OK - just not terminology I am used to seeing in embedded software.
On Feb 23, 7:54 pm, Dianne Hackborn <[email protected]> wrote:
> It doesn't really have anything to do with the binder. It's just that
> generally if you see two separate entities working together, one is
> providing some more basic functionality that another is using. So an
> application is a client of both the window manager and activity manager.
> Also the activity manager is a client of the window manager based on the
> layering of the stack -- that is, the window manager knows nothing about an
> "activity manager," but the activity manager makes calls on the window
> manager to tell it what it would like to have done. (And both of these are
> clients of the package manager, etc.)
>
>
>
> On Sun, Feb 22, 2009 at 8:36 PM, stefoid <[email protected]> wrote:
>
> > uh, 'client and server'? Are we talking about the Activity Manager
> > Service (service) and whatever is calling it (client)?
>
> > I imagine if I was to delve into information about the Binder
> > mechanism for IPC that this would make more sense.
>
> > Ill mark it as 'interesting but not relevent right now'
>
> > cheers
>
> > On Feb 23, 3:06 pm, Dianne Hackborn <[email protected]> wrote:
> > > Usually when you see a token, it is an IBinder object that has no meaning
> > to
> > > the one using it except as some unique identity. That is, the
> > interesting
> > > thing about is not whatever interface may be behind the IBinder (if there
> > is
> > > one at all), but rather its existence as a unique object that both the
> > > client and server can share and nobody else can spoof.
>
> > > On Sun, Feb 22, 2009 at 7:36 PM, stefoid <[email protected]>
> > wrote:
>
> > > > cheers, Dianne.
>
> > > > I am methodically trying to understand relevent functions. One thing
> > > > I have come across which I havent tracked down is 'token'. I see that
> > > > it is something that implements IBinder. I suppose it is some kind of
> > > > reference to an activity that is used by other parts of the system.
> > > > Who uses it and how is it used?
>
> > > > On Feb 20, 8:34 pm, Dianne Hackborn <[email protected]> wrote:
> > > > > On Thu, Feb 19, 2009 at 10:29 PM, stefoid <[email protected]>
> > > > wrote:
> > > > > > mHistory is used to record the 'visual' order of activities that
> > are
> > > > > > revealed as the user pushes 'back'.
>
> > > > > Yep.
>
> > > > > > 1) why is mHistory a single stack? You could have made each task
> > in
> > > > > > mRecentTasks point to a different stack instance - its own stack of
> > > > > > activities, and have the order of tasks in mRecentTasks define the
> > > > > > order in which the different tasks were revealed as the user pushes
> > > > > > back through the activities of one task into the activites of the
> > > > > > next. I assume there is something fundamental I am missing that is
> > > > > > the reason.
>
> > > > > This is mostly legacy. The original implementation was a simple
> > stack of
> > > > > activities, and the concept of tasks was added later on top of that.
> > If
> > > > I
> > > > > had implemented the current design all at once, I would have done it
> > has
> > > > a
> > > > > more complicated data structure, but that is not how it evolved. At
> > some
> > > > > point that should probably be reworked, but it hasn't been worth the
> > > > effort
> > > > > so far. And ultimately you do need all of the history records in a
> > > > single
> > > > > Z-order list to manage them with the window manager.
>
> > > > > 2) is the order of tasks in mRecentTasks important?
>
> > > > > mRecentTasks is really not that relevent -- it is just an LRU list of
> > the
> > > > > most recent tasks the user has activitied, whether running or not.
> > Its
> > > > only
> > > > > purpose is to show the recent tasks dialog when you long press on
> > home
> > > > (or
> > > > > for anyone else wanting to do a task management kind of thing).
>
> > > > > It is very important to be aware that this is not -running- tasks,
> > but
> > > > > recently used tasks. More like a "recent documents" list in a word
> > > > > processor than a "process list" in a process manager.
>
> > > > > --
> > > > > Dianne Hackborn
> > > > > Android framework engineer
> > > > > [email protected]
>
> > > > > Note: please don't send private questions to me, as I don't have time
> > to
> > > > > provide private support. All such questions should be posted on
> > public
> > > > > forums, where I and others can see and answer them.
>
> > > --
> > > Dianne Hackborn
> > > Android framework engineer
> > > [email protected]
>
> > > Note: please don't send private questions to me, as I don't have time to
> > > provide private support. All such questions should be posted on public
> > > forums, where I and others can see and answer them.
>
> --
> Dianne Hackborn
> Android framework engineer
> [email protected]
>
> Note: please don't send private questions to me, as I don't have time to
> provide private support. All such questions should be posted on public
> forums, where I and others can see and answer them.
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