kotlin achieve ListView

Sub-layout files

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/img"
        android:layout_centerVertical="true"
        />
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@id/img"
        android:id="@+id/titles"
        />

</RelativeLayout>

Master layout file

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Demo">

    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/list"
        ></com.handmark.pulltorefresh.library.PullToRefreshListView>

</android.support.constraint.ConstraintLayout>

The main class

class Demo : AppCompatActivity() {
    companion object {
        var lists : ArrayList<Map<String,String>> = ArrayList()
        var adapter:MyAdapter? = null
    }

    var page: Int = 1

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

        adapter = MyAdapter(this, lists)
        list.setAdapter(adapter)

        var ss:String = "http://www.qubaobei.com/ios/cf/dish_list.php?stage_id=1&limit=10&page = 1";
        //调用下载方法
        download(ss)

    }

// download method

fun download(ss:String){
        Thread(Runnable {
            var readText = URL(ss).readText()
            var jsonObject = JSONObject(readText)
            var jsonArray:JSONArray = jsonObject.getJSONArray("data")
            for (arr in 0..jsonArray.length()-1 step 1){
                var jo = jsonArray.getJSONObject(arr)
                var string = jo.getString("pic")
                var title = jo.getString("title")
                var map = HashMap<String, String>()
                map.put("pic",string)
                map.put("title",title)
                lists.add(map)
            }
            Demo.adapter!!.notifyDataSetChanged()
        }).start()
    }

adapter

class MyAdapter(context: Context, lists: ArrayList<Map<String, String>>) : BaseAdapter() {

    var context: Context = context
    var lists: ArrayList<Map<String, String>> = lists

    override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
        var view = View.inflate(context, R.layout.item, null)
        var img: ImageView = view.findViewById(R.id.img);
        var title: TextView = view.findViewById(R.id.titles)
        var map = lists.get(position)
        title.setText(map.get("title"))
        Picasso.with(context).load(map.get("pic")).into(img)
        return view
    }

    override fun getItem(position: Int): Any {
        return lists.get(position)
    }

    override fun getItemId(position: Int): Long {
        return position.toLong()
    }

    override fun getCount(): Int {
        return lists.size
    }

}

Renderings