[mono-android] How to force an exit gracefully

[Matthew Groves]

This sounds like more of a general Android question.  Here's a great Stack
Overflow discussion on exiting Android apps:

http://stackoverflow.com/questions/2033914/quitting-an-application-is-that-frowned-upon/2034238

<http://stackoverflow.com/questions/2033914/quitting-an-application-is-that-frowned-upon/2034238>
-Matt


On Wed, Mar 30, 2011 at 10:09 AM, Brian Long <brian at blong.com> wrote:

> I'm tussling with the question of how best to force my app to exit
> The flow is that after a splash screen, the main activity starts and
> when (in OnResume) it detects a lack of user login, it launches the
> login activity
> While in the login screen, the user can press the back button, which
> will go to the main activity and therefore be immediately bounced to
> the login screen again
> To avoid Back having effectively no function (in the user's eyes) I
> figured maybe Back should just exit the app
> Options seem to be:
>
> System.Environment.Exit(0);
>
> or
>
> Process.KillProcess(Process.MyPid());
>
> I've used the former thus far
>
> However the log (below) seems to imply that maybe I'm being a little
> harsh, with its doom-mongering comments about threads exiting without
> being detached and premature finalization and signal termination and
> so on.
>
> Questions:
>
> 1) Am I going about this completely the wrong way, and should I be
> taking a standard approach here that hasn't occurred to me?
> 2) Should I ignore the log messages and be happy that I can exit when
> I want to ?
> 3) Why does MonoDroid keep posting a log message saying "signature" ?
>
> Thanks for any advice on the matter
>
> - Brian
>
> INFO/monodroid(3281): Activating instance of type TimeSheet.SplashActivity
> INFO/monodroid(3281): signature
> INFO/ActivityManager(96): Displayed activity
> com.blong.TimeSheet/timesheet.SplashActivity: 2696 ms (total 2696 ms)
> INFO/ActivityManager(96): Starting activity: Intent {
> cmp=com.blong.TimeSheet/timesheet.MainActivity }
> INFO/monodroid(3281): Activating instance of type TimeSheet.MainActivity
> INFO/monodroid(3281): signature
> INFO/ActivityManager(96): Starting activity: Intent {
> cmp=com.blong.TimeSheet/timesheet.LoginActivity }
> INFO/monodroid(3281): Activating instance of type TimeSheet.LoginActivity
> INFO/monodroid(3281): signature
> INFO/ActivityManager(96): Displayed activity
> com.blong.TimeSheet/timesheet.LoginActivity: 332 ms (total 520 ms)
> DEBUG/dalvikvm(3281): threadid=7: thread exiting, not yet detached
> (count=0)
> DEBUG/dalvikvm(3281): threadid=7: thread exiting, not yet detached
> (count=1)
> ERROR/dalvikvm(3281): threadid=7: native thread exited without detaching
> ERROR/dalvikvm(3281): VM aborting
> WARN/mono(3281): Thread 0x0 may have been prematurely finalized
> WARN/ContentService(96): binderDied() at ObserverNode name system
> INFO/ActivityManager(96): Process com.blong.TimeSheet (pid 3281) has died.
> INFO/WindowManager(96): WIN DEATH: Window{46c6b6d8
> com.blong.TimeSheet/timesheet.LoginActivity paused=false}
> ERROR/ActivityManager(96): fail to set top app changed!
> DEBUG/Zygote(66): Process 3281 terminated by signal (11)
> WARN/WindowManager(96): No focus window, dropping: KeyEvent{action=1
> code=4 repeat=0 meta=0 scancode=158 mFlags=8}
> INFO/UsageStats(96): Unexpected resume of com.htc.launcher while
> already resumed in com.blong.TimeSheet
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