Android : Getting data (Image) from Json

I'm making a blog reader for Android and problem is I'm a new in programming. Trying to get data from Json. I did it for String data("title","author"), but I don't know how to do it for images ("thumbnail"). My question is: how to add "thumbnail" at the left part of the listView in front of "title" and "author".

  {
      "id": 109,
      "url": "http://integrallab.ru/index.php/categorii-so-statyami/2013-10-25-13-26-29/3-ideas",
      "title": "Article title",
      "date": "2015-03-17 09:21:43",
      "author": "Nikolai Boiko",
      "thumbnail": "http://integrallab.esy.es/pic/3_things.jpg"
    },

the code is:

......

  private final String KEY_TITLE = "title";
    private final String KEY_AUTHOR = "author";

.....

private void handleBlogResponse() {
        mProgressBar.setVisibility(View.INVISIBLE);
        if (mBlogData == null) {
            updateDisplayForError();

    } else {
        try {
            JSONArray jsonPosts = mBlogData.getJSONArray("posts");
            ArrayList<HashMap<String, String>> blogPosts =
                    new ArrayList<HashMap<String, String>>();
            for (int i=0; i<jsonPosts.length(); i++){
                JSONObject post = jsonPosts.getJSONObject(i);
                String title = post.getString(KEY_TITLE);
                title = Html.fromHtml(title).toString();
                String author = post.getString(KEY_AUTHOR);
                author = Html.fromHtml(author).toString();

                HashMap<String, String> blogPost = new HashMap<String, String>();
                blogPost.put(KEY_TITLE, title);
                blogPost.put(KEY_AUTHOR, author);

                blogPosts.add(blogPost);
            }

          String[] keys = { KEY_TITLE, KEY_AUTHOR };
            int[] ids = { android.R.id.text1, android.R.id.text2 };
            SimpleAdapter adapter = new SimpleAdapter(this, blogPosts,
                    android.R.layout.simple_list_item_2, keys,ids);
            setListAdapter(adapter);
        } catch (JSONException e) {
            logException(e);
        }
    }

Thanks for your attention!