android - How to use findPreference outside of PreferenceActivity? -

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i'm trying gain access (custom) list preference , change selected value (i.e. if index 3 selected, change selection index 1). however, findpreference() can used inside preferenceactivity. need access preference , change selection inside regular activity. there way can done? don't see in sharedpreferences can use change selection, list preferences value.

this how it, 

sharedpreferences prefs = preferencemanager.getdefaultsharedpreference(this); prefs.getstring(pref_key, "default");

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