Agreed, Bob. I will pursue your above route :) Dimitris- Thanks for the input. I have read the Activity lifecycle docs and believe I have a pretty solid understanding of the Activity lifecycle, this issue is however more related to the Service lifecycle.
On Apr 17, 2:53 pm, Bob Kerns <r...@acm.org> wrote: > If this were a matter of saving the data, then onPause() is indeed the > place to do the work. However, it's not appropriate here. > > This is not something you want to pause. You increase the chances of > connection failure, and you consume resources on the server. Don't do > that. > > You also don't want to stop it there, and restart it on resume. That > just causes extra work, and minimizes your chance of success. > > onDestroy() is the right place to actually destroy the background > activity here, if you want it to continue while the activity continues > to be "active". Yes, in some circumstances onDestroy() won't be > called, and the process will just be deleted. That will also nuke the > service, though, so that doesn't present a problem. > > On Apr 17, 11:02 am, Dimitris <dnkou...@gmail.com> wrote: > > > > > > > I would take into consideration that onDestroy() might not get called > > always. Usually onPause() is the best place to store/cache data before > > you are done because it is guaranteed to get called. Keep in mind not > > to do "expensive" or time consuming operations onPause() because the > > other activity that is trying to show won't show until your onPause() > > is done. > > > I recommend reading the Android activity life cycle docs on the > > android dev docs. > > > Enjoy :) > > > On Apr 17, 3:45 am, patbenatar <patbena...@gmail.com> wrote: > > > > Awesome. Thanks Bob! This has been very informative. I will pursue > > > this route :) > > > > On Apr 16, 11:47 pm, Bob Kerns <r...@acm.org> wrote: > > > > > You are 100% on the right track; this calls for a service. > > > > > As for what happens when your activity is no longer running -- well, > > > > let's consider that. > > > > > First, if your activity is simply no longer the current activity -- > > > > the user may have pressed Home, for example -- he may switch back to > > > > it. You'd like to have actually made some progress in the meantime -- > > > > especially if he left because he was tired of waiting for the > > > > transfer. You probably want to let the transfer continue until > > > > onDestroy() is called on your Activity, at which point you can stop > > > > the service. > > > > > If your activity is truly gone -- well, would that information be > > > > useful if he started up your program again later? If so, you might > > > > want to consider allowing the transfer to finish, and caching the > > > > result. In this model, the activity's onDestroy() method leaves the > > > > service alone, and the service calls stopSelf() when it's done. Next > > > > time it's started for this purpose, it can check for the cached data > > > > and immediately supply that. > > > > > If caching is inappropriate, and you want it to only run when the > > > > Activity is still alive, then use bindServce() instead of > > > > startService(), and unbind the service in the Activity's onDestroy(). > > > > The Service can track how many bindings are active, and exit early out > > > > of its loop reading the data. You couldn't do any better than this at > > > > stopping the activity even if you were doing it in the Activity > > > > anyway. > > > > > On Apr 16, 9:57 pm, patbenatar <patbena...@gmail.com> wrote: > > > > > > Hey all- > > > > > > I've run into an interesting little issue.. My loader Activity fetches > > > > > data from a web API, starting an http request and waiting for the > > > > > result.. Now what if the user flips their phone mid-http request? The > > > > > Activity is destroyed and restarted, thus the http request restarts as > > > > > well. The fact that my Activity is being destroyed on orientation > > > > > change is all good by me, I understand the way Android works, I'm just > > > > > looking for a solution to avoid restarting the http request on every > > > > > orientation change.. > > > > > > I'm thinking the solution would be Services... I could run a Service > > > > > in the background to do the http request and when it finishes, call > > > > > back to my Activity and let it handle the data and finish up. The one > > > > > thing I'm a bit weirded out about is what if the user closes my app > > > > > before the Service's http request finishes? What will it do with the > > > > > data if the Activity that needs it is no longer running? > > > > > > Thoughts, feedback, ideas, etc would be great! > > > > > > Thanks, > > > > > Nick > > > > > > -- > > > > > You received this message because you are subscribed to the Google > > > > > Groups "Android Developers" group. > > > > > To post to this group, send email to > > > > > android-developers@googlegroups.com > > > > > To unsubscribe from this group, send email to > > > > > android-developers+unsubscr...@googlegroups.com > > > > > For more options, visit this group > > > > > athttp://groups.google.com/group/android-developers?hl=en > > > > > -- > > > > You received this message because you are subscribed to the Google > > > > Groups "Android Developers" group. > > > > To post to this group, send email to android-developers@googlegroups.com > > > > To unsubscribe from this group, send email to > > > > android-developers+unsubscr...@googlegroups.com > > > > For more options, visit this group > > > > athttp://groups.google.com/group/android-developers?hl=en > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Android Developers" group. > > > To post to this group, send email to android-developers@googlegroups.com > > > To unsubscribe from this group, send email to > > > android-developers+unsubscr...@googlegroups.com > > > For more options, visit this group > > > athttp://groups.google.com/group/android-developers?hl=en > > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to android-developers@googlegroups.com > > To unsubscribe from this group, send email to > > android-developers+unsubscr...@googlegroups.com > > For more options, visit this group > > athttp://groups.google.com/group/android-developers?hl=en > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to android-developers@googlegroups.com > To unsubscribe from this group, send email to > android-developers+unsubscr...@googlegroups.com > For more options, visit this group > athttp://groups.google.com/group/android-developers?hl=en -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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