[android-developers] Re: How to hack the activity stack of your application ?

There is some difficulties with you proposal.
-Service and UI are running on different process.
-I will have to keep track of activities ( they will have to put
themselves in some data structure) .
- They are killed ( SIGKILL) , they won't have time to save anything
neither to excute onDestroy. The problem will happen when process are
launched again ( so no memory abou what happened before, just the
stack of activity because framework does the job)

On Dec 28, 2:56 pm, theSmith <chris.smith...@gmail.com> wrote:
> If you want to, you can override the onDestroy() method of the service
> and have it call finish() on each of you activities in the stack.
> This should result in the behavior you are looking for I believe,
> because the system would be forced to create a new instance of your
> application, thus starting a new service with it.
>
> -theSmith
>
> On Dec 28, 10:35 am, André Oriani <aori...@gmail.com> wrote:
>
> > Hi all,
>
> > Differently from most application, the state of my application is not
> > controlled by its stack of activities but by the state of a background
> > service.
>
> > Here is my problem. Suppose I have a task running  with  a non empty
> > stack of activities. The top activity is paused on background and not
> > visible.  Then for some reason the  process that host both the service
> > and top activity is killed.  When I somehow return to my app
> > application ( by pressing back key, resumimg from recent apps menu),
> > the framework launches  the application again with the activity that
> > was on the top of the activity stack  before process got killed.
>
> > Okay, you would say that it is the expected behavior. But because my
> > service is no longer alive , the top activity is no longer valid ( as
> > the other activities which remain  on stack) . I would like to clear
> > the whole activity stack  and launch another activity to explain the
> > current situation to user.
>
> > I could put the follow code on every activity "if(not valid state)
> > finish() and launch a new activity with clear top flag  enabled " but
> > I don't think it is clever.  Is there a better way to control which
> > activity will be launched after application is killed ?
>
> > Tks,
> > André
>
>

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