Android : Set image from WebService as icon in AlertDialog

i am currently making an app, in which , when user long presses an item of list it pops up an alert dialog with some info related to listItem.

I want to set Icon from path provided by my API. TeamFlagIC is in TeamsMapper class, which contains the path of image.

This is my onPostExecute Method.

@Override
    protected void onPostExecute(Object result) {
        if (progressDialog.isShowing()) {
            progressDialog.dismiss();
        }

        String json = result.toString();
        Gson gson = new Gson();
        Type type = new TypeToken<List<TeamsMapper>>() {}.getType();
        final ArrayList<TeamsMapper> pd = (ArrayList<TeamsMapper>) gson.fromJson(json, type);
        dataAdapter = new TeamsCustomAdapter(Teams.this, pd);
        listView.setAdapter(dataAdapter);

        imageLoader = new ImageLoader(Teams.this);

        final AlertDialog.Builder ImageAlertBuilder = new AlertDialog.Builder(Teams.this);
        inflater = (LayoutInflater) (Teams.this).getSystemService(LAYOUT_INFLATER_SERVICE);


        listView.setOnItemLongClickListener(new OnItemLongClickListener() {


            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View v,int position, long id) {

                View layout = inflater.inflate(R.layout.popup_from_list,(ViewGroup) findViewById(R.id.linear_layout_popup));
                imgViewDialogImage = (ImageView) layout.findViewById(R.id.imgView_fullimage);
                txtViewTeamsdata = (TextView) layout.findViewById(R.id.txtView_fullimage);

                imageLoader.DisplayImage(pd.get(position).TeamFlagFS,imgViewDialogImage);

                String iurl = pd.get(position).TeamFlagIC;
                bitMap = getBitmapFromURL(iurl);
                drawable = new BitmapDrawable(getResources(),bitMap);
                ImageAlertBuilder.setIcon(drawable); //<--- 
                ImageAlertBuilder.setTitle("     "+ pd.get(position).TeamName);
                ImageAlertBuilder.setView(layout);
                ImageAlertBuilder.setPositiveButton(android.R.string.ok,new OnClickListener() {

                            @Override
                            public void onClick(DialogInterface dialog,
                                    int arg1) {
                                dialog.dismiss();
                            }
                        });

                txtViewTeamsdata.setText("\n "  + pd.get(position).TeamName 
                        + " \n  "+ pd.get(position).TeamCode 
                        + "\n" + pd.get(position).LeagueName);
                ImageAlertBuilder.create();
                ImageAlertBuilder.show();
                return false;
            }
        });

Image downloader from Url

public static Bitmap getBitmapFromURL(String src) {
    try {
        URL url = new URL(src);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setDoInput(true);
        connection.connect();
        InputStream input = connection.getInputStream();
        Bitmap myBitmap = BitmapFactory.decodeStream(input);
        return myBitmap;
    } catch (IOException e) {
        // Log exception
        return null;
    }
}