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example_data.json

[
    {
        "id": "ce13eccc-0054-4189-8b95-047f6e094303",
        "short": "dflm",
        "name": "TEST",
        "zone": 122,
        "type": "como",
        "registration_plate": "",
        "added": "2019-05-29T11:23:40.062842Z",
        "serial": null,
        "model_specification": null,
        "status": "ready",
        "bounty": 0,
        "location": [
            60.45579147338867,
            22.301254272460938
        ],
        "battery": 57,
        "locked": true,
        "updated": "2019-11-20T03:46:19Z",
        "mileage": 0
    }
]

stacktrace.log

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: fi.samipsolutions.voitracker, PID: 9573
    java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:502)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) 
     Caused by: org.json.JSONException: Value {"id":"ce13eccc-0054-4189-8b95-047f6e094303","short":"dflm","name":"TEST","zone":122,"type":"como","registration_plate":"","added":"2019-05-29T11:23:40.062842Z","serial":null,"model_specification":null,"status":"ready","bounty":0,"location":[60.45586395263672,22.301359176635742],"battery":52,"locked":true,"updated":"2019-11-20T04:33:23Z","mileage":0} at 0 of type org.json.JSONObject cannot be converted to JSONArray
        at org.json.JSON.typeMismatch(JSON.java:101)
        at org.json.JSONArray.getJSONArray(JSONArray.java:502)
        at fi.samipsolutions.voitracker.activities.MainActivity$loadVehicles$jsonArrayRequest$1.onResponse(MainActivity.kt:43)
        at fi.samipsolutions.voitracker.activities.MainActivity$loadVehicles$jsonArrayRequest$1.onResponse(MainActivity.kt:17)
        at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:90)
        at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:102)
        at android.os.Handler.handleCallback(Handler.java:883)
        at android.os.Handler.dispatchMessage(Handler.java:100)
        at android.os.Looper.loop(Looper.java:214)
        at android.app.ActivityThread.main(ActivityThread.java:7356)
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930) 

the_code.kt

private fun loadVehicles() {
        // Instantiate the RequestQueue
        val queue = Volley.newRequestQueue(this)
        val builder = StringBuilder()
        val url = builder
            .append("https://")
            .append("<api-url-censored>")
            .append("vehicle/status/ready?")
            .append("lat=<censored>&lng=<censored>).toString()
        Log.i("JSON_URL", url)
        // Create request and listeners
        val jsonArrayRequest = JsonArrayRequest(
            Request.Method.GET, url, null,
            Response.Listener { response ->
                val json_data = response.getJSONArray(0)
                for(i in 0 until json_data.length()) {
                    val item = json_data.getJSONObject(i)
                    if (item["type"] != "como") {
                        Log.d("JSON_SUCCESS", item["type"].toString())
                    }
                }
            },
            Response.ErrorListener { error ->
                Log.d("JSON_ERROR",error.toString())
            }
        )
        // Add the request to the RequestQueue.
        queue.add(jsonArrayRequest)
    }

Remove

val json_data = response.getJSONArray(0)

and replace

for(i in 0 until json_data.length()) {
val item = json_data.getJSONObject(i)

by

for(i in 0 until response.length()) {
val item = response.getJSONObject(i)

Oh, Wow. I feel stupid for not thinking of doing it like that. Thank you. It works. :)

Okay . FYI Stupids only can learn quick than others :-) Don't feel for mistakes 👍