If you are going to be doing something that takes a long time you need to use 
separate threads.  If you try to do long processes in your main UI thread 
then UI events (like open ProgressDialog) will not work.

I wrote a small tutorial which may help:
http://www.helloandroid.com/node/243

-- 

Zach Hobbs
HelloAndroid.com
Android OS news, tutorials, downloads 


On Monday 30 June 2008 11:55:31 6real wrote:
> Dear all,
>
> Here is the behavior I expect from my app :
> I have a customized YES/NO dialog box.
>
> if the customer says YES, then I'd like to show a progress dialog
> (even a custom one, juste to incidate that a long process is running).
>
> I really have issues with the progress dialog (does not appear and )
> so I decided to use a custom view.
>
> 1 - try : The progressdialog class.
> An error here, a. the window does not pop-up and when I try to
> dismiss, I have an error message (telling the dialog is not linked to
> a window or something like that)
>
> 2 - try  :show a custom pop-up with a progressbar inside
> The alert dialog never pops-up.
>
> 3 - try : change the (content)view of the yes/no dialog
> The yes/no dialog change at the end of the onclick method.
>
> Here is the snippet, because this si my last try :
> ---------------------------
>  View viewUpdateValidation = (View)
> vi.inflate(R.layout.dialog_validate_station_update, null, null);
>
>                 final AlertDialog dialogValidateUpdate = new
> AlertDialog.Builder(Veloid.this).setTitle(R.string.menu_about)
>                                                                            
>         .setView(viewUpdateValidation) .show();
>
>                 ImageButton btnOKupdate = (ImageButton)
> dialogValidateUpdate.findViewById(R.id.input_update_station_lst_btn_valid);
>                 btnOKupdate.setOnClickListener(new OnClickListener() {
>                     public void onClick(View clicked) {
>
>                         dialogValidateUpdate.setView((View)
> vi.inflate(R.layout.dialog_progress_update_stations, null, null));
>
>
>                         //update
>                         mgr.updateStationListDynamicaly();
>
>                         //dialogValidateUpdate.dismiss();
>
>                     }
> // AFTER THE CALL THE setViewMethod DOES A CHANGE.
>                 });
> ---------------------------
>
> Can you please give me ideas on how to do what I would like : show a
> pop-up with a progress bar when YES is clicked (I don't mind to
> dismiss the main YES/NO dialog.)
>
>
> 


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