@Swapnil, when you say that you cant call Alert Dialog from non ui thread , you can do that using a Handler as i said.Did u try that out ? It works in my case where i do an an AsyncTask (seperate thread)in which i communicate with the server and based on response i decide which screen to show. For this i call the sendEmptyMessage which is handled by the Handler which is written on the UI thread. Thanks, Alok.
On Thu, Dec 31, 2009 at 1:45 PM, Miguel Morales <[email protected]>wrote: > Sorry, just re-read your original text, it seems that message passing > between threads is the way to go. > Just use two way message passing. > > On Thu, Dec 31, 2009 at 12:09 AM, Miguel Morales > <[email protected]> wrote: > > Why not use Thread.wait() and Thread.notify() to communicate with the > > working thread. > > Or perhaps message passing to tell the worker thread to wait until > > further notice. > > > > here's how I would do it, though I'm not sure about wait() and > > notify() since I never use them myself. But I *think* it would go > > something like this: > > > > /*worker thread class*/ > > class MyThread extends Thread > > { > > Handler mHandler; > > public static final int DONE_MSG = 123; > > MyThread(Handler pHandler) > > { > > mHandler = pHandler; > > } > > @Override run() > > { > > //do something..... > > Bundle bundle = new Bundle(); > > bundle.putInt("TYPE", DONE_MSG); > > Message msg = new Message(); > > msg.setData(bundle); > > mHandler.sendMessage(msg); > > } > > > > /*activity class*/ > > private Handler message_handler = new Handler() > > { > > Bundle bundle = msg.getData(); > > int type = bundle.getInt("TYPE"); > > if ( type == MyThread.DONE_MSG ) > > { > > //dismiss the dialog... > > tThread.notify(); > > } > > } > > > > tThread = new MyThread(message_handler); > > tThread.start(); > > > > //then from your onClick handler.... > > //show the dialog.... > > tThread.wait(); > > > > On Wed, Dec 30, 2009 at 11:49 PM, swapnil kamble <[email protected]> > wrote: > >> Let me reframe my question. My intention is not to block UI thread but > to > >> block a thread when AlertDialog is shown till the user provides > confirmation > >> response. > >> > >> I have handshake process, where I have to provide an option to user > whether > >> to accept/reject and based on that user response I want to return a > boolean > >> value. And unless this response is not provided next line should not get > >> executed, just exactly what Windows MessageBox does. > >> > >> Now there are two option to start this handshake process, one either > from UI > >> thread i.e. starting from some onclick event listener. But I can't use > this > >> way, because I want to block thread until response is not provided(modal > >> dialog). Blocking this thread means blocking whole app. So this way i > can't > >> do this. > >> > >> Second option is to spawn a new worker thread and then run handshaking > from > >> it, we don't mind blocking non-ui thread. But again problem here is that > I > >> can't show AlertDialog from non UI thread. > >> > >> I know there is an option to post message and display AlertDialog from > that > >> Handler, but then in that case my thread continues and completes its > >> execution even if user response is not provided which I don't want. > >> > >> On Wed, Dec 30, 2009 at 1:16 PM, Romain Guy <[email protected]> > wrote: > >>> > >>> If you block the UI thread, the dialog won't work. The user won't be > >>> able to click it, and it might not even draw at all. So a very bad > >>> idea :) > >>> > >>> On Tue, Dec 29, 2009 at 10:33 PM, Frank Weiss <[email protected]> > wrote: > >>> > Just like Treking, I'm puzzled by Swapnil's desire to block the UI > >>> > thread. > >>> > Perhaps if he explained what he does not want the UI thread doing > while > >>> > the > >>> > dialog is displayed, would shed light on the issue for all. > >>> > > >>> > On Dec 29, 2009 9:59 PM, "TreKing" <[email protected]> wrote: > >>> > > >>> >> I can put my code in listeners but still I dont want that thread to > >>> >> continue its execution > >>> > > >>> > Which thread? The UI thread? I'm pretty sure you DO want the UI > thread > >>> > to > >>> > continue it's execution. Why would you NOT? > >>> > What are you trying to accomplish? I can't think of why you would > want > >>> > this > >>> > behavior... > >>> > > >>> > > >>> > > ------------------------------------------------------------------------------------------------- > >>> > ... > >>> > > >>> > On Wed, Dec 30, 2009 at 12:27 AM, swapnil kamble < > [email protected]> > >>> > wrote: > > Thanks for your ... > >>> > > >>> > -- > >>> > > >>> > You received this message because you are subscribed to the Google > >>> > Groups > >>> > "Android Developers" group... > >>> > > >>> > -- > >>> > You received this message because you are subscribed to the Google > >>> > Groups "Android Developers" group. > >>> > To post to this group, send email to > [email protected] > >>> > To unsubscribe from this group, send email to > >>> > [email protected]<android-developers%[email protected]> > >>> > For more options, visit this group at > >>> > http://groups.google.com/group/android-developers?hl=en > >>> > >>> > >>> > >>> -- > >>> Romain Guy > >>> Android framework engineer > >>> [email protected] > >>> > >>> Note: please don't send private questions to me, as I don't have time > >>> to provide private support. All such questions should be posted on > >>> public forums, where I and others can see and answer them > >>> > >>> -- > >>> You received this message because you are subscribed to the Google > >>> Groups "Android Developers" group. > >>> To post to this group, send email to > [email protected] > >>> To unsubscribe from this group, send email to > >>> [email protected]<android-developers%[email protected]> > >>> For more options, visit this group at > >>> http://groups.google.com/group/android-developers?hl=en > >> > >> > >> -- > >> ...Swapnil > >> > >> || Hare Krishna Hare Krishna Krishna Krishna Hare Hare || > >> || Hare Rama Hare Rama Rama Rama Hare Hare || > >> > >> -- > >> You received this message because you are subscribed to the Google > >> Groups "Android Developers" group. > >> To post to this group, send email to > [email protected] > >> To unsubscribe from this group, send email to > >> [email protected]<android-developers%[email protected]> > >> For more options, visit this group at > >> http://groups.google.com/group/android-developers?hl=en > > > > > > > > -- > > The Revolting X Software/Music Production: > > http://diastrofunk.com > > > > > > -- > The Revolting X Software/Music Production: > http://diastrofunk.com > Blogspot: > http://developingthedream.blogspot.com/ > Youtube: > http://www.youtube.com/user/revoltingx > ~Isaiah 55:8-9 > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected]<android-developers%[email protected]> > 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. 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