title: Setting UI preference Summary field to the value of the preference
body: <p>New to Android, I have some code when the user changes a preference I update the Summary field in the UI preference to be the value they entered.  However, when the preference activity is created I'd like to set the Summary fields to be the values in the corresponding preferences.
  Please advise. Thanks.  </p>
  
  <pre><code>public class MyPreferenceActivity extends PreferenceActivity implements
          OnSharedPreferenceChangeListener {
  
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          addPreferencesFromResource(R.xml.preference);
          SharedPreferences sp = getPreferenceScreen().getSharedPreferences();
          sp.registerOnSharedPreferenceChangeListener(this);
      }
  
      public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
              String key) {
          Preference pref = findPreference(key);
          if (pref instanceof EditTextPreference) {
              EditTextPreference etp = (EditTextPreference) pref;
              pref.setSummary(etp.getText());
          }
      }
  }
  </code></pre>