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copied!<p>This is a classic job for an <code>AsyncTask</code>. from the <a href="http://developer.android.com/reference/android/os/AsyncTask.html" rel="nofollow">documentation</a>:</p> <blockquote> <p>AsyncTask enables proper and easy use of the UI thread. This class allows to perform background operations and publish results on the UI thread without having to manipulate threads and/or handlers.</p> </blockquote> <p>You won't need another activity or service for this.</p> <p>The <code>Asynctask</code> documentation has some sample code but in short, you would inherit from <code>AsyncTask</code> and override the <code>doInBackground</code> method to do the background stuff (guaranteed to run in a background thread). you might also want to call <code>publishProgress</code> from within this method to indicate you have progressed with your background operation. Then you'll return the computation result from this method (an XML buffer in your case).</p> <p>You might want to override the <code>OnProgressUpdate</code> and update a <code>ProgressBar</code> accordingly. This method will run in the UI thread in response to your <code>publishProgress</code> background method calls.</p> <p>Also you'd want to override the <code>onPostExecuteMethod</code> that is guaranteed to run after the background operation was finished on the main thread. You get the result of <code>doInBackground</code> as a parameter to this method.</p> <p>Note that this API is available for level 3 (android 1.5) and above.</p>

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