ArticleFragment.java

 //Data methods
    private void getValuesUrl(){
        Log.e("fragment", URL_CONNECTION);
        JsonObjectRequest request = new JsonObjectRequest(this.URL_CONNECTION, null,
                new Response.Listener<JSONObject>() {
                    @Override
                    public void onResponse(JSONObject response) {
                        //System.out.print("response: "+response);
                        setValuesUrl(response);
                    }
                },new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.e(TAG, "Error Volley");
            }
        });
        TopChef.getInstance().addToRequestQueue(request);
    }

    private void setValuesUrl(JSONObject response){
        try {
            this.mData.clear();

            JSONArray jsonArrayArticles = response.getJSONArray(ArticlesModel.CN_ARTICLES);

            for (int articles = 0; articles < jsonArrayArticles.length(); articles++) {
                JSONObject jsonObjectArticle = ((JSONObject)jsonArrayArticles.get(articles)).getJSONObject(ArticlesModel.CN_ARTICLE);
                ArticlesModel articlesModel = new ArticlesModel();
                articlesModel.setContent(jsonObjectArticle.getString(articlesModel.CN_CONTENT));
                articlesModel.setTitle(jsonObjectArticle.getString(articlesModel.CN_TITLE));
                articlesModel.setExcerpt(jsonObjectArticle.getString(articlesModel.CN_EXCERPT));
                articlesModel.setShare_url(jsonObjectArticle.getString(articlesModel.CN_SHARE_URL));
                articlesModel.setPublished_at(jsonObjectArticle.getString(articlesModel.CN_PUBLISHED));
                articlesModel.setSlug(jsonObjectArticle.getString(articlesModel.CN_SLUG));

                /** Photos **/
                JSONArray jsonArrayPhotos = jsonObjectArticle.getJSONArray(articlesModel.CN_PHOTOS);
                for (int photos = 0; photos < jsonArrayPhotos.length(); photos++) {
                    JSONObject jsonObjectPhotos = (JSONObject) jsonArrayPhotos.get(photos);

                    ArticlesPhotosModel articlesPhotosModel = new ArticlesPhotosModel();

                    articlesPhotosModel.setDetail(jsonObjectPhotos.getString(articlesPhotosModel.CN_DETAIL));
                    articlesPhotosModel.setNormal(jsonObjectPhotos.getString(articlesPhotosModel.CN_NORMAL));
                    articlesPhotosModel.setPinterest(jsonObjectPhotos.getString(articlesPhotosModel.CN_PINTEREST));
                    articlesPhotosModel.setPinterest_retina(jsonObjectPhotos.getString(articlesPhotosModel.CN_PINTEREST_RETINA));
                    articlesPhotosModel.setRetina2x(jsonObjectPhotos.getString(articlesPhotosModel.CN_RETINA2X));
                    articlesPhotosModel.setRetina3x(jsonObjectPhotos.getString(articlesPhotosModel.CN_RETINA3X));

                    articlesModel.setArticle_photos(articlesPhotosModel);
                }


                /** Videos **/
                JSONArray jsonArrayVideos = jsonObjectArticle.getJSONArray(articlesModel.CN_ARTICLE_VIDEOS);
                for (int videos = 0; videos < jsonArrayVideos.length(); videos++) {
                    JSONObject jsonObjectVideo = jsonArrayVideos.getJSONObject(videos);

                    ArticlesVideosModel articlesVideosModel = new ArticlesVideosModel();
                    articlesVideosModel.setHls_url(jsonObjectVideo.getString(articlesVideosModel.CN_HLS_URL));
                    articlesVideosModel.setUrl(jsonObjectVideo.getString(articlesVideosModel.CN_URL));
                    articlesVideosModel.setRetina3x(jsonObjectVideo.getString(articlesVideosModel.CN_RETINA3X));
                    articlesVideosModel.setRetina2x(jsonObjectVideo.getString(articlesVideosModel.CN_RETINA3X));
                    articlesVideosModel.setNormal(jsonObjectVideo.getString(articlesVideosModel.CN_NORMAL));
                    articlesVideosModel.setCover(jsonObjectVideo.getString(articlesVideosModel.CN_COVER));
                    articlesVideosModel.setCover_retina(jsonObjectVideo.getString(articlesVideosModel.CN_COVER_RETINA));

                    articlesVideosModel.setCover_width(jsonObjectVideo.getInt(articlesVideosModel.CN_COVER_WIDTH));
                    articlesVideosModel.setCover_height(jsonObjectVideo.getInt(articlesVideosModel.CN_COVER_HEIGHT));

                    articlesModel.setArticle_videos(articlesVideosModel);
                }


                this.mData.add(articlesModel);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        this.mAdapter.notifyDataSetChanged();
        this.PBLoadData.setVisibility(View.INVISIBLE);
        this.mGridView.setVisibility(View.VISIBLE);
    }