private void loadRecents() {
   SharedPreferences prefs = getPreferences();
   String str = prefs.getString(PREF_RECENTS, "");
   StringTokenizer tokenizer = new StringTokenizer(str, "~");
   while (tokenizer.hasMoreTokens()) {
     try {
       add(Sticker.parse(tokenizer.nextToken()));
     } catch (NumberFormatException e) {
       // ignored
     }
   }
 }