Application (taken to mean the application's process) != Actvity (or
Service or Receiver or ContentProvider, substitute your own component here).
It's true that you should shut down any unneeded tasks and threads in
your activity's onDestroy (actually, more like onPause), but the process
is kept around.
Quoting from the Dev Guide (emphasis mine):
http://developer.android.com/guide/topics/fundamentals.html#procthread
*Android may decide to shut down a process at some point*, when memory
is low and required by other processes that are more immediately
serving the user. Application components running in the process are
consequently destroyed. A process is restarted for those components
when there's again work for them to do.
http://developer.android.com/guide/topics/fundamentals.html#proclife
*The Android system tries to maintain an application process for as
long as possible*, but eventually it will need to remove old processes
when memory runs low. To determine which processes to keep and which
to kill, Android places each process into an "importance hierarchy"
based on the components running in it and the state of those
components. Processes with the lowest importance are eliminated first,
then those with the next lowest, and so on.
-- Kostya
14.02.2011 23:10, Kevin Duffey пишет:
I am curious why if in your onDestroy you shut down any tasks/threads,
your app would still show up? I would think it would exit properly if
you wanted it to. Perhaps I misunderstood that. I thought if the
lifecycle onDestroy fires, that meant your app (or at least the
activity) was going to be done. If you only have one activity then
your app should essentially close. If your app is made of multiple
activities, then calling finish() does that not end the activity?
Assuming you have 3 or 4 running, and you call that on all of them,
wouldn't your app shut down?
I see I still need to learn more on the lifecycle stuff.
On Mon, Feb 14, 2011 at 11:42 AM, Kostya Vasilyev <kmans...@gmail.com
<mailto:kmans...@gmail.com>> wrote:
14.02.2011 22:28, John пишет:
A user who has downloaded my app probably won't take time to
ask me
why my app is still running. He will merely look at the task
manager
and form a bad opinion of my app.
Yes they can. However, not all users use task killers, and among
those who do, some do email and ask.
Misguided as this user may be, I have an unverified belief
that many
such users exist.
Some do, and sometimes they post bad comments that may or may not
affect other user's perception of your app. In general, users are
just human, and they can misjudge any particular feature or lack
thereof and complain.
This used to really get on my nerves, now I'm a few months older
and a few notches wiser - or just more cynical, but that's healthy
cynicism.
And speaking of that:
http://en.wikipedia.org/wiki/Cynicism
They believed [...] suffering was caused by false judgments of
what was valuable and by the worthless customs and conventions
which surrounded society
It fits perfectly - in this case, suffering is caused by the false
judgment that a task killer is valuable, and by the worthless
custom and convention of downloading and using one :)
--
Kostya Vasilyev -- http://kmansoft.wordpress.com
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