Here's an example use of onProgressUpdate() which solves your problem.

http://www.codingforandroid.com/2011/06/basic-asynctask-with-progress-bar.html

On Monday, August 20, 2012 11:34:07 PM UTC+8, Wolfgang wrote:
>
> Hey guys,
>  
> I am trying to add a ProgressDialog to show the progress of my AsyncTask. 
> However, the ProgressDialog is not being shown until after the async task 
> is complete. I have read that async task blocks the UI thread. How can I 
> get around this to show the ProgressDialog during the async task?
>  
> Thanks,
>  
> -W
>

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