Since process != application.. just what are the distinctions? On Fri, Apr 9, 2010 at 5:06 PM, Bob Kerns <r...@acm.org> wrote:
> Just to point out a couple more things here. > > 1) a Service's lifetime is NOT, in general, the same as an > Application's lifetime. A service can be deleted when it's not in > active use by any activity or intent. This can save memory. > > 2) Under some circumstances, more than one application may be running > in the same process. You won't be encountering those situations by > accident, but it's an important part of the model nonetheless. In > Android, process != application. > > 3) By using a service, you get control over when and how your service > gets restarted if your application and process get deleted in a low- > memory situation. Services will be automatically restarted. > Applications, and any singletons they manage, will not, unless they're > required by a service being restarted! In a sense, your service > continues to "exist" even when there's no process available to run it > in.Once a process is available, your service is recreated and resumed. > (This applies to services started with startService rather than > binding. But if you want this, you can do both operations on the same > service). > > On Apr 9, 10:49 am, Mark Murphy <mmur...@commonsware.com> wrote: > > ailinykh wrote: > > > What do mean by "when all components of an Android application are > > > destroyed"? > > > Let's talk about Activity, for example. Does "destroy Activity" means > > > unload Java class? > > > > No, I mean destroyed, as in onDestroy(). > > > > > If so, what happens when system tries to destroy activity but it is > > > referenced by another object ( for instance, a singleton may keep > > > reference to it) ? > > > > The component is destroyed from an Android standpoint, but the Activity > > will not be garbage collected. This results in a memory leak and is why > > mutable static data members should be avoided where possible. > > > > -- > > Mark Murphy (a Commons Guy)http://commonsware.com| > http://twitter.com/commonsguy > > > > Android App Developer Books:http://commonsware.com/books > > -- > 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<android-developers%2bunsubscr...@googlegroups.com> > For more options, visit this group at > http://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 at http://groups.google.com/group/android-developers?hl=en To unsubscribe, reply using "remove me" as the subject.
