Get JSON String by iterating over array inside an object

Question

Im working on an app where Im parsing JSON file and get the strings from it, but there is one String I have no idea why cant I get it into my activity. the String is Object > Array > String I have 2 activities and 1 model. MainActivity: where Im parsing the JSON. DetailActivity: where I need the String. PostModel: a model where I have all setter and getter.

JSON:

{  
   "status":"ok",
   "count":10,
   "count_total":184,
   "pages":19,
   "posts":[  
      {  },
      {  
         "id":2413,
         ,
         "categories":[  
            {  
               "id":100,
               "slug":"logging",
               "title":"logging",
               "description":"",
               "parent":0,
               "post_count":1
            }
         ],
        "comments":[  
            {  
               "id":3564,
               "content":"<p>\u47 <\/p>\n",
               "parent":0
            }
         ],
         "comment_count":1,
         "thumbnail":"http:\/\/www.5.com\/wtent\g",
         "custom_fields":{  
            "dsq_thread_id":[  
               "2365140"
            ],
            "videoID":[  
               "--ffwf92jvDFy"
            ]
         },
         "thumbnail_images":{  
            "full":{  
               "url":"http:\/\/www.5.com\/jpg",
               "width":727,
               "height":454
            },
            "thumbnail":{  
               "url":"http:\/\/www.5.com\/wp-con50.jpg",
               "width":150,
               "height":150
            }
         }
      }
   ]
}

PostModel:

    private List<VidCast> videoIDList;
    private String videoID;
    public String getVideoID() {
        return videoID;
    }

    public void setVideoID(String videoID) {
        this.videoID = videoID;
    }


    public List<VidCast> getvideoIDList() { return videoIDList; }

    public void setvideoIDList(List<VidCast> videoIDList) {
        this.videoIDList = videoIDList;
    }


    public static class VidCast {
        private String name;

        public String getName() {
            return name;
        }

        public void setName(String name) {
            this.name = name;
        }
    }

}

MainActivity:

                    List<PostModel.VidCast> vidCasts = JsonPath.parse(URL_TO_HIT).read("$.posts.[*].custom_fields.[*].videoID[*]");
                    vidCasts = new ArrayList<>();
                    for (int s = 0 ; s < finalObject.getJSONArray("custom_fields").length() ; s++){
                        PostModel.VidCast vidCast = new PostModel.VidCast();
                        vidCast.setName(videoID);
                        vidCasts.add(vidCast);
                    }
                    postModel.setvideoIDList(vidCasts);

                    // adding the final object in the list
                    postModelList.add(postModel);
                }
                return postModelList;

            }
        }

DetailActivity:

StringBuffer stringBuffer = new StringBuffer();
            for(PostModel.CategoryCast categoryCast : postModel.getCategoryCastList()){
                stringBuffer.append(categoryCast.getName() + ", ");
            }

            StringBuffer videoStringBuffer = new StringBuffer();
            for(PostModel.VidCast videoIDList : postModel.getvideoIDList()) {
                videoStringBuffer.append(videoStringBuffer.toString());
            }

At the last file is where I need to get the <> String. I spent a lot of time I just cant figure it out how I can iterate over array inside an object.

Thanks in advance!

__________update________

I managed to parse it that way :

            JSONObject customFields = finalObject.getJSONObject("custom_fields");
            JSONArray vidCastsJson = customFields.getJSONArray("videoID");
            List<PostModel.VidCast> videoIds = new ArrayList<>();
            for (int s = 0 ; s < vidCastsJson.length() ; s++){
                PostModel.VidCast vidCast = new PostModel.VidCast();                  
                vidCast.setName(vidCastsJson.optString(s));
                videoIds.add(vidCast);
                String videoID = String.valueOf(vidCastsJson);
                vidCast.setName(videoID);

and I use Stringbuffer at DetailActivityStringBuffer

videoStringBuffer = new StringBuffer();
            for(PostModel.VidCast vidCast : postModel.getvideoIDList()) {
                videoStringBuffer.append(vidCast.getName());
                String videoID = vidCast.toString();
            }

But now I'm getting the videoID with the array brackets like that ["F3lyzrt"] I want it as a string to be only F3lyzrt, so I can pass it to my youtube player. Any advice will be appropriated.

Thanks,

Answer 1

It would look something like this:

JSONObject root = // however you get your root JSON object
        JSONArray posts = root.optJSONArray("posts");
        for(int i=0; i < posts.length(); i++){
            JSONObject post = posts.optJSONObject(i);
            int id = post.optInt("id");
            JSONArray categories = post.optJSONArray("categories");
            // etc.
        }

Though you might want to consider using GSON or Jackson. With those libraries you can define a model to represent the data (jsonschema2pojo.org can help with that) and then it does all the parsing for you.

EDIT

You're not even trying to get the video id. Here's your code:

for (int s = 0; s < finalObject.getJSONArray("videoID").length(); s++){
                             {
                              postModel.setVideoID(videoID);
                                 postModelList.add(postModel);
                            }

You see how you're not retrieving the contents of the json array?

JSONArray videoIds = finalObject.getJSONArray("videoID");
for (int s = 0; s < videoIds.length(); s++){

                          String videoID = videoIds.optString(s);
                          postModel.setVideoID(videoID);
                             postModelList.add(postModel);
                        }