Android: Reproduce default loading circle in ListFragment

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http://stackoverflow.com – I noticed that ListFragments show the default animated loading circle (indeterminate progressbar) before its adapter is populated with data from a source. How can I reproduce this behavior on demand? For example: when my adapter is cleared (after it got filled) I want to show this animated circle once more until the adapter is filled again. I tried looking through the documentation but for some reason I can't seem to find how to do it... Note: I am using SherlockListFragment (HowTos)