ScreenShot (CORONA SDK)

Question

I have to take screenshot of desired screen group but it is not working and totally black image is saved in documents directory . How can I save the screenshot ?

local function takeSnapshot(event)
  timer.performWithDelay( 100, captureWithDelay )
end
function captureWithDelay()
  local baseDir = system.DocumentsDirectory
  display.save( stageGroup, "entireGroup.jpg", baseDir )
end

Answer 1

I think you using lower version of graphics drive.Try it in Mac latest.

Answer 2

For saving a display group, you have to:

• First create a display group.
• Then add the screen objects to that group.
• Return the display group
• Use display.save to save the entire group displayed.

I am giving a sample here:

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

-- creating display objects and adding it to the group --
local bg = display.newRect(0,0,_w,_h)
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 takePhoto()
    -- take screen shot to baseDirectory --
    local baseDir = system.DocumentsDirectory
    display.save( stageGroup, "myScreenshot.jpg", baseDir )
end
rect:addEventListener("tap",takePhoto)

Note: Make sure that you have added the objects to be appear on the screenshot to the stageGroup.

Keep Coding............. :)