How to create a string list from a JSONArray?

Question

I have a jsonArray object like the "Input" below. I would like the "Output". Could you help me ?

Input :

"["a", "b", "c", "d"]"

Output :

["a", "b", "c", "d"]

//i need a simple list of string

I have found a solution but it's too complex for a simple conversion....

        val errorFields = jsonResponse.getJSONArray("my_array")
                .join(",")
                .replace("\"", "")
                .split(",")

This seems like a duplicate of https://stackoverflow.com/questions/17037340/converting-jsonarray-to-arraylist But in Kotlin — Lucas Mendonca, Oct 10 '19 at 16:23

score 1 · Accepted Answer · answered Oct 10 '19 at 16:44

1

By manual parsing you can get a list of string from jsonArray by -

val list = ArrayList<String>()
repeat(jsonArray.length){
    list.add(jsonArray.getString(it))
}

If you are using parsing library gson than you can get a list of strings by -

val list = gson.fromJson(jsonArray.toString(), Array<String>::class.java)?.toList()

answered Oct 10 '19 at 16:44

Naresh NK

1,036
1
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16

i enjoy your solution with gson – diAz Oct 11 '19 at 10:06

Squti · Answer 2 · 2019-10-10T16:27:25.573

0

You could do it like so:

    val stringList : MutableList<String> = arrayListOf()
    jsonArray?.let {
        for (i in 0 until it.length()) {
            stringList.add(jsonArray.getString(i))
    }

edited Oct 10 '19 at 16:27

answered Oct 10 '19 at 16:19

Squti

4,171
3
10
21

score 0 · Answer 3 · answered Oct 10 '19 at 16:33

0

You can do this way in Koltin

var str = "[\"a\", \"b\", \"c\", \"d\"]" var items = Arrays.asList(str?.split("\\s*,\\s*")).flatten()

flatten is needed as it returns a list of lists.

answered Oct 10 '19 at 16:33

Ranjeet

393
2
10

How to create a string list from a JSONArray?

3 Answers3