></code>.  These helpers are
specialized classes for backing up certain kinds of data.  The Android framework
currently includes two such helpers:  <code><a href="../../reference/android/app/backup/FileBackupHelper.html">FileBackupHelper</a></code> and <code><a href="../../reference/android/app/backup/SharedPreferencesBackupHelper.html">SharedPreferencesBackupHelper</a></code>.  After you create the helper
and point it at the data you want to back up, just add it to the
BackupAgentHelper using the <code><a 