CHUYEN HINH THANH BYTE

public byte[] ImageView_To_Byte(ImageView imgvHinhSP){

        //Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.chomuc);

        BitmapDrawable drawable = (BitmapDrawable) imgvHinhSP.getDrawable();

        Bitmap bmp = drawable.getBitmap();

        ByteArrayOutputStream stream = new ByteArrayOutputStream();

        bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);

        byte[] byteArray = stream.toByteArray();

        return byteArray;

}