStream();
            ImageIO.write(screenshot, "png", baos);
            byte[] imageArray = baos.toByteArray();
            oos.writeInt(imageArray.length);
            oos.write(imageArray);
            oos.flush();
            imageArray = null;
        }

This worked fine, however, there was huge lag time in the pictures showing up on the phone, and I figured it was because of the ImageIO. so I looked around in stackoverflow for a solution to this, and found this method and tried it:

    while(true){
            //take screenshot of the screen periodically and send to the server
            screenshot = robot.createScreenCapture(rectangle);
            byte[] imageArray = ((DataBufferByte)screenshot.getRaster().getDataBuffer()).getData();
            oos.writeInt(imageArray.length);
            oos.write(imageArray);
            oos.flush();
            imageArray = null;
}

But this keeps giving me this exception:

Exception in thread "main" java.lang.ClassCastException: java.awt.image.DataBufferInt
    cannot be cast to java.awt.image.DataBufferByte

Can someone please help?

.

stackoverflow.comm