Need help parsing this type of json in Android using retrofit for API response handling-CodePudding

Please show me a way to make a proper model for this JSON so that I get "Indian Premier League" as the key and the array next to it as value. We can have multiple leagues as well in the json.

{
    "keySeriesNews": {
        "Indian Premier League": [
            {
                "id": 203,
                "slug": "tata-ipl-2022-why-delhi-capitals-bought-shardul-thakur-for-inr-1075-crore",
                "competition_id": 3269,
                "image_id": 1203,
                "image_caption": "Shardul Thakur in action",
                "start_date": "2022-03-05 17:25:38",
                "created_at": "2022-03-05 12:08:19",
                "updated_at": "2022-04-15 06:50:30",
                "headline": "TATA IPL 2022: Why Delhi Capitals bought Shardul Thakur for INR 10.75 crore",
                "sport_id": 15,
                "image": {
                    "id": 1203,
                    "file_name": "shardulthakur_new.webp",
                    "created_at": "2022-04-15 06:47:41",
                    "image_path": "https://stagingkisma.6lgx.com/storage/images/shardulthakur_new_320x320.webp"
                },
                "competition": {
                    "id": 3269,
                    "slug": "indian-premier-league-2",
                    "competition_name": "Indian Premier League"
                }
            }
        ]
    }
}

I have used this model to parse in retrofit but it is not fetching any data from the API. It is completely blank. No data in it.

data class HomeNewsParentModel(

    @SerializedName("keySeriesNews" ) var keySeriesNews: JSONObject? = JSONObject()

)

However, when I use this model, it fetches data and I can access it. But problem is that it is hardcoded. I mean, these models will not capture data if the league name changes in any case. Here are the models which captured data.

data class HomeNewsParentModel(

     @SerializedName("keySeriesNews" ) var keySeriesNews: KeySeriesNews? = KeySeriesNews()

)

data class KeySeriesNews (

  @SerializedName("Indian Premier League" ) var league : ArrayList<League> = arrayListOf()

)

data class League (

  @SerializedName("id"             ) var id            : Int?         = null,
  @SerializedName("slug"           ) var slug          : String?      = null,
  @SerializedName("competition_id" ) var competitionId : Int?         = null,
  @SerializedName("image_id"       ) var imageId       : Int?         = null,
  @SerializedName("image_caption"  ) var imageCaption  : String?      = null,
  @SerializedName("start_date"     ) var startDate     : String?      = null,
  @SerializedName("created_at"     ) var createdAt     : String?      = null,
  @SerializedName("updated_at"     ) var updatedAt     : String?      = null,
  @SerializedName("headline"       ) var headline      : String?      = null,
  @SerializedName("sport_id"       ) var sportId       : Int?         = null,
  @SerializedName("image"          ) var image         : Image?       = Image(),
  @SerializedName("competition"    ) var competition   : Competition? = Competition()

)

I have coded for a parser on the generic side to handle key-value type JSON like this but the JSON object was empty when I used the first approach of the data model. I need to make a generic parser to fetch league names as well as their data in key-value format since there can be multiple leagues that can come in this response as well.

PS: This is my parser which is getting empty JSON Object

private fun parseJSONData(data: JSONObject){

        try {
            val jsonObject = JSONObject(data)
            for (key in jsonObject.keys()) {
                Toast.makeText(
                    [email protected](),
                    "Key : "   key   " Value: "   jsonObject.optString(key),
                    Toast.LENGTH_SHORT
                ).show()
            }
        } catch (e: JSONException) {
            e.printStackTrace()
        }
    }

Your help is much appreciated. Thanks.

CodePudding user response：

Just a tip - if you already have the JSON available, you can use this plugin to easily generate a first draft of your model and adapt it if needed.

Some questions:

If you can have multiple leagues in your response, shouldn't keySeriesNews also be a list and not just a JSON object? For example like this:

{   
   "keySeriesNews": [       
      {             
        "id": 203,          
        "title": "Indian Premier League",
        "slug": "tata-ipl-2022-why-delhi-capitals-bought-shardul-thakur-for-inr-1075-crore",
        "competition_id": 3269,
        "image_id": 1203,           
        ...         
       }    
    ] 
}

What's your reasoning for handling JSON manually instead of using a ConverterFactory?
Where and how are you calling parseJsonData?

CodePudding user response：

Well, I am not sure about this is correct or not. If anyone has a standard way of doing it, it is much appreciated. However, I have used the JSONElement instead of JSONObject or JSONArray and have used Map to handle key-value type data in my model, and GSONConvertorFactory has got this one right and fetched data correctly. This is the model I used:

data class HomeNewsParentModel(

   @SerializedName("keySeriesNews" ) var keySeriesNews: HashMap<String, JsonElement>? = HashMap()

)

And I will parse JSONElement in my parseJsonData function to handle the key-value of this nonstandard JSON coming from API.

Hope this helped you in some way.