Yes, it helps me a lot! I was really confused about that. Thanks, Greg! ;)
On Sat, Apr 4, 2009 at 4:37 AM, Greg Krimer <gkri...@gmail.com> wrote: > > Hi Taísa, > > I am reversing the order of your questions. > > > Did you say the main thread has its own handler?! So, if mine no more > > exists, the it will handle that message? > > As Dianne said, your handler is not associated with the activity. The > behavior of your handler is not influenced by the state of the > activity in which it was created. The handler does not know or care > that the activity is finished. Instead, the handler is associated with > the messages that are destined for it. When you create a message and > send it to some handler, a reference to the handler is placed into the > target field of the message. So long as there are messages in the > queue with your handler as the target, your handler will be called to > service them. When there are no more messages in the queue whose > target is your handler then, assuming there are no references to your > handler anywhere else, your handler will be garbage collected like all > normal objects. There is no magical link between your handler and the > activity. > > > So, it's not "ugly" to finish my Activity and let that message in the > > MessageQueue of the main thread? :) > > It is not ugly, but it may or may not be what you want. It depends on > the action that the message triggers. I had just this same situation. > In my case, the message after the "killer" message would have > triggered an action that is not valid once the activity is finished. > Since there is no magic link between the handler and the activity I > had to make one: I implemented handleMessage() in such a way that it > dropped messages if the activity was finished. > > In your case, if the message after the "killer" message is handled > harmlessly when the activity is finished then you don't need to do > anything special about it. Just leave it in the queue and it let your > handler take care of it. > > Hope this helps. > > Greg > > On Apr 3, 11:31 am, Taísa Cristina <taisa.san...@gmail.com> wrote: > > > > On Fri, Apr 3, 2009 at 3:21 PM, Dianne Hackborn <hack...@android.com> > wrote: > > > Provided your process doesn't get killed, your process's main thread > will > > > handle that message whenever it comes up, regardless of what happened > to the > > > activity. Handler doesn't know anything about the activity state. > > > > > > > > > > > > > > > On Fri, Apr 3, 2009 at 11:17 AM, Taísa Cristina < > taisa.san...@gmail.com>wrote: > > > > >> Hi all, > > > > >> I have a Handler implementation that is used in my Activity. > > > > >> While handling the messages, there's a value of "msg.what" which makes > my > > >> Activity to finish itself. > > > > >> My problem is that, when that "killer" message arrives, there's > another > > >> one in the message queue also destined to my handler. > > > > >> In this case, what happens if I just finish my Activity? > > > > >> I could see that no exception raised. But, who will handle this lost > > >> message since its Handler no longer exists? > > > > >> ** I have another Activity receiving messages containing the same data > as > > >> the killer one. So, [ I think ] I can't use "removeMessage(what, > obj)". > > > > >> Taísa > > > > > -- > > > Dianne Hackborn > > > Android framework engineer > > > hack...@android.com > > > > > Note: please don't send private questions to me, as I don't have time > to > > > provide private support, and so won't reply to such e-mails. All such > > > questions should be posted on public forums, where I and others can see > and > > > answer them. > > > > -- > > Taísa Cristina Costa dos Santos > > Computer Engineer > > Brazil, SP > > 55 19 8152-7453 > > > -- Taísa Cristina Costa dos Santos Computer Engineer Brazil, SP 55 19 8152-7453 --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
