Removing Assets (ArkTS)

Available APIs

You can use remove(query: AssetMap), an asynchronous API, or removeSync(query: AssetMap), a synchronous API, to remove assets. If the asset alias is specified, the specified asset will be removed. If no asset alias is specified, all assets will be removed.

The following table describes the attributes of AssetMap for removing an asset.

NOTE

In the following table, the attributes starting with DATA_LABEL are custom asset attributes reserved for services. These attributes are not encrypted. Therefore, do not put personal data in these attributes.

Attribute Name (Tag)	Value	Mandatory	Description
ALIAS	Type: Uint8Array Length: 1-256 bytes	No	Asset alias, which uniquely identifies an asset.
ACCESSIBILITY	Type: number Value range: see Accessibility	No	Access control based on the lock screen status.
REQUIRE_PASSWORD_SET	Type: boolean	No	Whether the asset is accessible only when a lock screen password is set.
AUTH_TYPE	Type: number Value range: see AuthType	No	Type of user authentication required for accessing the asset.
SYNC_TYPE	Type: number Value range: see SyncType	No	Type of sync supported by the asset.
IS_PERSISTENT	Type: boolean	No	Whether to retain the asset when the application is uninstalled.
DATA_LABEL_CRITICAL_1	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service with integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_CRITICAL_2	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service with integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_CRITICAL_3	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service with integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_CRITICAL_4	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service with integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_NORMAL_1	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service without integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_NORMAL_2	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service without integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_NORMAL_3	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service without integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_NORMAL_4	Type: Uint8Array Length: 1-2048 bytes	No	Asset attribute information customized by the service without integrity protection. NOTE: The data length is 1 to 512 bytes before API version 12.
DATA_LABEL_NORMAL_LOCAL_1¹²⁺	Type: Uint8Array Length: 1-2048 bytes	No	Local attribute information about the asset. The value is assigned by the service without integrity protection and will not be synced.
DATA_LABEL_NORMAL_LOCAL_2¹²⁺	Type: Uint8Array Length: 1-2048 bytes	No	Local attribute information about the asset. The value is assigned by the service without integrity protection and will not be synced.
DATA_LABEL_NORMAL_LOCAL_3¹²⁺	Type: Uint8Array Length: 1-2048 bytes	No	Local attribute information about the asset. The value is assigned by the service without integrity protection and will not be synced.
DATA_LABEL_NORMAL_LOCAL_4¹²⁺	Type: Uint8Array Length: 1-2048 bytes	No	Local attribute information about the asset. The value is assigned by the service without integrity protection and will not be synced.
REQUIRE_ATTR_ENCRYPTED¹⁴⁺	Type: boolean	No	Whether to remove the customized asset attribute information that is encrypted. By default, the unencrypted, customized asset attribute information is removed.
GROUP_ID¹⁸⁺	Type: Uint8Array Length: 7-127 bytes	No	Group to which the asset to be removed belongs. By default, this parameter is not specified.

Example

NOTE

The asset module provides an asynchronous API and a synchronous API for removing an asset. The following uses the asynchronous API as an example. For more information about the APIs, see Asset Store Service.

For details about how to remove an asset from a group, see Removing an Asset from a Group.

Remove asset demo_alias.

import { asset } from '@kit.AssetStoreKit';
import { util } from '@kit.ArkTS';
import { BusinessError } from '@kit.BasicServicesKit';

function stringToArray(str: string): Uint8Array {
  let textEncoder = new util.TextEncoder();
  return textEncoder.encodeInto(str);
}

let query: asset.AssetMap = new Map();
query.set(asset.Tag.ALIAS, stringToArray('demo_alias')); // Specify the asset alias to remove a single asset. To remove all assets, leave the alias unspecified.
try {
  asset.remove(query).then(() => {
    console.info(`Asset removed successfully.`);
  }).catch((err: BusinessError) => {
    console.error(`Failed to remove Asset. Code is ${err.code}, message is ${err.message}`);
  });
} catch (error) {
  let err = error as BusinessError;
  console.error(`Failed to remove Asset. Code is ${err.code}, message is ${err.message}`);
}