File imageFile = new File(imagePath);

    ToolUtils.Log("imageFile = "+imageFile.getPath());
    String imageName = splitPath(imagePath);
    RequestBody requestBody = RequestBody.create(MediaType.parse("multipart/form-data"),imageFile);
    //RequestBody requestBody = RequestBody.create(MediaType.parse("image/jpg"),imageFile);
    
    两种方式构建RequestBody对象php后台得到的type都为applicattion/json
    是否是因为.addConverterFactory(GsonConverterFactory.create())的原因？