JSONArrayExtension.kt

fun JSONArray.sort(keyName: String): JSONArray {
    val sortedJsonArray = JSONArray()

    val jsonValues = arrayListOf<JSONObject>()
    for (a in 0 until length())
        jsonValues.add(getJSONObject(a))

    jsonValues.sortWith { a, b ->
        val valA = a.getStringSafe(keyName) ?: a.get(keyName) as String
        val valB = b.getStringSafe(keyName) ?: b.get(keyName) as String

        valA.compareTo(valB, true)
    }

    for (k in 0 until length())
        sortedJsonArray.put(jsonValues[k])

    return sortedJsonArray
}