用Retrofit+Rxjava上传图片支持多张图片的上传

1.这是一个接口

    @POST
    Observable Image(@Url String url, @HeaderMap Map headermap,@Body MultipartBody body);

第一个是上传一个 第二个是上传多个

下面这个是一个Retrofit 封装好的工具类

public class Retrofits{
    private MyApiService myApiService;

    public Retrofits() {
        HttpLoggingInterceptor loggingInterceptor =new HttpLoggingInterceptor();
        loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        OkHttpClient okHttpClient =new OkHttpClient.Builder()
                .readTimeout(20,TimeUnit.SECONDS)
                .connectTimeout(20,TimeUnit.SECONDS)
                .writeTimeout(20,TimeUnit.SECONDS)
                .addInterceptor(loggingInterceptor)
                .retryOnConnectionFailure(true)
                .build();
        Retrofit retrofit =new Retrofit.Builder()
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
//                存放的头文件
                .baseUrl(Contacts.BASE_URL)
                .client(okHttpClient)
                .build();
        myApiService =retrofit.create(MyApiService.class);
    }

    public static  Retrofits getInstance(){
        return RetroHolder.OK_UTIL;
    }

    static class RetroHolder{
        private static final Retrofits OK_UTIL =new Retrofits ();
    }
    /**
     * 封装一个上传图片
     */
    public OkUtil image(String murl,Map headermap,Map map,List