Thanks for your replay.

 I have one more doubt.

Even though we are in any activity if we get any notification that is
displayed in status bar.

That means home screen activity is being updated by some mechanism
that may be from broadcast receiver or any service.

But that updating is not disturbing any another activity ,which is
currently running.

Does it mean that any activity other than home screen are not fully
window occupied activities.Because status bar is belong to

home screen ,it can be seen by user from any activity.That is nothing
new activities are partially occupying the window.

And one more doubt is can we update any activity's widgets status even
though that activity is not running.








On Nov 18, 7:42 pm, Mark Murphy <[email protected]> wrote:
> pink 444 wrote:
> >        Notifications are displayed in status bar.
>
> Yes.
>
> > Any thing , which
> > appears to user in android is an activity.
>
> Not everything that the user sees is an activity. The status bar and its
> contents are not an activity. Toasts are not activities. App widgets are
> not themselves an activity, but rather are displayed by other activities
> (e.g., home screen).
>
> >        Thus can i assume status bar as an activity . Because user can
> > see it.
>
> No.
>
> --
> Mark Murphy (a Commons 
> Guy)http://commonsware.com|http://twitter.com/commonsguy
>
> _The Busy Coder's Guide to *Advanced* Android Development_
> Version 1.2 Available!

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