Contains the backup and restore functionality available to applications. If a user wipes the data on their device or upgrades to a new Android-powered device, all applications that have enabled backup will restore the user's previous data.

For a detailed guide to using the backup APIs, see the Data Backup developer guide.

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All backup and restore operations are controlled by the {@link android.app.backup.BackupManager}. Each application that would like to enable backup and preserve its data on remote strage must implement a backup agent. A backup agent can be built by extending either {@link android.app.backup.BackupAgent} or {@link android.app.backup.BackupAgentHelper}. The {@link android.app.backup.BackupAgentHelper} class provides a wrapper around {@link android.app.backup.BackupAgent} that simplifies the procedures to implement a backup agent by employing backup helpers such as {@link android.app.backup.SharedPreferencesBackupHelper} and {@link android.app.backup.FileBackupHelper}.

The backup APIs let applications:

- Perform backup of arbitrary data to remote storage
- Easily perform backup of {@link android.content.SharedPreferences} and files
- Restore the data saved to remote storage