JSONArray converts response null elements to "null"

Question

Trying to handle the response from API in Android Studio by using Kotlin. When converting the response of server from string to json the null values are converted as "null". If the value is null I want it as null. How to solve this problem?

Volley portion of the code:

val stringRequest = StringRequest(Request.Method.GET, url,
                Response.Listener<String> { response ->
                jsonList = JSONArray(response) }

Response of the server:

[
    {
        "id": 213,
        "dummy": null
    }
]

Call as Json

jsonList.getJSONObject(0).get("dummy")

Result of call:

As a result the below code will return "null" which is totally useless.

jsonList.getJSONObject(0).get("dummy")?.toSting()

Rahul Mishra · Accepted Answer · 2022-02-04 08:38:53Z

3

You can use like

jsonList.getJSONObject(0).get("dummy")?:""

if the result value is null it return empty string,

and if you want to get null you should remove .toString()

answered Feb 4, 2022 at 8:38

Rahul Mishra

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Comments

Ivo · Accepted Answer · 2022-02-04 09:06:39Z

1

You can check

jsonList.getJSONObject(0).get("dummy") == JSONObject.NULL

It will hold true in your case

So you could do something like this

val dummy = jsonList.getJSONObject(0).get("dummy")
val dummyString = if (dummy == JSONObject.NULL) null else dummy.toString()

answered Feb 4, 2022 at 9:06

Ivo

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