A Service is a lot like an Activity w/o a UI, but the lifecycle is different: you have to override a rather different set of callbacks, for example. Especially for a bound service.The rules for keeping the hosting process alive are different, too. Services do not go on the Activity Stack either.
On Sunday, March 3, 2013 7:54:52 AM UTC-8, Kristopher Micinski wrote: > > Well, since a Service is just an Activity without a UI, you still get > the same behavior... > > You shouldn't be running blocking operations in a service either (even > if they're scheduled a bit more nicely), it just coordinates things. > > Kris > > On Sun, Mar 3, 2013 at 3:47 AM, Piren <gpi...@gmail.com <javascript:>> > wrote: > > i think everyone just forgot to mention the obvious and what you seemed > to > > get wrong: > > At no point what so ever were your activity and the other acitvity > running > > at the same time. > > > > Only one activity can be running (as in "Resumed" state) at a time. > Android > > has one UI thread, if you're using it, someone else is waiting. > > > > In your instance what happens is that your activity is launching, > pausing > > the other app and then giving control back once it is done. It doesn't > > matter that it has no UI. I've used such activities myself and they have > the > > nasty habit of making the phone appear unresponsive - even without a UI, > it > > is still the "top" app, thus whatever app is behind it, while appearing > to > > run, will not recieve any input commands and most likely have the UI > itself > > hault. Since its only for a brief state, no one is the wiser. > > > > Either way, you should take TreKing's suggestion, you should not be > using a > > activity for this, rather a Service (which btw, is an activity without a > UI) > > with a background thread. > > > > > > On Sunday, March 3, 2013 2:00:25 AM UTC+2, ga...@deanblakely.com wrote: > >> > >> TreKing. You gressed it. Broadcast receiver. It's an activity that > runs > >> for about 600 - 700 mills. > >> On Saturday, March 2, 2013 11:05:23 AM UTC-7, TreKing wrote: > >>> > >>> > >>> On Sat, Mar 2, 2013 at 10:36 AM, ga...@deanblakely.com > >>> <ga...@deanblakely.com> wrote: > >>>> > >>>> Well, the app reliably works while other activities are running and > when > >>>> the phone is locked. > >>> > >>> > >>> This may be the case in your testing, but this is not guaranteed. Your > >>> app can and will be killed at any point while it's in the background > to make > >>> room for other components as the system requires. You will find this > out > >>> quite quickly once you release the app users who manage to get into > these > >>> type of edge-cases. > >>> > >>> It sounds like you should be using a Service. > >>> > >>>> > >>>> You send the phone a text and you get back the phones location. It > >>>> doesn't have to be running. In fact it never has to run. It just > has to be > >>>> installed on the phone. > >>> > >>> > >>> Obviously it does have to run at some point to do anything. Maybe it > runs > >>> in response to a Broadcast instead of user interaction but it doesn't > just > >>> magically work without actually running some code. > >>> > >>> > >>> > ------------------------------------------------------------------------------------------------- > > > >>> TreKing - Chicago transit tracking app for Android-powered devices > > > > -- > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to > > android-d...@googlegroups.com<javascript:> > > To unsubscribe from this group, send email to > > android-developers+unsubscr...@googlegroups.com <javascript:> > > 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 unsubscribe from this group and stop receiving emails from it, send > an > > email to android-developers+unsubscr...@googlegroups.com <javascript:>. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- -- 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 --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
