1# Removing Assets (C/C++) 2 3## Available APIs 4 5You can use [OH_Asset_Remove](../../reference/apis-asset-store-kit/capi-asset-api-h.md#oh_asset_remove) to remove an asset. 6 7The following table describes the asset attributes. 8 9>**NOTE** 10> 11>In the following table, the attributes starting with **ASSET_TAG_DATA_LABEL** are custom asset attributes reserved. These attributes are not encrypted. Therefore, do not put personal data in these attributes. 12 13| Attribute Name (Asset_Tag) | Attribute Content (Asset_Value) | Mandatory| Description | 14| ------------------------------- | ------------------------------------------------------------ | -------- | ------------------------------------------------ | 15| ASSET_TAG_ALIAS | Type: uint8[]<br>Length: 1-256 bytes | No | Asset alias, which uniquely identifies an asset. | 16| ASSET_TAG_ACCESSIBILITY | Type: uint32_t<br>Value range: see [Asset_Accessibility](../../reference/apis-asset-store-kit/capi-asset-type-h.md#asset_accessibility).| No | Access control based on the lock screen status. | 17| ASSET_TAG_REQUIRE_PASSWORD_SET | Type: bool | No | Whether the asset is accessible only when a lock screen password is set. The value **true** means the asset is accessible only when a lock screen password is set. The value **false** means that the asset can be accessed regardless of whether a lock screen password is set. | 18| ASSET_TAG_AUTH_TYPE | Type: uint32_t<br>Value range: see [Asset_AuthType](../../reference/apis-asset-store-kit/capi-asset-type-h.md#asset_authtype).| No | Type of user authentication required for accessing the asset. | 19| ASSET_TAG_SYNC_TYPE | Type: uint32_t<br>Value range: see [Asset_SyncType](../../reference/apis-asset-store-kit/capi-asset-type-h.md#asset_synctype).| No | Type of sync supported by the asset. | 20| ASSET_TAG_IS_PERSISTENT | Type: bool | No | Whether to retain the asset when the application is uninstalled. The value **true** means to retain the asset even after the application is uninstalled. The value **false** means the opposite. | 21| ASSET_TAG_DATA_LABEL_CRITICAL_1 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service with integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 22| ASSET_TAG_DATA_LABEL_CRITICAL_2 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service with integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 23| ASSET_TAG_DATA_LABEL_CRITICAL_3 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service with integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 24| ASSET_TAG_DATA_LABEL_CRITICAL_4 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service with integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 25| ASSET_TAG_DATA_LABEL_NORMAL_1 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service without integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 26| ASSET_TAG_DATA_LABEL_NORMAL_2 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service without integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 27| ASSET_TAG_DATA_LABEL_NORMAL_3 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service without integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 28| ASSET_TAG_DATA_LABEL_NORMAL_4 | Type: uint8[]<br>Length: 1-2048 bytes | No | Asset attribute information customized by the service without integrity protection.<br>**NOTE**: The data length is 1 to 512 bytes before API version 12.| 29| ASSET_TAG_DATA_LABEL_NORMAL_LOCAL_1<sup>12+</sup> | Type: uint8[]<br>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.| 30| ASSET_TAG_DATA_LABEL_NORMAL_LOCAL_2<sup>12+</sup> | Type: uint8[]<br>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.| 31| ASSET_TAG_DATA_LABEL_NORMAL_LOCAL_3<sup>12+</sup> | Type: uint8[]<br>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.| 32| ASSET_TAG_DATA_LABEL_NORMAL_LOCAL_4<sup>12+</sup> | Type: uint8[]<br>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.| 33| ASSET_TAG_REQUIRE_ATTR_ENCRYPTED<sup>14+</sup> | Type: bool| No| Whether to remove the encrypted data of service customized supplementary information. The value **true** means to remove the encrypted data of service customized supplementary information; the value **false** means to remove the non-encrypted data of service customized supplementary information. Default value: **false**.| 34| ASSET_TAG_GROUP_ID<sup>18+</sup> | Type: Uint8[]<br>Length: 7-127 bytes| No| Group to which the asset to be removed belongs. By default, this parameter is not specified.| 35 36## Example 37 38Remove asset **demo_alias**. 39 40For details about how to remove an asset in a group, see [Removing an Asset from a Group](asset-native-group-access-control.md#removing-an-asset-from-a-group). 41 421. Link the dynamic libraries in the CMake script. 43 ```txt 44 target_link_libraries(entry PUBLIC libasset_ndk.z.so) 45 ``` 46 472. Remove an asset. 48 ```c 49 #include <string.h> 50 51 #include "asset/asset_api.h" 52 53 void RemoveAsset() { 54 static const char *ALIAS = "demo_alias"; 55 Asset_Blob alias = { (uint32_t)(strlen(ALIAS)), (uint8_t *)ALIAS }; 56 57 Asset_Attr attr[] = { 58 { .tag = ASSET_TAG_ALIAS, .value.blob = alias }, // You can specify the asset alias to remove a single asset. To remove all assets, leave the alias unspecified. 59 }; 60 61 int32_t ret = OH_Asset_Remove(attr, sizeof(attr) / sizeof(attr[0])); 62 if (ret == ASSET_SUCCESS) { 63 // Asset removed successfully. 64 } else { 65 // Failed to remove Asset. 66 } 67 } 68 ``` 69