SharedPreferencesBackupHelper.PerformBackup Method

Reference

Definition

Namespace:: Android.App.Backup

Assembly:: Mono.Android.dll

Important

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Backs up the configured android.content.SharedPreferences groups.

[Android.Runtime.Register("performBackup", "(Landroid/os/ParcelFileDescriptor;Landroid/app/backup/BackupDataOutput;Landroid/os/ParcelFileDescriptor;)V", "GetPerformBackup_Landroid_os_ParcelFileDescriptor_Landroid_app_backup_BackupDataOutput_Landroid_os_ParcelFileDescriptor_Handler")]
public virtual void PerformBackup (Android.OS.ParcelFileDescriptor? oldState, Android.App.Backup.BackupDataOutput? data, Android.OS.ParcelFileDescriptor? newState);

[<Android.Runtime.Register("performBackup", "(Landroid/os/ParcelFileDescriptor;Landroid/app/backup/BackupDataOutput;Landroid/os/ParcelFileDescriptor;)V", "GetPerformBackup_Landroid_os_ParcelFileDescriptor_Landroid_app_backup_BackupDataOutput_Landroid_os_ParcelFileDescriptor_Handler")>]
abstract member PerformBackup : Android.OS.ParcelFileDescriptor * Android.App.Backup.BackupDataOutput * Android.OS.ParcelFileDescriptor -> unit
override this.PerformBackup : Android.OS.ParcelFileDescriptor * Android.App.Backup.BackupDataOutput * Android.OS.ParcelFileDescriptor -> unit

Parameters

oldState: ParcelFileDescriptor

An open, read-only ParcelFileDescriptor pointing to the last backup state provided by the application. May be null, in which case no prior state is being provided and the application should perform a full backup.

data: BackupDataOutput

An open, read/write BackupDataOutput pointing to the backup data destination. Typically the application will use backup helper classes to write to this file.

newState: ParcelFileDescriptor

An open, read/write ParcelFileDescriptor pointing to an empty file. The application should record the final backup state here after writing the requested data to the data output stream.

Implements

PerformBackup(ParcelFileDescriptor, BackupDataOutput, ParcelFileDescriptor)

Attributes: RegisterAttribute

Remarks

Backs up the configured android.content.SharedPreferences groups.

Java documentation for android.app.backup.SharedPreferencesBackupHelper.performBackup(android.os.ParcelFileDescriptor, android.app.backup.BackupDataOutput, android.os.ParcelFileDescriptor).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to

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