1# Removing Assets (C/C++) 2 3## Available APIs 4 5You can use [OH_Asset_Remove](../../reference/apis-asset-store-kit/_asset_api.md#oh_asset_remove) 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. 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/_asset_type.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. | 18| ASSET_TAG_AUTH_TYPE | Type: uint32_t<br>Value range: see [Asset_AuthType](../../reference/apis-asset-store-kit/_asset_type.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/_asset_type.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. | 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 customized asset attribute information that is encrypted. By default, the unencrypted, customized asset attribute information is removed.| 34 35## Example 36 37Remove asset **demo_alias**. 38 391. Add the dynamic library in the CMake script. 40 ```txt 41 target_link_libraries(entry PUBLIC libasset_ndk.z.so) 42 ``` 43 442. Add an asset. 45 ```c 46 #include <string.h> 47 48 #include "asset/asset_api.h" 49 50 void RemoveAsset() { 51 static const char *ALIAS = "demo_alias"; 52 Asset_Blob alias = { (uint32_t)(strlen(ALIAS)), (uint8_t *)ALIAS }; 53 54 Asset_Attr attr[] = { 55 { .tag = ASSET_TAG_ALIAS, .value.blob = alias }, // Specify the asset alias to remove a single asset. To remove all assets, leave the alias unspecified. 56 }; 57 58 int32_t ret = OH_Asset_Remove(attr, sizeof(attr) / sizeof(attr[0])); 59 if (ret == ASSET_SUCCESS) { 60 // Asset removed successfully. 61 } else { 62 // Failed to remove Asset. 63 } 64 } 65 ``` 66