retrofit upload files with parameters

  @Multipart
  @POST("postFied")
  Call<Void> postFied(@PartMap Map<String,String> map, @Part MultipartBody.Part file);



File file=new File("/sdcard/shumei.txt");
        RequestBody  body=RequestBody.create(MediaType.parse("application/octet-stream"),file);
//        RequestBody  body=RequestBody.create(MediaType.parse("multipart/form-data"),file);
        MultipartBody.Part part =MultipartBody.Part.createFormData("file",file.getName(),body);
        Map<String, String> map = new HashMap<>();
        map.put("name","123456");
        Call<Void> liing = api.postFied(map,part);