listtest.kt

package com.example.ashia.filereadtest

import android.content.Context
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.View
import android.widget.AdapterView
import android.widget.ListView
import android.widget.SimpleAdapter
import android.widget.Toast
import java.util.*



data class TestData(val name: String, val price: Int, val desc: String){

}

public class MainActivity : AppCompatActivity() {

    private fun makeData(name: String, price: Int, desc: String): Map<String, Any>{
        var res = HashMap<String, Any>();
        res.put("name", name);
        res.put("price", price.toString() + "(" + (price*1.08).toString() +")");
        res.put("data", TestData(name, price, desc));
        return res;




    }

    protected class ListItemClickListener(val context: Context): AdapterView.OnItemClickListener{
        override fun onItemClick(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
            if (parent == null){
                Toast.makeText(context,"no", Toast.LENGTH_LONG).show();
            }else {
                val item = parent.getItemAtPosition(position) as Map<String, Any>;
                val data = item["data"] as TestData;
                Toast.makeText(context, data.desc, Toast.LENGTH_LONG).show();
            }
        }

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


        val lvMenu = findViewById<ListView>(R.id.lvMenu);
        val menuList = mutableListOf<Map<String, Any>>();

        menuList.add(makeData("Agedofu", 100, "Fried tofu"));
        menuList.add(makeData("Inari", 200, "Sushi of fried tofu"));
        menuList.add(makeData("Kinudofu",  150, "Smooth tofu"));

        val from = arrayOf("name", "price");
        val to = intArrayOf(android.R.id.text1, android.R.id.text2);
        Toast.makeText(this,"Hello!", Toast.LENGTH_LONG).show();

        val adapter = SimpleAdapter(this, menuList, android.R.layout.simple_list_item_2, from, to);
        lvMenu.adapter = adapter;
        lvMenu.setOnItemClickListener(ListItemClickListener(this.applicationContext));



    }
}