Android Positioning Progress Dialog or Custom Progress Dialog

I don't know how to position the progress dialog(the one with the rotating image). When my application starts its display an fu开发者_StackOverflow社区ll screen image and a progress dialog box. I need to moved the progress dialog box a little lower.

Thanks Rajesh

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I've tried this one and works:

ProgressDialog dialog = new ProgressDialog(this);
dialog.getWindow().setGravity(Gravity.BOTTOM);

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I do a similar thing and I found that it was just easier to build a class that extends Dialog that shows the image and the Progress spinner.