PreferenceFragment Deprecated

Instead of using PreferenceFragment now we have to use PreferenceFragmentCompat

Implementation example inside Fragment:

public static class DemoFragment extends PreferenceFragmentCompat {

    @Override
        public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
        // Load the preferences from an XML resource
        setPreferencesFromResource(R.xml.preferences, rootKey);
    }
}

Please see official documentation of PreferenceFragmentCompat.