GET-KOTLIN

        val client = OkHttpClient()
            val request = Request.Builder()
                    .url("http://192.168.100.70:3000/amigosApi/grp/category/group/$id")
                    .build()
            val response = client.newCall(request).execute()

            response.body()?.let {
                val data = Gson().fromJson(it.string(), Array<GroupData>::class.java)
                Log.d("xtx", data.size.toString())
                uiThread {
                    if (data.isNotEmpty())
                        recyclerView.adapter = GroupAdaptor(data, this@GroupActivity)
                    else {
                        Toast.makeText(this@GroupActivity, "No data found", Toast.LENGTH_SHORT).show()
                    }
                    refreshLayout.isRefreshing = false
                }
            }