/**
  * 修改文件名字
  *
  * @param _id
  * @param newName
  * @param oldName
  */
 public void reName(String _id, final String newName, final String oldName) {
   FileData fileData = new FileData(activity);
   fileData.updateName(_id, newName);
   handler.sendEmptyMessage(REFRESH);
   new Thread() {
     public void run() {
       String source = sharePath + "/" + oldName;
       String target = sharePath + "/" + newName;
       boolean flag = new BcsService().rename(source, target);
       Message msg = handler.obtainMessage();
       msg.what = RENAME;
       if (flag) {
         msg.obj = "命名成功";
       } else {
         msg.obj = "命名失败";
       }
       handler.sendMessage(msg);
     }
   }.start();
 }