hello, Lefko!

how can I help you today?

wow Im the only one here

quite day I guess

yes

anyway, I wanted to ask what windows are. I am not referring to 7.0 mullti window

um, can you be more specific?

more like referring to window manager and other classes that I see in stacktraces from time to time

i mean what is the function of a Window in android

we usually don't work with windows directly, but under the covers, everything gets rendered into a window

activities are rendered into a window

Dialog contents are rendered into a window

a Toast is a window

the drop-down from Spinner is a window

overflow menus are windows

and so on

and the OS is responsible for windows or the activity?

that depends on what you mean by "responsible"

the activity, or things created by the activity (e.g., widgets), draw into windows

the OS handles Z-axis compositing of windows, for overlaps

what does that drawing?

well, in the case of a widget, onDraw()

is that application level or OS level

the Canvas that is handed winds up being applied to a window

applications define what go into windows

the actual window compositing is AFAIK handled by the OS, due to the Z-axis ordering stuff

but you're getting outside my area of expertise there

so the OS creates a window and the application tells it what to render inside and preferred size and placement etc

yes, at a high level

ok thats pretty much it for me for today. thanks!

you

you're welcome!