public void setListShown(boolean shown) {
        setListShown(shown, true);
    }
Control whether the list is being displayed.  You can make it not
displayed if you are waiting for the initial data to show in it.  During
this time an indeterminant progress indicator will be shown instead.
<p/>
<p>Applications do not normally need to use this themselves.  The default
behavior of ProgressListFragment is to start with the list not being shown, only
showing it once an adapter is given with {@link #setListAdapter(ListAdapter)}.
If the list at that point had not been shown, when it does get shown
it will be do without the user ever seeing the hidden state.

@param shown If true, the list view is shown; if false, the progress
             indicator.  The initial value is true.
progressfragment-native/src/com/devspark/progressfragment/ProgressListFragment.java