How to parse json with dynamic keys using Retrofit 2.0?

Question

Here's the JSON where jsonObject key is dynamic :

{
  "CH000032": [
    {
      "type": "event",
      "details": {
        "programID": "MV10000032",
        "programType": "MOVIE",
        "title": "Titanic",
        "year": "1997",
        "rating": "PG-13",
        "durationSec": 11640,
        "startTimeSec": "",
        "endTimeSec": "",
        "language": "ENG",
        "isHD": true,
        "Genres": [
          "Movies",
          "Action"
        ],
        "description": "A seventeen-year-old aristocrat falls in love with a kind but poor artist aboard the luxurious, ill-fated R.M.S. Titanic.",
        "imageUrl": "http://res.cloudinary.com/dte07foms/image/upload/c_scale,h_405,w_270/l_Copyright_e3jt1k/v1508831090/Titanic_b0hqo0.jpg"
      }
    }
  ],
  "CH000033": [
    {
      "type": "event",
      "details": {
        "programID": "EP10000132",
        "programType": "EPISODE",
        "title": "A Chic Bar in Ibiza",
        "seriesTitle": "Two and a Half Men",
        "seasonNumber": 12,
        "epsiodeNumber": 2,
        "year": "2014",
        "rating": "TV-14",
        "durationSec": 1260,
        "startTimeSec": "",
        "endTimeSec": "",
        "language": "ENG",
        "isHD": true,
        "Genres": [
          "Comedy",
          "Romance"
        ],
        "description": "Alan has second thoughts about getting married when Walden has him sign a prenup.",
        "imageUrl": "http://res.cloudinary.com/dte07foms/image/upload/c_crop,h_405,w_270//l_Copyright_e3jt1k/v1508831090/2AndHalfmen_splkro.jpg"
      }
    }
  ]
}

I would like to parse this JSON. Please let me know how should the class
be written with @SerializedName annotation using Retrofit.

Note : CH000032, CH000033 etc are dynamic.

Use [this](http://www.jsonschema2pojo.org/) to generate pojo from json response. — Harshad Prajapati, Dec 11 '17 at 07:15
@HarshadPrajapati I already tried. It takes CH000032 as a class name which is not the case. Because It's dynamic. — Rakesh, Dec 11 '17 at 07:17
Possible duplicate of [How to parse dynamic JSON with Retrofit?](https://stackoverflow.com/questions/41856975/how-to-parse-dynamic-json-with-retrofit) — Aks4125, Dec 11 '17 at 07:18
@HarshadPrajapati My keys are dynamic bro :( So I don't know the class name in advance — Rakesh, Dec 11 '17 at 07:20
@Rakesh check my answer use hashmap in model class that help for dynamic key :) — Subhash Prajapati, Dec 11 '17 at 07:21
You can refer : https://stackoverflow.com/questions/47707564/how-to-automatically-generate-model-class-from-json-in-android — Thientvse, Dec 11 '17 at 07:25
@Thientvse, POJO generator generates the class with names CH000033 etc, which isn't what I want. Because those are dynamic keys — Rakesh, Dec 11 '17 at 08:17

score 7 · Accepted Answer · edited Dec 13 '17 at 05:24

7

You can use Map<String, ModelClassName> in your model class for dynamic like below :-

public class Data {
    @SerializedName("your_key")
    @Expose
    private Map<String, ModelClassName> result;

    //....
}

this can help to parse dynamic key in retrofit.

edited Dec 13 '17 at 05:24

Maddy

4,525
4
33
53

answered Dec 11 '17 at 07:20

Subhash Prajapati

196
2
10

1

What's YOURKEYNAME? – Rakesh Dec 11 '17 at 08:04
your main responce object keyname is used there – Subhash Prajapati Dec 11 '17 at 08:05
And what's that w.r.t the above json? – Rakesh Dec 11 '17 at 08:07
show me your full json resoponce i will tell you how your model class will be :) – Subhash Prajapati Dec 11 '17 at 08:08
The above provided one is the full response bro :) Please help – Rakesh Dec 11 '17 at 08:08
your parent object has no key ?? – Subhash Prajapati Dec 11 '17 at 08:11
tell me your parent object key name – Subhash Prajapati Dec 11 '17 at 08:12
can you get this responce in string ? – Subhash Prajapati Dec 11 '17 at 08:19
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/160908/discussion-between-subhash-prajapati-and-rakesh). – Subhash Prajapati Dec 11 '17 at 08:19

score -1 · Answer 2 · edited Dec 11 '17 at 10:13

What you are asking will take much work , instead a better approach will be to change the structure o json to something like this -

"data": [
    {
        "type": "event",

         "programID": "MV10000032",
         "programType": "MOVIE",
         "title": "Titanic",
         "year": "1997",
         "rating": "PG-13",
         "durationSec": 11640,
         "startTimeSec": "",
         "endTimeSec": "",
         "language": "ENG",
         "isHD": true,
         "Genres": [
           "Movies",
           "Action"
         ],
        "description": "A seventeen-year-old aristocrat falls in love with a kind but poor artist aboard the luxurious, ill-fated R.M.S. Titanic.",
        "imageUrl": "http://res.cloudinary.com/dte07foms/image/upload/c_scale,h_405,w_270/l_Copyright_e3jt1k/v1508831090/Titanic_b0hqo0.jpg"

    },

    {
        "type": "event",

         "programID": "MV10000032",
         "programType": "MOVIE",
         "title": "Titanic",
         "year": "1997",
         "rating": "PG-13",
         "durationSec": 11640,
         "startTimeSec": "",
         "endTimeSec": "",
         "language": "ENG",
         "isHD": true,
         "Genres": [
         "Movies",
           "Action"
        ],
        "description": "A seventeen-year-old aristocrat falls in love with a kind but poor artist aboard the luxurious, ill-fated R.M.S. Titanic.",
        "imageUrl": "http://res.cloudinary.com/dte07foms/image/upload/c_scale,h_405,w_270/l_Copyright_e3jt1k/v1508831090/Titanic_b0hqo0.jpg"

    }]

yes, you can use the interceptor of retrofit to manually parse the json and create the model at runtime — Apoorv Singh, Dec 11 '17 at 10:13

How to parse json with dynamic keys using Retrofit 2.0?

2 Answers2