remote_camera.rb

require 'android'
require 'webrick'

pic = '/sdcard/snapshot.jpg'
droid = Android.new
httpd = WEBrick::HTTPServer.new(:Port => 9998)

httpd.mount_proc('/') do |req, res|
  return unless req.path == '/'
  droid.cameraCapturePicture(pic)
  res['Content-Type'] = 'image/jpeg'
  res.body = open(pic).read
end

httpd.start