How to mail a screen captured image using corona SDK

For doing this, you have to:

• First create a localgroup.
• Then add the screen objects to that group.
• Return the display group
• Use display.save to save the entire group displayed.
• Create mail option and add attachment image from baseDirectory
• Call mail Popup

Example: 

-- creating the display group --
local localGroup = display.newGroup()  

-- creating display objects and adding it to the group --
local bg = display.newRect(0,0,320,480)
bg.x = 160
bg.y = 240
bg:setFillColor(150)
localGroup:insert(bg)

local rect = display.newRect(0,0,50,50)
rect.x = 30+math.random(260)
rect.y = 30+math.random(420)
localGroup:insert(rect)

-- Then do as follows --
local function takePhotoAndSendMail()
  -- take screen shot to baseDirectory --
  local baseDir = system.DocumentsDirectory
  display.save( localGroup, "myScreenshot.jpg", baseDir )

  -- Create mail options --
  local options =
  {
    to = { "devblogdk@gmail.com",},
    subject = "My Level",
    body = "Add this...",
    attachment =
    {
      { baseDir=system.DocumentsDirectory, filename="myScreenshot.jpg", 

        type="image" },
    },
  }

  -- Send mail --
  native.showPopup("mail", options)
end
rect:addEventListener("tap",takePhotoAndSendMail)