private void updateTimeoutSummary(Config config) {
   mTimeoutPreference.setSummary(
       ResUtils.getString(
           getResources(),
           R.string.settings_timeout_summary,
           Float.toString(config.getTimeoutNormal() / 1000f),
           Float.toString(config.getTimeoutShort() / 1000f)));
 }
 private void updateInactiveHoursSummary(Config config) {
   if (config.isInactiveTimeEnabled()) {
     int from = config.getInactiveTimeFrom();
     int to = config.getInactiveTimeTo();
     mInactiveHoursPreference.setSummary(
         ResUtils.getString(
             getResources(),
             R.string.settings_inactive_hours_enabled,
             DateUtils.formatTime(getActivity(), from / 60, from % 60),
             DateUtils.formatTime(getActivity(), to / 60, to % 60)));
   } else {
     mInactiveHoursPreference.setSummary(getString(R.string.settings_inactive_hours_disabled));
   }
 }