_progressHandler = new Handler() {
        public void handleMessage(Message msg) {
        	super.handleMessage(msg);
        	if (_progress >= 100) {
        		_progressDialog.dismiss();
        	} else {
        		_progress++;
        		_progressDialog.incrementProgressBy(1);
        		_progressHandler.sendEmptyMessageDelayed(0, 100);
       		}
       	}
    };
}
    
    @Override
    protected Dialog onCreateDialog(int id) {
    	switch (id) {
    	case 0:
    		return new AlertDialog.Builder(this)
    		.setIcon(R.drawable.ic_launcher)
    		.setTitle("This is a dialog with some simple text...")
    		.setPositiveButton("OK", new
    				DialogInterface.OnClickListener() {
    				public void onClick(DialogInterface dialog,
    				int whichButton)
    				{
    					Toast.makeText(getBaseContext(),
    							"OK Clicked!", Toast.LENGTH_SHORT).show();
    				}
    		})
    		.setNegativeButton("Cancel", new
    				DialogInterface.OnClickListener() {
    				public void onClick(DialogInterface dialog,
    					int whichButton)
    				{
    					Toast.makeText(getBaseContext(),
    							"Cancel Clicked!", Toast.LENGTH_SHORT).show();
    				}
    		})
    		.setMultiChoiceItems(items, itemsChecked, new
    				DialogInterface.OnMultiChoiceClickListener() {
    					@Override
    					public void onClick(DialogInterface dialog, int which,
    					boolean isChecked) {
    						Toast.makeText(getBaseContext(),
    							items[which] + (isChecked ? "Checked!":
    							"Unchecked!"),
    							Toast.LENGTH_SHORT).show();
    					}
    			}
    		)
    		.create();
    	case 1:
    		_progressDialog =new ProgressDialog(this);
    		_progressDialog.setIcon(R.drawable.ic_launcher);
    		_progressDialog.setTitle("Downloading files...");
    		_progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
    		_progressDialog.setButton(DialogInterface.BUTTON_POSITIVE, "Hide", new
    			DialogInterface.OnClickListener() {
    			public void onClick(DialogInterface dialog,
    				int whichButton)
    			{
    				Toast.makeText(getBaseContext(),
    						"Hide clicked!", Toast.LENGTH_SHORT).show();
    			}
    		});
    		return _progressDialog;
    	}
    	return null;
    }
}