compile 'io.reactivex.rxjava2:rxandroid:2.0.1'
compile 'io.reactivex.rxjava2:rxjava:2.1.7'
compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'com.squareup.retrofit2:adapter-rxjava2:2.3.0'
compile 'com.squareup.retrofit2:converter-gson:2.3.0'
//    compile 'com.google.code.gson:gson:2.8.2'
compile 'com.liaoinstan.springview:library:1.2.6'
 
compile 'com.github.liuguangqiang.SuperRecyclerView:super-recyclerview:0.1.2'
compile 'com.github.bumptech.glide:glide:3.7.0'

Bean

package app.my.com.kotlin

/**
 * Created by lenovo on 2017/12/14.
 */
data class Bean(
        val msg: String,
        val code: String, //0
val data: List<Data>
)

data class 
 
Data(
        val cid: Int, //1
val createtime: String, //2017-10-10T19:41:39
val icon: String, //http://120.27.23.105/images/category/shop.png
val ishome: Int, //1
val name: String //京東超市
)

IService

package app.my.com.kotlin

import io.reactivex.Observable
import okhttp3.ResponseBody
import retrofit2.http.GET
/**
 * Created by lenovo on 2017/12/14.
 
 */
interface IService {
    //http://120.27.23.105/product/getCatagory
@GET("/product/getCatagory")
    fun getData() : Observable<ResponseBody>
}

MainActivity

package app.my.com.kotlin

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.support.v7.widget.LinearLayoutManager
import com.google.gson.Gson
import io.reactivex.android.schedulers.AndroidSchedulers
import io.reactivex.schedulers.Schedulers
import kotlinx.android.synthetic.main.activity_main.*
import retrofit2.Retrofit
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory

class MainActivity : AppCompatActivity() {

    lateinit var adapter : IAdapter

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

        recyclerview.layoutManager = LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false)
        adapter =  IAdapter(this)
        recyclerview.adapter =adapter
getData()

    }

    fun getData(){

        var retrofit = Retrofit.Builder()
                .baseUrl("http://120.27.23.105")
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build()

        var iservice : IService =  retrofit.create(IService::class.java)

        iservice.getData()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe( {
next ->
var result =  next.string()
                    println(result)

                    var gson = Gson()
                    var bean = gson.fromJson(result,Bean::class.java)

                    adapter.addData(bean)

                } , {
t ->
                } )
    }

}

IAdapter

package app.my.com.kotlin

import android.content.Context
import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import com.bumptech.glide.Glide

/**
 * Created by lenovo on 2017/12/14.
 */
class IAdapter(context1 : Context) : RecyclerView.Adapter<IAdapter.IViewHodler>() {

    var context : Context = context1

    var list : ArrayList<Data> = ArrayList()

    
    fun addData(bean: Bean) {

        list.addAll(bean.data)

        notifyDataSetChanged()
    }


    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): IViewHodler {
//        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
var view = LayoutInflater.from(context).inflate(R.layout.layout,parent,false)
        return IViewHodler(view)
        
    }

    
    override fun onBindViewHolder(holder: IViewHodler?, position: Int) {
//        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
holder!!.item_textview.setText(list.get(position).name)

        Glide.with(context).load(list.get(position).icon).into(holder!!.item_imageview)
        
    }
    

    override fun getItemCount(): Int {
//        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
return list.size
}


    class IViewHodler(view : View) : RecyclerView.ViewHolder(view) {
        
        lateinit var item_imageview : ImageView
        lateinit var item_textview : TextView

        init {
            item_imageview = view.findViewById(R.id.item_imageview)
            item_textview = view.findViewById(R.id.item_textview)
        }

    }

}