[Kotlin] import org.json.*

MainActivity.kt

package com.jwsoft.kotlinproject

import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import org.json.JSONException
import org.json.JSONObject

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        try {
            val jsonString = "{" +
                    " 'name':'James Kim'," +
                    " 'age':30," +
                    " 'hobby':['music', 'movie']," +
                    " 'privacy':{ 'height':184, 'weight':84 }" +
                    " }"

            var jsonObject = JSONObject(jsonString)

            Log.e("jsonObject", jsonObject.toString())
            Log.e("name", jsonObject.getString("name"))
            Log.e("age", jsonObject.getInt("age").toString())

            var hobbyArray = jsonObject.getJSONArray("hobby")
            Log.e("hobby", hobbyArray.toString())
            for (i in 0 until hobbyArray.length()) {
                Log.e("hobby $i", hobbyArray.get(i).toString())
            }

            var privacyObject = jsonObject.getJSONObject("privacy")
            Log.e("privacy", privacyObject.toString())
            Log.e("height", privacyObject.getInt("height").toString())
            Log.e("weight", privacyObject.getInt("weight").toString())

        } catch (e: JSONException) {
            e.printStackTrace()
        }
    }

}

실행 결과

 

 

 

 

 

 

 

---

MainActivity.kt

package com.jwsoft.kotlinproject

import android.os.Bundle
import android.util.Log
import androidx.appcompat.app.AppCompatActivity
import org.json.JSONArray
import org.json.JSONException
import org.json.JSONObject

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        try {
            var jsonObject = JSONObject()
            jsonObject.put("name", "James Kim")
            jsonObject.put("age", 30)

            var hobbyArray = JSONArray()
            hobbyArray.put("music")
            hobbyArray.put("movie")
            jsonObject.put("hobby", hobbyArray)

            var privacyObject = JSONObject()
            privacyObject.put("height", 184)
            privacyObject.put("weight", 84)
            jsonObject.put("privacy", privacyObject)

            Log.e("jsonObject", jsonObject.toString())
            Log.e("name", jsonObject.getString("name"))
            Log.e("age", jsonObject.getInt("age").toString())

            var arrHobby = jsonObject.getJSONArray("hobby")
            Log.e("hobby", arrHobby.toString())
            for (i in 0 until arrHobby.length()) {
                Log.e("hobby $i", arrHobby.get(i).toString())
            }

            var jsonPrivacy = jsonObject.getJSONObject("privacy")
            Log.e("privacy", jsonPrivacy.toString())
            Log.e("height", jsonPrivacy.getInt("height").toString())
            Log.e("weight", jsonPrivacy.getInt("weight").toString())

        } catch (e: JSONException) {
            e.printStackTrace()
        }
    }

}

실행 결과