harmony 鸿蒙@ohos.enterprise.usbManager (USB Management)
@ohos.enterprise.usbManager (USB Management)
The usbManager module provides APIs for USB management.
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.
The APIs of this module can be used only in the stage model.
The APIs provided by this module can be called only by a device administrator application that is enabled.
Modules to Import
import usbManager from '@ohos.enterprise.usbManager';
usbManager.setUsbPolicy
setUsbPolicy(admin: Want, usbPolicy: UsbPolicy, callback: AsyncCallback<void>): void
Sets the USB read/write policy through the specified device administrator application. This API uses an asynchronous callback to return the result.
Required permissions: ohos.permission.ENTERPRISE_MANAGE_USB
System capability: SystemCapability.Customization.EnterpriseDeviceManager
System API: This is a system API.
Parameters
| Name | Type | Mandatory | Description |
|---|---|---|---|
| admin | Want | Yes | Device administrator application. |
| usbPolicy | UsbPolicy | Yes | USB read/write policy to set. |
| callback | AsyncCallback<void> | Yes | Callback invoked to return the result. If the operation is successful, err is null. Otherwise, err is an error object. |
Error codes
For details about the error codes, see Enterprise Device Management Error Codes.
| ID | Error Message |
|---|---|
| 9200001 | the application is not an administrator of the device. |
| 9200002 | the administrator application does not have permission to manage the device. |
Example
import Want from '@ohos.app.ability.Want';
let wantTemp: Want = {
bundleName: 'bundleName',
abilityName: 'abilityName',
};
let policy: usbManager.UsbPolicy = usbManager.UsbPolicy.READ_WRITE
usbManager.setUsbPolicy(wantTemp, policy, (err) => {
if (err) {
console.error(`Failed to set usb policy. Code is ${err.code}, message is ${err.message}`);
return;
}
console.info('Succeeded in setting usb policy');
})
usbManager.setUsbPolicy
setUsbPolicy(admin: Want, usbPolicy: UsbPolicy): Promise<void>
Sets the USB read/write policy through the specified device administrator application. This API uses a promise to return the result.
Required permissions: ohos.permission.ENTERPRISE_MANAGE_USB
System capability: SystemCapability.Customization.EnterpriseDeviceManager
System API: This is a system API.
Parameters
| Name | Type | Mandatory | Description |
|---|---|---|---|
| admin | Want | Yes | Device administrator application. |
| usbPolicy | UsbPolicy | Yes | USB read/write policy to set. |
Return value
| Type | Description |
|---|---|
| Promise<void> | Promise that returns no value. An error object will be thrown if the operation fails. |
Error codes
For details about the error codes, see Enterprise Device Management Error Codes.
| ID | Error Message |
|---|---|
| 9200001 | the application is not an administrator of the device. |
| 9200002 | the administrator application does not have permission to manage the device. |
Example
import Want from '@ohos.app.ability.Want';
import { BusinessError } from '@ohos.base';
let wantTemp: Want = {
bundleName: 'bundleName',
abilityName: 'abilityName',
};
let policy: usbManager.UsbPolicy = usbManager.UsbPolicy.READ_WRITE
usbManager.setUsbPolicy(wantTemp, policy).then(() => {
console.info('Succeeded in setting usb policy');
}).catch((err: BusinessError) => {
console.error(`Failed to set usb policy. Code is ${err.code}, message is ${err.message}`);
})
UsbPolicy
Enumerates the USB read/write policies.
System capability: SystemCapability.Customization.EnterpriseDeviceManager
System API: This is a system API.
| Name | Value | Description |
|---|---|---|
| READ_WRITE | 0 | The USB is readable and writable. |
| READ_ONLY | 1 | The USB is read-only. |
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