Kontlin之Rx+Retrofit实战(豆瓣列表)

应用宝动态截屏2017051901.gif

用到的资源库

    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    compile 'io.reactivex:rxjava:1.1.0'
    compile 'io.reactivex:rxandroid:1.1.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.0-beta4'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0-beta4'
    compile 'com.squareup.retrofit2:adapter-rxjava:2.0.0-beta4'
    compile 'org.jetbrains.anko:anko-sdk15:0.8.2'
    compile 'org.jetbrains.anko:anko-support-v4:0.8.2'
    compile 'org.jetbrains.anko:anko-appcompat-v7:0.8.2'
    compile 'com.google.code.gson:gson:2.6.2'
    compile 'com.github.bumptech.glide:glide:4.0.0-RC0'

实体类

package demo.kotlin.rxretrofit

/**
 * Created by gjl on 2017/5/18.
 */
data class MovieEntity(
        var count: Int = 0,
        var start: Int = 0,
        var total: Int = 0,
        var title: String? = null,
        var subjects: List? = null) {
    data class SubjectsBean(
            var rating: RatingBean? = null,
            var title: String? = null,
            var collect_count: Int = 0,
            var original_title: String? = null,
            var subtype: String? = null,
            var year: String? = null,
            var images: ImagesBean? = null,
            var alt: String? = null,
            var id: String? = null,
            var genres: List? = null,
            var casts: List? = null,
            var directors: List? = null) {
        data class RatingBean(
                private var max: Int = 0,
                private var average: Double = 0.0,
                private var stars: String? = null,
                private var min: Int = 0) {}

        data class ImagesBean(
                var small: String? = null,
                var large: String? = null,
                var medium: String? = null) {}

        data class DirectorsBean(
                var alt: String? = null,
                var avatars: AvatarsBean? = null,
                var name: String? = null,
                var id: String? = null) {}

        data class CastsBean(
                var alt: String? = null,
                var avatars: AvatarsBean? = null,
                var name: String? = null,
                var id: String? = null) {}

        data class AvatarsBean(
                var small: String? = null,
                var large: String? = null,
                var medium: String? = null) {}
    }
}

activity

class Main3Activity : AppCompatActivity() {

    var text_view: TextView? = null
    var my_adpter: MyAdapter? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        Main3ActivityUI(this).setContentView(this)
    }

    class Main3ActivityUI(var activity: Main3Activity) : AnkoComponent {
        override fun createView(ui: AnkoContext) = with(ui) {
            var list = ArrayList()
            activity.my_adpter = MyAdapter(list)
            verticalLayout {
                fitsSystemWindows = true
                activity.text_view = textView("标题") {
                    textColor = Color.BLUE
                    textSize = 25f
                    background = ColorDrawable(Color.CYAN)
                    paddingHorizontal = 35
                    gravity = Gravity.CENTER
                }.lparams(matchParent, wrapContent)
                listView() {
                    adapter = activity.my_adpter
                    onItemClick { adapterView, view, i, l -> show(i) }
                }.lparams(matchParent, matchParent) {
                    weight = 1f
                }
                button("点我") {
                    textColor = Color.RED
                    textSize = 20F
                    onClick { activity.getMovie() }
                }.lparams(wrapContent, wrapContent) {
                    gravity = Gravity.CENTER
                }
            }
        }

        fun show(i:Int){
            val subjectsBean = activity.my_adpter?.getItem(i)
            activity.toast(subjectsBean?.original_title.toString())
        }

    }

    fun getMovie() {
        text_view?.text = "正在请求,请稍后..."
        HttpMethods3.getInstance().getTopMovie1(object : Subscriber() {
            override fun onNext(t: MovieEntity?) {
                if (t != null) {
                    text_view?.text = t.title
                    my_adpter?.list = t.subjects!!
                    my_adpter?.notifyDataSetChanged()
                }
            }

            override fun onCompleted() {
            }

            override fun onError(e: Throwable?) {
                text_view?.text = "请求失败,请重试"
            }

        }!!, 0, 10)
    }

    class MyAdapter(var list: List) : BaseAdapter() {

        override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
            val subjectsBean = getItem(position)
            val inflate = View.inflate(parent?.context, R.layout.layout_item, null)
            Glide.with(parent).load(subjectsBean.images?.small).into(inflate.find(R.id.iv_icon))
            inflate.find(R.id.tv_title).text = subjectsBean.title+"\n"+subjectsBean.year
            return inflate
        }

        override fun getItem(position: Int) = list.get(position)

        override fun getItemId(position: Int) = position.toLong()

        override fun getCount() = list.size


    }
}

网络请求

class HttpMethods3{

    val BASE_URL = "https://api.douban.com/v2/movie/"
    var retrofit: Retrofit?=null
    var movieService: MovieService?=null
    private constructor() {
        var httpClientBuilder: OkHttpClient.Builder = OkHttpClient.Builder()

        retrofit = Retrofit.Builder()
                .client(httpClientBuilder.build())
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .baseUrl(BASE_URL)
                .build()
        movieService = retrofit?.create(MovieService::class.java)
    }

    companion object{
        fun getInstance() = Holder.instance
    }

    private object Holder{
        val instance = HttpMethods3()
    }

    /**
     * 用于获取豆瓣电影Top250的数据
     * @param subscriber 由调用者传过来的观察者对象
     * @param start 起始位置
     * @param count 获取长    */
    fun getTopMovie1(subscriber: Subscriber, start:Int, count:Int){
        movieService?.getTopMovie(start, count)
                ?.subscribeOn(Schedulers.io())
                ?.unsubscribeOn(Schedulers.io())
                ?.observeOn(AndroidSchedulers.mainThread())
                ?.subscribe(subscriber)
    }
}
==============================================================================
/**
 * Created by gjl on 2017/5/18.
 */
interface MovieService {
    @GET("top250")
    abstract fun getTopMovie(@Query("start") start: Int, @Query("count") count: Int): Observable
}

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