Images are sent in the form of bytes array. you can access them by using a RestFUll api from sql server to your android application.
image will be retrieved in json and then converted to image from bytes array.
JSONArray jsonArray = new JSONArray(jsonString);
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject jsonObject = (JSONObject) jsonArray.get(i);
byte[] byteArray = Base64.decode(jsonObject.getString("image"), Base64.DEFAULT) ;
Bitmap bmp1 = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
}
bmp1 is the image, you can use it according to your needs