如何从andorid客户端上传图片到服务器？

1， 一种方案
构造form表单， 这个很典型，不过会有些小问题。

2， base64编码
参考如下的类

class Album

  has_attached_file :cover_image, :storage => :s3
  attr_accessor :cover_image_data
  before_validation :decode_cover_image_data,
    :if => :cover_image_data_provided?

  private

  def cover_image_data_provided?
    !self.cover_image_data.blank?
  end

  def decode_cover_image_data
    # If cover_image_data is set, decode it and hand it over to Paperclip
    data = StringIO.new(Base64.decode64(self.cover_image_data))
    data.class.class_eval { attr_accessor :original_filename, :content_type }
    data.original_filename = "cover.png"
    data.content_type = "image/png"
    self.cover_image = data
  end

end