Retrofit的使用

参照文档：http://gank.io/post/56e80c2c677659311bed9841

一、创建Retrofit

        mRetrofit = new Retrofit.Builder()
                .baseUrl(URL_PATH)//设置URL地址
                .addConverterFactory(GsonConverterFactory.create())//设置使用Gson解析
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())//设置使用RXJAVA的形式，如果不设置则为OkHttp的模式
                .build();//创建Retrofit

二、设置接收使用的javaBean（成员变量名为json的键，如果是jsonArray则需要使用List<>封装）

public class HttpResult<T> {

    private int count;
    private int start;
    private int total;
    private String title;

    //用来模仿Data
    private T subjects;


    public int getCount() {
        return count;
    }

    public void setCount(int count) {
        this.count = count;
    }

    public int getStart() {
        return start;
    }

    public void setStart(int start) {
        this.start = start;
    }

    public int getTotal() {
        return total;
    }

    public void setTotal(int total) {
        this.total = total;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }


    public T getSubjects() {
        return subjects;
    }

    public void setSubjects(T subjects) {
        this.subjects = subjects;
    }


    @Override
    public String toString() {
        StringBuffer sb = new StringBuffer();
        sb.append("title=" + title + " count=" + count + " start=" + start);
        if (null != subjects) {
            sb.append(" subjects:" + subjects.toString());
        }
        return sb.toString();
    }
}

三、设置传输接口

public interface DouBanApi {
    @GET("top250")//变量地址

    Observable<HttpResult<List<Subject>>> getMovies(@Query("start")int start,@Query("count")int count);
 }//Query表示需要上传的参数名

四、设置回调接口

   DouBanApi douBanApi = mRetrofit.create(DouBanApi.class);
        Observable<HttpResult<List<Subject>>> observable = douBanApi.getMovies(start,count);
        observable.subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Subscriber<HttpResult<List<Subject>>>() {
                    @Override
                    public void onCompleted() {

                    }

                    @Override
                    public void onError(Throwable e) {

                    }

                    @Override
                    public void onNext(HttpResult<List<Subject>> listHttpResult) {

                    }
                });
    }