在kotlin中使用retrofit+rxjava2

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首先创建个retrofit的单列

/** * Created by JokAr on 2017/6/5. */class NetworkConfig private constructor() {    private val DEFAULT_TIMEOUT: Long = 15    private val BASE_URL: String = "http://gank.io/api"    var retrofit: Retrofit = initRetrofit()    private object Holder { val INSTANCE = NetworkConfig() }    companion object{        val instance:NetworkConfig by lazy { Holder.INSTANCE }    }    private fun initRetrofit(): Retrofit {        val interceptor = HttpLoggingInterceptor()        if (BuildConfig.DEBUG)            interceptor.setLevel(HttpLoggingInterceptor.Level.BODY)        else            interceptor.setLevel(HttpLoggingInterceptor.Level.NONE)        val client = OkHttpClient.Builder()                .addInterceptor(interceptor)                .retryOnConnectionFailure(true)                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)                .build()        return  Retrofit.Builder()                .baseUrl(BASE_URL + "/")                .client(client)                .addConverterFactory(GsonConverterFactory.create())                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())                .build()    }}

然后创建请求service

/** * Created by JokAr on 2017/6/5. */interface DataService {    @GET("data/{type}/{count}/{pageSize}")    fun getData(@Path("type") type: String,                @Path("count") count: Int,                @Path("pageSize") pageSize: Int)            : Observable<HttpResult<ArrayList<DataEntities>>>}

其中HttpResult和DataEntities元素类为

/** * Created by JokAr on 2017/6/5. */data class DataEntities(@SerializedName("_id") var _id: String,                        @SerializedName("createdAt") var createdAt: String,                        @SerializedName("desc") var desc: String,                        @SerializedName("publishedAt") var publishedAt: String,                        @SerializedName("source") var source: String,                        @SerializedName("type") var type: String,                        @SerializedName("url") var url: String,                        @SerializedName("used") var used: Boolean,                        @SerializedName("who") var who: String) : Parcelable {    companion object {        @JvmField val CREATOR: Parcelable.Creator<DataEntities> = object : Parcelable.Creator<DataEntities> {            override fun createFromParcel(source: Parcel): DataEntities = DataEntities(source)            override fun newArray(size: Int): Array<DataEntities?> = arrayOfNulls(size)        }    }    constructor(source: Parcel) : this(    source.readString(),    source.readString(),    source.readString(),    source.readString(),    source.readString(),    source.readString(),    source.readString(),    1 == source.readInt(),    source.readString()    )    override fun describeContents() = 0    override fun writeToParcel(dest: Parcel, flags: Int) {        dest.writeString(_id)        dest.writeString(createdAt)        dest.writeString(desc)        dest.writeString(publishedAt)        dest.writeString(source)        dest.writeString(type)        dest.writeString(url)        dest.writeInt((if (used) 1 else 0))        dest.writeString(who)    }}

/** * Created by JokAr on 2017/6/5. */data class HttpResult<T>(@SerializedName("error") var error: Boolean,                         @SerializedName("results") var results: T?)

然后就是使用方法了

 NetworkConfig.instance                .retrofit                .create(DataService::class.java)                .getData("Android", 10, 1)                .subscribeOn(Schedulers.io())                .unsubscribeOn(Schedulers.io())                .map(HttpResultFunc())                .observeOn(AndroidSchedulers.mainThread())                .subscribe({                    result ->                    Log.d("Kotlin", result.toString())                }, {                    error ->                    error.printStackTrace()                }, {                    Log.d("Kotlin", "onComplete")                }, {                    Log.d("Kotlin", "onStart")                })

其中HttpResultFunc为：

/** * Created by JokAr on 2017/6/5. */class HttpResultFunc<T> :Function<HttpResult<T>,T> {    override fun apply(tHttpResult: HttpResult<T>?): T {        if (tHttpResult != null) {            if (tHttpResult?.error) {                throw APIException()            }        }        return tHttpResult?.results as T    }}

END

到此就结束了，跟在java中使用没多大区别，就只是在最后的subscribe有点区别,在代码中已注明

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