code: @SuppressWarnings("deprecation")
      private void setupSimplePreferencesScreen() {
          if (!SettingsActivity.isSimplePreferences(this)) {
              return;
          }
  
          // Class<ContactPreferenceFragment> a = ContactPreferenceFragment.class;
  
          // In the simplified UI, fragments are not used at all and we instead
          // use the older PreferenceActivity APIs.
  
          // Add 'general' preferences.
          PreferenceCategory fakeHeader = new PreferenceCategory(this);
          addPreferencesFromResource(R.xml.pref_contact);
  
          SettingsActivity.bindPreferenceSummaryToValue(findPreference(SettingsActivity.PREF_KEY_FULL_NAME));
          SettingsActivity.bindPreferenceSummaryToValue(findPreference(SettingsActivity.PREF_KEY_ADDRESS));
          SettingsActivity.bindPreferenceSummaryToValue(findPreference(SettingsActivity.PREF_KEY_PHONE_NUMBER));
          SettingsActivity.bindPreferenceSummaryToValue(findPreference(SettingsActivity.PREF_KEY_EMAIL));
      }
docs: Shows the simplified settings UI if the device configuration if the device configuration dictates that a
  simplified, single-pane UI should be shown.