@PartMap parameters can only be used with multipart encoding. (parameter #6)

使用retrofit框架上传多张图片时报错

@PartMap parameters can only be used with multipart encoding. (parameter #6)

解决办法：

@Multipart   //需要增加这一句注解
@POST("gateway.ashx?cmd=publish")
Flowable<PublishModel> publish(@Query("uid") String uid,
                               @Query("title") String title,
                               @Query("desc") String desc,
                               @Query("start-time") String start_time,
                               @Query("expire-time") String expire_time,
                               @PartMap Map<String, RequestBody> imgs,
                               @Query("lon") double lon,
                               @Query("lat") double lat,
                               @Query("address") String address,
                               @Query("sign") String sign);