Kotlin + RecyclerView + JSON 연동 테스트

<MainActivity.kt>

//Reference : https://m.blog.naver.com/PostView.nhn?blogId=cosmosjs&logNo=221208701289&proxyReferer=https%3A%2F%2Fwww.google.co.kr%2F
//Reference : https://cocomo.tistory.com/412
// Reference : https://m.blog.naver.com/cosmosjs/221205326784
// Reference : https://www.raywenderlich.com/1560485-android-recyclerview-tutorial-with-kotlin

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.VERTICAL, false);

        fetchJson()
    }

    fun fetchJson(){
        val url = URL("Webpage address")
        val request = Request.Builder().url(url).build()
        val client = OkHttpClient()
        client.newCall(request).enqueue(object : Callback{
            override fun onResponse(call: Call?, response: Response?){
                val body = response?.body()?.string()
                //Toast.makeText(applicationContext, "Sucess to execute request! : $body", Toast.LENGTH_SHORT).show()

                Log.d("JSON","Sucess to execute request! : $body")

                val gson = GsonBuilder().create()
                val list = gson.fromJson(body, JsonObj::class.java)

                runOnUiThread{
                    recyclerView.adapter = RecyclerAdapter1(list)
                }
            }

            override fun onFailure(call: Call?, e: IOException?){
                println("Failed to execute request!");
            }
        })

    }
}

class RecyclerAdapter1(private val myList: JsonObj) :
    RecyclerView.Adapter<RecyclerAdapter1.ViewHolder>() {

    override fun getItemCount():Int{
        return myList.result.count()
    }


    override fun onBindViewHolder(holder: RecyclerAdapter1.ViewHolder, position: Int) {
        val item = myList.result[position]
        val listener = View.OnClickListener {it ->
            Toast.makeText(it.context, "Clicked: ${item.Commandname}", Toast.LENGTH_SHORT).show()
        }
        holder.apply {
            bind(listener, item)
            itemView.tag = item
        }
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int):
            RecyclerAdapter1.ViewHolder {
        val inflatedView = LayoutInflater.from(parent.context)
            .inflate(R.layout.item_raw, parent, false)
        return RecyclerAdapter1.ViewHolder(inflatedView)
    }

    class ViewHolder(v: View) : RecyclerView.ViewHolder(v) {

        private var view: View = v

        fun bind(listener: View.OnClickListener, item: CommandInfo) {
            view.bt_commandname.text = item.Commandname
            view.tv_commandno.text = item.CommandNo.toString()
            view.setOnClickListener(listener)
        }
    }
}

data class JsonObj(val result: List<CommandInfo>)
data class CommandInfo(val Commandname:String, val CommandNo:Int){

}

 

<Webpage.php>

<?php
	//쿼리
	$Conn= Connect2DB();
	$Query1 = "Query Statement";
	$QueryResults = mysqli_query($Conn, $Query1);

	while ($Row1 = mysqli_fetch_array($QueryResults)) {

		$res['Commandname'] = $Row1['Commandname'];
		$res['CommandNo'] = $Row1['CommandNo'];
		$arr["result"][] = $res;
	}
	
	$json = json_encode ($arr);
	$json = urldecode ($json);
	print $json;
	DisconnectDB($Conn);
}

function h_DisconnectDB($Conn){
	if($Conn != null) mysqli_close($Conn);
}
?>