code: protected void setProgressMessage(final String message) {
  		runOnUiThread(new Runnable() {
  			public void run() {
  				synchronized ( lockProgress ) {
  					if( progressDialog != null ) {
  						// a dialog is already open, change the message
  						progressDialog.setMessage(message);
  						return;
  					}
  					progressDialog = new ProgressDialog(VideoDisplayActivity.this);
  					progressDialog.setMessage(message);
  					progressDialog.setIndeterminate(true);
  					progressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
  				}
  
  				// don't show the dialog until 1 second has passed
  				long showTime = System.currentTimeMillis()+1000;
  				while( showTime > System.currentTimeMillis() ) {
  					Thread.yield();
  				}
  				// if it hasn't been dismissed, show the dialog
  				synchronized ( lockProgress ) {
  					if( progressDialog != null )
  						progressDialog.show();
  				}
  			}});
  
  		// block until the GUI thread has been called
  		while( progressDialog == null  ) {
  			Thread.yield();
  		}
  	}
docs: Displays an indeterminate progress dialog.   If the dialog is already open this will change the message being
  displayed.  Function blocks until the dialog has been declared.
  
  @param message Text shown in dialog