CODEWITHSUNDEEP
androidarraysjsonkotlin
daniel_c
daniel_c

Reputation: 93

How do i access the strings in a json array in a bigger jsonArray json in kotlin Android

I have a json file in android studio, it's a json array of objects, in each object there's a json array called options that has just strings each, not an object.

How can i access the value of the strings in options json array so i can set it as text of a text view.

I've tried doing optionsJsonArry.getString(index), this returns the whole array. I need to get the individual strings in the array.

This what my json file looks like

 {
  "questions":[
    {
      "id":"1",
      "question_text":"1. What is your gender?",
      "description_text":"1. What is your gender?",
      "options":[
        {
          "option_1":"Male",
          "option_2":"Female",
          "option_3":"Not necessary"
        }
      ]
    },
    {
      "id":"2",
      "question_text":"2. In what year were you born?",
      "description_text":"2. In what year were you born?",
      "options":[
        {
          "option_1":"Yes",
          "option_2":"No",
          "option_3":"Not Sure"
        }
      ]
    },

i am trying to get the strings in options jsonarray here

This what i have tried

 fun getPraQuestions(file: InputStream) {
    val questionData = arrayListOf<PraModel>()
    val optionList = arrayListOf<String>()
    try {

        val obj = JSONObject(loadJSONFromAsset(file))
        val jsonArray = obj.getJSONArray("questions")

        Log.d("json array Length", jsonArray.length().toString())
        for (i in 0 until jsonArray.length()) {
            val singleJson = jsonArray.getJSONObject(i)
            val id = singleJson.getString("id")
            val questionText = singleJson.getString("question_text")
            val options = singleJson.getJSONArray("options")

            val optionObj = JSONArray()
            val gottenArray = optionObj.getJSONArray("options")
//                val gson = Gson()
//                val convert: List<String> = gson.fromJson(options,Array<String>::class.java)
                val descriptionText = singleJson.getString("description_text")
                Log.d("optionList array Length", optionList.size.toString())
                questionData.add(PraModel(id, questionText, descriptionText, options = options))
            }
            _praQuestions.value = questionData
        } catch (e: JSONException) {
            e.printStackTrace()
        }
    }

Upvotes: 0

Views: 1379

Answers (2)

daniel_c
daniel_c

Reputation: 93

The issue is with the structure of the json, i just compared. it should look like this instead

  {
  "questions":[
    {
      "id":"1",
      "question_text":"1. What is your gender?",
      "description_text":"1. What is your gender?",
      "options":[
          "Male",
          "Female",
          "Not necessary"
      ]
    },
    {
      "id":"2",
      "question_text":"2. In what year were you born?",
      "description_text":"2. In what year were you born?",
      "options":[
         "Yes",
          "No",
          "Not Sure"
      ]
    },

The curly braces after the square brackets should not be there for the options array. Now ParentJsonArray[position].optionsArray.getString(index) works for retrieving the string

Upvotes: 1

Khaled hamdan
Khaled hamdan

Reputation: 31

the Best solution for this si To Use Gson which is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source code of. check this link for more details : https://github.com/google/gson

you can use this website to convert the JSON to Java Class there is others can be used for KOtlin also : https://www.jsonschema2pojo.org/

Upvotes: 0

Related Questions