cannot say without looking at code.. But have you used Handler to pass the messages..
I think u may be missing handler.. Regards, Mahavir On Tue, Mar 15, 2011 at 9:03 AM, David Williams < [email protected]> wrote: > Well, > > I've had some success with this, but I must be doing something wrong as I > am not getting the result I am expecting. > > My doInBackground returns a Boolean, and according to debug at the return > command, my Boolean variable is showing as false, which is what I would > expect based upon my logic. > Am I right in thinking that the return from doInBackground gets passed to > onPostExecute? If so then I'd expect my input parameter (which is Boolean) > to be false too, but it's not, it's showing as true. > > I'm just not getting that. A bit more information: > > private class initialiseServer extends AsyncTask<Void, Integer, Boolean> > protected Boolean doInBackground(Void...voids) [Inside this code I have a > Boolean variable that is initialized to false and this variable is > returned.] > protected void onPostExecute(Boolean result) > > Would appreciate any help on this. > ------------------------------ > > David Williams > Check out our WebOS mobile phone app for the Palm Pre and Pixi: > <http://www.dtw-consulting.com/GolfCaddie> Golf > Caddie<http://www.dtw-consulting.com/GolfCaddie>| Golf > Caddie Forum <http://www.dtw-consulting.com/GolfCaddie/forum> | Golf > Caddie FAQ <http://www.dtw-consulting.com/GolfCaddie/faq.html> by > DTW-Consulting, Inc. > > > > On 3/11/2011 4:00 PM, Kostya Vasilyev wrote: > > 12.03.2011 0:31, David Williams пишет: > > Does Java do certain things asynchronously then? I was thinking that > things were done in a serial fashion but perhaps that is not the case. > > > ProgressDialog.show is asynchronous, just like may other UI operations. > > Normally, this works, because the Android UI toolkit, just like many others > (and not just for Java) is built around the "event loop" or "message loop" > concept. The main thread runs in an infinite loop for processing messages, > one at a time. Each message is a small task: this can include, for example, > showing a dialog, redrawing a view, calling one of the application's > callback methods. > > Your code: > > - Called by Android in onCreate > - Calls setContentView > - Calls ProgressDialog.show > - Fetches stuff from the Internet > - Returns from onCreate > > All of the above happens on the UI thread, which waits for your onCreate to > return before proceeding to the next message (== "small task"). > > What your code in onCreate should do: > > - Call setContentView > - Call ProgressDialog.show > - Start an asynchronous operation to fetch stuff from the Internet > - Return from onCreate > - [ Android processes queued-up operations: draws your activity, shows the > dialog ] > > The asynchronous fetch then should: > > - Run on its own thread; > - When done, "tell" the application to hide the progress dialog and > proceed. > > Hopefully, it starts to make more sense as you read through the links I've > provided. > > This is probably the easiest way to implement asynchronous operations: > > http://developer.android.com/reference/android/os/AsyncTask.html > > -- > Kostya Vasilyev -- http://kmansoft.wordpress.com > > -- > 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] > 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 [email protected] > To unsubscribe from this group, send email to > [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. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
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