前几天开发安卓要用到文件批量上传，就是上传图片，视频，文件之类的用到Xutil3框架，用

RequestParams params = new RequestParams(url);params.addParameter("file", new File(file));只能上传单张，不可能上传多张于是采用for循环，for（int i=0;i
     
      () {        @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)        @Override        public void onSuccess(String s) {            try {                JSONObject obj = new JSONObject(s);                               }            } catch (Exception e) {                e.printStackTrace();            }        }        @Override        public void onError(Throwable throwable, boolean b) {            Toast.makeText(AttendanceActivity.this, "错误:" + throwable.getMessage(), Toast.LENGTH_SHORT).show();        }        @Override        public void onCancelled(CancelledException e) {        }        @Override        public void onFinished() {        }        @Override        public boolean onCache(String s) {            return false;        }    });}
     

还是不行后发现研究api 发现文件需要

multipart/data  刚好xutil3 有MultipartBody这个类，所有就有了File file = new File(upFileName);    List
     
       list = new ArrayList
      
       ();    list.add(new KeyValue("file",file));    MultipartBody body=new MultipartBody(list,"UTF-8");    params.setRequestBody(body);    params.setMultipart(true);    x.http().post(params, new org.xutils.common.Callback.CacheCallback
       
        () {        @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1)        @Override        public void onSuccess(String s) {            try {                JSONObject obj = new JSONObject(s);                  }            } catch (Exception e) {                e.printStackTrace();            }        }        @Override        public void onError(Throwable throwable, boolean b) {            Toast.makeText(AttendanceActivity.this, "错误:" + throwable.getMessage(), Toast.LENGTH_SHORT).show();        }        @Override        public void onCancelled(CancelledException e) {        }        @Override        public void onFinished() {        }        @Override        public boolean onCache(String s) {            return false;        }    });
       
      
     

关键代码

List
     
       list = new ArrayList
      
       ();    list.add(new KeyValue("file",file));    MultipartBody body=new MultipartBody(list,"UTF-8");    params.setRequestBody(body);
      
     

这样就完美解决xutil3 批量文件上传了