bmgr is a shell tool you can use to interact with the Backup Manager on Android
  devices version 2.2 (API Level 8) or higher. The tool provides commands to initiate backup and
  restore operations so that you don't need to repeatedly wipe data or take similar intrusive steps
  in order to test your application's backup functionality. The bmgr tool supports both
  Auto Backup and
  Key/Value Backup.
 Note: bmgr restore does not work for
    encrypted backups.
You run bmgr commands on a device via
  adb shell and then monitor the output of the commands
  with logcat. For a list and description of
  available commands, run the bmgr tool with no arguments. For information on
  triggering backup and restore operations, see
  Testing Backup and Restore.
For information about adding support for backup in your application, read Data Backup
