harmony 鸿蒙@ohos.application.BackupExtensionAbility (Backup and Restore Extension Capability) (System API)

2025-06-12
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@ohos.application.BackupExtensionAbility (Backup and Restore Extension Capability) (System API)

The BackupExtensionAbility module provides extended backup and restore capabilities for applications.

NOTE

The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.

This page contains only the system APIs of this module. For details about other public APIs, see @ohos.application.BackupExtensionAbility (Backup and Restore Extension Capability).

The APIs of this module can be used only in the stage model.

Modules to Import

import { BackupExtensionAbility, BundleVersion } from '@kit.CoreFileKit';

getBackupInfo¹²⁺

getBackupInfo(): string

Obtains backup information. This API is called when the caller queries application data. You need to implement the operation for querying application data.

System capability: SystemCapability.FileManagement.StorageService.Backup

Example

  class BackupExt extends BackupExtensionAbility {
    getBackupInfo(): string {
      console.log(`getBackupInfo ok`);
      let info = "app diy info";
      return info;
    }
  }