안드로이드 스튜디오에서 웹서버에서 보낸 이미지 받기

private void getImage() {

    String id = editTextId.getText().toString().trim();

    class GetImage1 extends AsyncTask<String, Void, Bitmap> {
        ProgressDialog loading;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            loading = ProgressDialog.show(Book.this, "Uploading...", null, true, true);
        }

        @Override
        protected void onPostExecute(Bitmap b) {
            super.onPostExecute(b);
            loading.dismiss();
            imageView3.setImageBitmap(b);
        }

        @Override
        protected Bitmap doInBackground(String... params) {
            String id = params[0];

            String add1 = "url 주소";

            URL url1 = null;

            Bitmap image1 = null;

            try {
                url1 = new URL(add1);
                image1 = BitmapFactory.decodeStream(url1.openConnection().getInputStream());
                //image1.setWidth();

                PublicValues.Book_bitmap3 = image1;
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            return image1;
        }
    }

    GetImage1 gi1 = new GetImage1();
    gi1.execute(id);
}

php : http://prettymen.tistory.com/38?category=753669