Onkey event in Roku for back button funtionality

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1

I am working with Scenegraph Developer Extension (SGDEX) for developing one login flow.
Now when I press Ok button in textBox the keyboard is appearing ,

But what I want is when I press backButton (once) the keyboard should disapper and if I press backButton again my screen should navigate to previous screen,

function onKeyEvent(key as string, press as boolean) as boolean
handled = false
if press then
if(key = “back”)
if (m.keyboard.visible)
m.keyboard.visible = false
end if
handled = true
end if

end if
return handled
end function

Now the problem is if I define onKey back event in my component then my SGDEX default screen stack navigation will not work, if I don’t give onkey in my component, then on pressing back button keyboard will not close,

Note:- I want keyboard to get closed using back button only.

2

@TechTalk01 -

You’ve posted to a forum for Roku users, where few, if any, will be able to help. The Developers forums are here: https://community.roku.com/t5/Developers/ct-p/channel-developers

3 
function onKeyEvent(key as string, press as boolean) as boolean
  handled = false
  if press then 
    if(key = "back")
      if (m.keyboard.visible)
        m.keyboard.visible = false
         ' only return true when you want to swallow the keypress
         ' we want to swallow the keypress only when keyboard is visible and back is pressed
        handled = true
      end if
    end if
  end if
  return handled
end function

... or even shorter version ...

function onKeyEvent(key as string, press as boolean) as boolean
  handled = false
  if press and (key = "back") and (m.keyboard.visible)
    m.keyboard.visible = false
    ' only return true when you want to swallow the keypress
    ' we want to swallow the keypress only when keyboard is visible and back is pressed
    handled = true
  end if
  return handled
end function

You almost had it. You just forgot to only swallow the keypress at the right time part. You don’t want to return true every time the back button is pressed which is what your code block did. You only want to swallow the keypress (aka return true) when you have a visible keyboard.

When the OnKeyEvent returns false it allows the keypress to pass upwards to the other components in the extend/scene.