harmony(鸿蒙)@ohos.environment (Directory Environment Capability)
@ohos.environment (Directory Environment Capability)
The Environment module provides APIs for obtaining the root directories of the storage and public files.
NOTE
- The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
- The APIs of this module are system APIs and cannot be called by third-party applications.
Modules to Import
import environment from '@ohos.environment';
environment.getStorageDataDir
getStorageDataDir():Promise<string>
Obtains the root directory of the storage. This API uses a promise to return the result.
System capability: SystemCapability.FileManagement.File.Environment
Return value
| Type | Description |
|---|---|
| Promise<string> | Promise returned with the root directory of the storage. |
Example
environment.getStorageDataDir().then(function(path){
console.info("getStorageDataDir successfully:"+ path);
}).catch(function(error){
console.info("getStorageDataDir failed with error:"+ error);
});
environment.getStorageDataDir
getStorageDataDir(callback:AsyncCallback<string>):void
Obtains the root directory of the storage. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.FileManagement.File.Environment
Parameters
| Name | Type | Mandatory | Description |
|---|---|---|---|
| callback | AsyncCallback<string> | Yes | Asynchronous callback used to return the root directory of the storage. |
Example
environment.getStorageDataDir(function(error, path){
// do something
});
environment.getUserDataDir
getUserDataDir():Promise<string>
Obtains the root directory of public files. This API uses a promise to return the result.
System capability: SystemCapability.FileManagement.File.Environment
Return value
| Type | Description |
|---|---|
| Promise<string> | Promise returned with the root directory of public files. |
Example
environment.getUserDataDir().then(function(path){
console.info("getUserDataDir successfully:"+ path);
}).catch(function(error){
console.info("getUserDataDir failed with error:"+ error);
});
environment.getUserDataDir
getUserDataDir(callback:AsyncCallback<string>): void
Obtains the root directory of public files. This API uses an asynchronous callback to return the result.
System capability: SystemCapability.FileManagement.File.Environment
Parameters
| Name | Type | Mandatory | Description |
|---|---|---|---|
| callback | AsyncCallback<string> | Yes | Asynchronous callback used to return the root directory of public files. |
Example
environment.getUserDataDir(function(error, path){
// do something
});
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