harmony 鸿蒙@ohos.distributedHardware.deviceManager (Device Management)

  • 2022-08-09
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@ohos.distributedHardware.deviceManager (Device Management)

The deviceManager module provides APIs for distributed device management.

System applications can call the APIs to do the following:

  • Subscribe to or unsubscribe from device state changes.
  • Discover peripheral untrusted devices.
  • Authenticate or deauthenticate a device.
  • Query the trusted device list.
  • Query local device information, including the device name, type, and ID.
  • Publish device information for discovery purposes.

NOTE

  • The initial APIs of this module are supported since API version 7. 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.
  • The APIs of this module are deprecated since API version 11. You are advised to use @ohos.distributedDeviceManager.

Modules to Import

import deviceManager from '@ohos.distributedHardware.deviceManager';

deviceManager.createDeviceManager

createDeviceManager(bundleName: string, callback: AsyncCallback<DeviceManager>): void

Creates a DeviceManager instance.

NOTE
This API is deprecated since API version 11. You are advised to use deviceManager.createDeviceManager.

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
bundleName string Yes Bundle name of the application.
callback AsyncCallback<DeviceManager> Yes Callback invoked to return the DeviceManager instance created.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  let dmInstance: deviceManager.DeviceManager|null = null;
  try {
    deviceManager.createDeviceManager("ohos.samples.jshelloworld", (err: BusinessError, data: deviceManager.DeviceManager) => {
      if (err) { 
        console.error("createDeviceManager errCode:" + err.code + ",errMessage:" + err.message);
        return;
      }
      console.info("createDeviceManager success");
      dmInstance = data;
    });
  } catch(err) {
    let e: BusinessError = err as BusinessError;
    console.error("createDeviceManager errCode:" + e.code + ",errMessage:" + e.message);
  }

DeviceInfo

Defines device information.

NOTE
This API is deprecated since API version 11. You are advised to use DeviceBasicInfo.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Type Mandatory Description
deviceId string Yes Unique identifier of the device.
deviceName string Yes Device name.
deviceType DeviceType Yes Device type.
networkId8+ string Yes Network ID of the device.
range9+ number Yes Distance between the device (discovered device) and the device that initiates device discovery.
authForm10+ AuthForm Yes Authentication type of the device.

DeviceType

Enumerates the device types.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
SPEAKER 0x0A Smart speaker.
PHONE 0x0E Phone.
TABLET 0x11 Tablet.
WEARABLE 0x6D Wearable.
TV 0x9C Smart TV.
CAR 0x83 Car.
UNKNOWN_TYPE 0 Unknown device type.

AuthForm10+

Enumerates the device authentication types.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
INVALID_TYPE -1 No authentication.
PEER_TO_PEER 0 Point-to-point authentication for devices without accounts.
IDENTICAL_ACCOUNT 1 Authentication for devices using the same account.
ACROSS_ACCOUNT 2 Authentication for devices using different accounts.

DeviceStateChangeAction

Enumerates the device states.

NOTE
This API is deprecated since API version 11. You are advised to use DeviceStateChange.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
ONLINE 0 The device is physically online.
READY 1 The information between devices has been synchronized in the Distributed Data Service (DDS) module, and the device is ready for running distributed services.
OFFLINE 2 The device is physically offline.
CHANGE 3 The device information is changed.

SubscribeInfo

Defines subscription information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Type Mandatory Description
subscribeId number Yes Subscription ID, used to identify a device discovery period.
mode DiscoverMode Yes Device discovery mode.
medium ExchangeMedium Yes Medium used for device discovery.
freq ExchangeFreq Yes Frequency of device discovery.
isSameAccount boolean No Whether the same account is used on the discovered device.
isWakeRemote boolean No Whether to wake up the discovered device.
capability SubscribeCap Yes Discovery capability.

DiscoverMode

Enumerates the device discovery modes.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
DISCOVER_MODE_PASSIVE 0x55 Passive discovery.
DISCOVER_MODE_ACTIVE 0xAA Active discovery.

ExchangeMedium

Enumerates the media used for device discovery.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
AUTO 0 Automatic.
BLE 1 Bluetooth.
COAP 2 Wi-Fi.
USB 3 USB.

ExchangeFreq

Enumerates the device discovery frequencies.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
LOW 0 Low frequency.
MID 1 Medium frequency.
HIGH 2 High frequency.
SUPER_HIGH 3 Ultra-high frequency.

SubscribeCap

Enumerates the discovery capabilities.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Value Description
SUBSCRIBE_CAPABILITY_DDMP 0 DDMP capability. This will be deprecated later.
SUBSCRIBE_CAPABILITY_OSD 1 OSD capability.

AuthParam

Defines the authentication parameters.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Type Mandatory Description
authType number Yes Authentication type.
extraInfo {[key:string] : any} No Extended field. Optional. The default value is undefined.

AuthInfo

Defines authentication information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Type Mandatory Description
authType number Yes Authentication type.
token number Yes Authentication token.
extraInfo {[key:string] : any} No Extended field. Optional. The default value is undefined.

PublishInfo9+

Defines published device information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

System capability: SystemCapability.DistributedHardware.DeviceManager

Name Type Mandatory Description
publishId number Yes ID used to identify a publication period.
mode DiscoverMode Yes Device discovery mode.
freq ExchangeFreq Yes Frequency of device discovery.
ranging boolean Yes Whether the device supports distance reporting.

DeviceManager

Provides APIs to obtain information about trusted devices and local devices. Before calling any API in DeviceManager, you must use createDeviceManager to create a DeviceManager instance, for example, dmInstance.

release

release(): void

Releases this DeviceManager instance when it is no longer used.

NOTE
This API is deprecated since API version 11. You are advised to use deviceManager.releaseDeviceManager.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import { BusinessError } from '@ohos.base'

  try {
    dmInstance.release();
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("release errCode:" + e.code + ",errMessage:" + e.message);
  }

getTrustedDeviceListSync

getTrustedDeviceListSync(): Array<DeviceInfo>

Obtains all trusted devices synchronously.

NOTE
This API is deprecated since API version 11. You are advised to use getAvailableDeviceListSync.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Return value

Name Description
Array<DeviceInfo> List of trusted devices obtained.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  try {
    let deviceInfoList: Array<deviceManager.DeviceInfo> = dmInstance.getTrustedDeviceListSync();
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("getTrustedDeviceListSync errCode:" + e.code + ",errMessage:" + e.message);
  }

getTrustedDeviceListSync10+

getTrustedDeviceListSync(isRefresh: boolean): Array&lt;DeviceInfo&gt;

Enables the DSoftBus heartbeat mode to quickly bring offline trusted devices online and updates the list of online trusted devices.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
isRefresh boolean Yes Whether to enable the heartbeat mode and update the list of online trusted devices.

Return value

Name Description
Array&lt;DeviceInfo&gt; List of trusted devices obtained.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  try {
    let deviceInfoList: Array<deviceManager.DeviceInfo> = dmInstance.getTrustedDeviceListSync(true);
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("getTrustedDeviceListSync errCode:" + e.code + ",errMessage:" + e.message);
  }

getTrustedDeviceList8+

getTrustedDeviceList(callback:AsyncCallback&lt;Array&lt;DeviceInfo&gt;&gt;): void

Obtains all trusted devices. This API uses an asynchronous callback to return the result.

NOTE
This API is deprecated since API version 11. You are advised to use getAvailableDeviceList.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;Array&lt;DeviceInfo&gt;&gt; Yes Callback invoked to return the list of trusted devices.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'
  try {
    dmInstance.getTrustedDeviceList((err: BusinessError, data: Array<deviceManager.DeviceInfo>) => {
      if (err) {
        console.error("getTrustedDeviceList errCode:" + err.code + ",errMessage:" + err.message);
        return;
      }
      console.log('get trusted device info: ' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("getTrustedDeviceList errCode:" + e.code + ",errMessage:" + e.message);
  }

getTrustedDeviceList8+

getTrustedDeviceList(): Promise&lt;Array&lt;DeviceInfo&gt;&gt;

Obtains all trusted devices. This API uses a promise to return the result.

NOTE
This API is deprecated since API version 11. You are advised to use getAvailableDeviceList.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Return value

Type Description
Promise&lt;Array&lt;DeviceInfo&gt;&gt; Promise used to return the result.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  dmInstance.getTrustedDeviceList().then((data: Array<deviceManager.DeviceInfo>) => {
    console.log('get trusted device info: ' + JSON.stringify(data));
    }).catch((err: BusinessError) => {
      console.error("getTrustedDeviceList errCode:" + err.code + ",errMessage:" + err.message);
  });

getLocalDeviceInfoSync8+

getLocalDeviceInfoSync(): DeviceInfo

Obtains local device information synchronously.

NOTE
This API is deprecated since API version 11. You are advised to use getLocalDeviceNetworkId, getLocalDeviceName, getLocalDeviceType, or getLocalDeviceId.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Return value

Name Description
DeviceInfo List of local devices obtained.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  try {
    let deviceInfo: deviceManager.DeviceInfo = dmInstance.getLocalDeviceInfoSync();
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("getLocalDeviceInfoSync errCode:" + e.code + ",errMessage:" + e.message);
  }

getLocalDeviceInfo8+

getLocalDeviceInfo(callback:AsyncCallback&lt;DeviceInfo&gt;): void

Obtains local device information. This API uses an asynchronous callback to return the result.

NOTE
This API is deprecated since API version 11. You are advised to use getLocalDeviceNetworkId, getLocalDeviceName, getLocalDeviceType, or getLocalDeviceId.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
callback AsyncCallback&lt;DeviceInfo&gt; Yes Callback invoked to return the local device information.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'


  try {
    dmInstance.getLocalDeviceInfo((err: BusinessError, data: deviceManager.DeviceInfo) => {
    if (err) {
      console.error("getLocalDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
      return;
    }
      console.log('get local device info: ' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("getLocalDeviceInfo errCode:" + e.code + ",errMessage:" + e.message);
  }

getLocalDeviceInfo8+

getLocalDeviceInfo(): Promise&lt;DeviceInfo&gt;

Obtains local device information. This API uses a promise to return the result.

NOTE
This API is deprecated since API version 11. You are advised to use getLocalDeviceNetworkId, getLocalDeviceName, getLocalDeviceType, or getLocalDeviceId.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Return value

Type Description
Promise&lt;DeviceInfo&gt; Promise used to return the result.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  dmInstance.getLocalDeviceInfo().then((data: deviceManager.DeviceInfo) => {
    console.log('get local device info: ' + JSON.stringify(data));
  }).catch((err: BusinessError) => {
    console.error("getLocalDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
  });

getDeviceInfo10+

getDeviceInfo(networkId: string, callback:AsyncCallback&lt;DeviceInfo&gt;): void

Obtains the information about a specific device based on the network ID. This API uses an asynchronous callback to return the result.

NOTE
This API is deprecated since API version 11. You are advised to use getDeviceName,getDeviceType.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
networkId string Yes Network ID of the device.
callback AsyncCallback&lt;DeviceInfo&gt; Yes Callback invoked to return the information about the specified device.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  try {
    // Network ID of the device, which can be obtained from the trusted device list
    let networkId = "xxxxxxx"
    dmInstance.getDeviceInfo(networkId, (err: BusinessError, data: deviceManager.DeviceInfo) => {
    if (err) {
      console.error("getDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
      return;
    }
      console.log('get device info: ' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("getDeviceInfo errCode:" + e.code + ",errMessage:" + e.message);
  }

getDeviceInfo10+

getDeviceInfo(networkId: string): Promise&lt;DeviceInfo&gt;

Obtains the information about a specific device based on the network ID. This API uses a promise to return the result.

NOTE
This API is deprecated since API version 11. You are advised to use getDeviceName or getDeviceType.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
networkId string Yes Network ID of the device.

Return value

Type Description
Promise&lt;DeviceInfo&gt; Promise used to return the result.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  // Network ID of the device, which can be obtained from the trusted device list
  let networkId = "xxxxxxx"
  dmInstance.getDeviceInfo(networkId).then((data: deviceManager.DeviceInfo) => {
    console.log('get device info: ' + JSON.stringify(data));
  }).catch((err: BusinessError) => {
    console.error("getDeviceInfo errCode:" + err.code + ",errMessage:" + err.message);
  });

startDeviceDiscovery8+

startDeviceDiscovery(subscribeInfo: SubscribeInfo): void

Starts to discover peripheral devices. The discovery process automatically stops when 2 minutes have elapsed. A maximum of 99 devices can be discovered.

NOTE
This API is deprecated since API version 11. You are advised to use startDiscovering.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
subscribeInfo SubscribeInfo Yes Subscription information.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.
11600104 Discovery invalid.

Example

  import { BusinessError } from '@ohos.base'

  interface SubscribeInfo {
    subscribeId: number,
    mode: number, // Active discovery
    medium: number,  // Automatic. Multiple media can be used for device discovery.
    freq: number,    // High frequency
    isSameAccount: boolean,
    isWakeRemote: boolean,
    capability: number
  };

  // Automatically generate a unique subscription ID.
  let subscribeId = Math.floor(Math.random() * 10000 + 1000);
  let subscribeInfo: SubscribeInfo = {
    subscribeId: subscribeId,
    mode: 0xAA, // Active discovery
    medium: 0,  // Automatic. Multiple media can be used for device discovery.
    freq: 2,    // High frequency
    isSameAccount: false,
    isWakeRemote: false,
    capability: 1
  };
  try {
    dmInstance.startDeviceDiscovery(subscribeInfo); // The deviceFound callback is called to notify the application when a device is discovered.
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("startDeviceDiscovery errCode:" + e.code + ",errMessage:" + e.message);
  }

startDeviceDiscovery9+

startDeviceDiscovery(subscribeInfo: SubscribeInfo, filterOptions?: string): void

Starts to discover peripheral devices and filters discovered devices. The discovery process automatically stops when 2 minutes have elapsed. A maximum of 99 devices can be discovered.

NOTE
This API is deprecated since API version 11. You are advised to use startDiscovering.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
subscribeInfo SubscribeInfo Yes Subscription information.
filterOptions string No Options for filtering discovered devices. Optional. The default value is undefined, which indicates discovery of offline devices.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.
11600104 Discovery invalid.

Example

  import { BusinessError } from '@ohos.base'

  interface Filters {
    type: string,
    value: number
  }

  interface FilterOptions {
    filter_op: string, // Optional. The default value is OR.
    filters: Filters[]
    }

  interface SubscribeInfo {
    subscribeId: number,
    mode: number, // Active discovery
    medium: number,  // Automatic. Multiple media can be used for device discovery.
    freq: number,    // High frequency
    isSameAccount: boolean,
    isWakeRemote: boolean,
    capability: number
  }

  // Automatically generate a unique subscription ID.
  let subscribeId = Math.floor(Math.random() * 10000 + 1000);
  let subscribeInfo: SubscribeInfo = {
    subscribeId: subscribeId,
    mode: 0xAA, // Active discovery
    medium: 0,  // Automatic. Multiple media can be used for device discovery.
    freq: 2,    // High frequency
    isSameAccount: false,
    isWakeRemote: false,
    capability: 1
  };

  let filters: Filters[] = [
    {
        type: "range",
        value: 50 // Filter discovered devices based on the distance (in cm).
    }
  ]

  let filterOptions: FilterOptions = {
    filter_op: "OR", // Optional. The default value is OR.
    filters: filters
  };
  try {
    dmInstance.startDeviceDiscovery(subscribeInfo, JSON.stringify(filterOptions)); // The deviceFound callback is invoked to notify the application when a device is discovered.
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("startDeviceDiscovery errCode:" + e.code + ",errMessage:" + e.message);
  }

stopDeviceDiscovery

stopDeviceDiscovery(subscribeId: number): void

Stops device discovery.

NOTE
This API is deprecated since API version 11. You are advised to use stopDiscovering.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
subscribeId number Yes Subscription ID.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import { BusinessError } from '@ohos.base'

  try {
    // stopDeviceDiscovery and startDeviceDiscovery must be used in pairs, and the input parameter **subscribeId** passed in them must be the same.
    let subscribeId = 12345;
    dmInstance.stopDeviceDiscovery(subscribeId);
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("stopDeviceDiscovery errCode:" + e.code + ",errMessage:" + e.message);
  }

publishDeviceDiscovery9+

publishDeviceDiscovery(publishInfo: PublishInfo): void

Publishes device information for discovery purposes. The publish process automatically stops when 2 minutes have elapsed.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
publishInfo PublishInfo Yes Device information to publish.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.
11600105 Publish invalid.

Example

  import { BusinessError } from '@ohos.base'

  interface PublishInfo {
    publishId: number,
    mode: number, // Active discovery
    freq: number,    // High frequency
    ranging: boolean // Whether the device supports reporting the distance to the discovery initiator.
  };

  // Automatically generate a unique subscription ID.
  let publishId = Math.floor(Math.random() * 10000 + 1000);
  let publishInfo: PublishInfo = {
    publishId: publishId,
    mode: 0xAA, // Active discovery
    freq: 2,    // High frequency
    ranging: true  // The device supports reporting the distance to the discovery initiator.
  };

  try {
    dmInstance.publishDeviceDiscovery(publishInfo); // A callback is invoked to notify the application when the device information is published.
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("publishDeviceDiscovery errCode:" + e.code + ",errMessage:" + e.message);
  }

unPublishDeviceDiscovery9+

unPublishDeviceDiscovery(publishId: number): void

Stops publishing device information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
publishId number Yes Publish ID.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import { BusinessError } from '@ohos.base'

  try {
    // unPublishDeviceDiscovery and publishDeviceDiscovery must be used in pairs, and the input parameter **publishId** passed in them must be the same.
    let publishId = 12345;
    dmInstance.unPublishDeviceDiscovery(publishId);
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("unPublishDeviceDiscovery errCode:" + e.code + ",errMessage:" + e.message);
  }

authenticateDevice

authenticateDevice(deviceInfo: DeviceInfo, authParam: AuthParam, callback: AsyncCallback&lt;{deviceId: string, pinToken ?: number}&gt;): void

Authenticates a device.

NOTE
This API is deprecated since API version 11. You are advised to use bindTarget.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
deviceInfo DeviceInfo Yes Device information.
authParam AuthParam Yes Authentication parameter.
callback AsyncCallback&lt;{deviceId:&nbsp;string,&nbsp;pinToken&nbsp;?:&nbsp;number}&gt; Yes Callback invoked to return the authentication result.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    deviceId: string = ""
    pinToken?: number = 0
  }

  interface DeviceInfo {
    deviceId: string,
    deviceName: string
    deviceType: number,
    networkId: string,
    range: number
  };

  interface ExtraInfo {
    targetPkgName: string,
    appName: string,
    appDescription: string,
    business: string
  }

  interface AuthParam {
    authType: number,//Authentication type. The value 1 means no account PIN authentication.
    extraInfo: ExtraInfo
  }

  // Information about the device to authenticate. The information can be obtained from the device discovery result.
  let deviceInfo: deviceManager.DeviceInfo = {
    deviceId: "XXXXXXXX",
    deviceName: "",
    deviceType: 0x0E,
    networkId: "xxxxxxx",
    range: 0,
    authForm: 0
  };
  let extraInfo: ExtraInfo = {
    targetPkgName: 'ohos.samples.xxx',
    appName: 'xxx',
    appDescription: 'xxx',
    business: '0'
  }
  let authParam: AuthParam = {
    authType: 1,// Authentication type. The value 1 means no account PIN authentication.
    extraInfo: extraInfo
  }

  try {
    dmInstance.authenticateDevice(deviceInfo, authParam, (err: BusinessError, data: Data) => {
      if (err) {
          console.error("authenticateDevice errCode:" + err.code + ",errMessage:" + err.message);
          return;
      }
      console.info("authenticateDevice result:" + JSON.stringify(data));
      let token = data.pinToken;
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("authenticateDevice errCode:" + e.code + ",errMessage:" + e.message);
  }

unAuthenticateDevice8+

unAuthenticateDevice(deviceInfo: DeviceInfo): void

Deauthenticates a device.

NOTE
This API is deprecated since API version 11. You are advised to use unbindTarget.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
deviceInfo DeviceInfo Yes Device information.

Error codes

For details about the error codes, see Device Management Error Codes.

ID Error Message
11600101 Failed to execute the function.

Example

  import { BusinessError } from '@ohos.base'

  interface DeviceInfo {
    deviceId: string,
    deviceName: string,
    deviceType: number,
    networkId: string,
    range: number
  }

  try {
    let deviceInfo: deviceManager.DeviceInfo = {
      deviceId: "XXXXXXXX",
      deviceName: "",
      deviceType: 0x0E,
      networkId: "xxxxxxx",
      range: 0,
      authForm: 0
    };
    dmInstance.unAuthenticateDevice(deviceInfo);
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("unAuthenticateDevice errCode:" + e.code + ",errMessage:" + e.message);
  }

verifyAuthInfo

verifyAuthInfo(authInfo: AuthInfo, callback: AsyncCallback&lt;{deviceId: string, level: number}&gt;): void

Verifies authentication information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
authInfo AuthInfo Yes Authentication information.
callback AsyncCallback&lt;{deviceId:&nbsp;string,&nbsp;level:&nbsp;number}&gt; Yes Callback invoked to return the verification result.

Example

  import { BusinessError } from '@ohos.base'

  interface ExtraInfo {
    authType: number,
    token: number
  }

  interface AuthInfo {
    authType: number,
    token: number,
    extraInfo: ExtraInfo
  }

  class Data {
    deviceId: string = ""
    level: number = 0
  }

  let extraInfo: ExtraInfo = {
    authType: 0,
    token: 0
  }

  let authInfo: AuthInfo = {
    authType: 1,
    token: 123456,
    extraInfo: extraInfo
  }
  try {
    dmInstance.verifyAuthInfo(authInfo, (err: BusinessError, data: Data) => {
      if (err) {
          console.error("verifyAuthInfo errCode:" + err.code + ",errMessage:" + err.message);
          return;
    }
    console.info("verifyAuthInfo result:" + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("verifyAuthInfo errCode:" + e.code + ",errMessage:" + e.message);
  }

setUserOperation9+

setUserOperation(operateAction: number, params: string): void;

Sets a user operation.

NOTE
This API is deprecated since API version 11. You are advised to use replyUiAction.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
operateAction number Yes User operation.
params string Yes Input parameters of the user.

Example

  import { BusinessError } from '@ohos.base'

 try {
    /*
      operateAction = 0 - Grant the permission.
      operateAction = 1 - Revoke the permission.
      operateAction = 2 - The user operation in the permission request dialog box times out.
      operateAction = 3 - Cancel the display of the PIN box.
      operateAction = 4 - Cancel the display of the PIN input box.
      operateAction = 5 - Confirm the input in the PIN input box.
    */
    let operation = 0;
    dmInstance.setUserOperation(operation, "extra")
    } catch (err) {
      let e: BusinessError = err as BusinessError;
      console.error("setUserOperation errCode:" + e.code + ",errMessage:" + e.message);
  }

requestCredentialRegisterInfo10+

requestCredentialRegisterInfo(requestInfo: string, callback: AsyncCallback<{registerInfo: string}>): void;

Obtains the registration information of the credential.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
requestInfo string Yes Request credential information.
callback AsyncCallback<{registerInfo: string}> Yes Callback invoked to return the credential registration information.

Example

  import { BusinessError } from '@ohos.base'

  interface CredentialInfo {
    version: string,
    userId: string
  }

  class Data {
    registerInfo: string = ""
  }

  let credentialInfo: CredentialInfo = {
    version: "1.2.3",
    userId: "123"
  }
  try {
    var jsonCredentialInfo = JSON.stringify(credentialInfo)
    dmInstance.requestCredentialRegisterInfo(jsonCredentialInfo, (err: BusinessError, data: Data) => {
      if (data) {
          console.info("requestCredentialRegisterInfo result:" + JSON.stringify(data));
      } else {
          console.info("requestCredentialRegisterInfo result: data is null");
      }
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("requestCredentialRegisterInfo err:" + e.code + "," + e.message);
  }

importCredential10+

importCredential(credentialInfo: string, callback: AsyncCallback<{resultInfo: string}>): void;

Imports credential information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
credentialInfo string Yes Credential information to import.
callback AsyncCallback<{resultInfo: string}> Yes Callback invoked to return the result.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    resultInfo: string = ""
  }

  interface CredentialData {
    credentialType: number,
    credentialId: string,
    serverPk: string,
    pkInfoSignature : string,
    pkInfo: string,
    authCode: string,
    peerDeviceId: string
  }

  interface CredentialInfo {
    processType: number,
    authType: number,
    userId: string,
    deviceId: string,
    version: string,
    devicePk : string,
    credentialData : CredentialData
  }

  let credentialData: CredentialData = {
    credentialType: 2,
    credentialId: "102",
    serverPk: "3059301306072A8648CE3D020106082A8648CE3D03",
    pkInfoSignature : "30440220490BCB4F822004C9A76AB8D97F80041FC0E",
    pkInfo: "",
    authCode: "",
    peerDeviceId: ""
  }


  let credentialInfo: CredentialInfo = {
    processType: 1,
    authType: 1,
    userId: "123",
    deviceId: "aaa",
    version: "1.2.3",
    devicePk : "0000",
    credentialData : credentialData
  }

  try {
    var jsonCredentialInfo = JSON.stringify(credentialInfo)
    dmInstance.importCredential(jsonCredentialInfo, (err: BusinessError, data: Data) => {
      if (data) {
          console.info("importCredential result:" + JSON.stringify(data));
      } else {
          console.info("importCredential result: data is null");
      }
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("importCredential err:" + e.code + "," + e.message);
  }

deleteCredential10+

deleteCredential(queryInfo: string, callback: AsyncCallback<{resultInfo: string}>): void;

Deletes credential information.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
queryInfo string Yes Credential information to delete.
callback AsyncCallback<{resultInfo: string}> Yes Callback invoked to return the result.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    resultInfo: string = ""
  }

  interface QueryInfo {
    processType: number,
    authType: number,
    userId: string
  }

  let queryInfo: QueryInfo = {
    processType: 1,
    authType: 1,
    userId: "123"
  }

  try {
    var jsonQueryInfo = JSON.stringify(queryInfo)
    dmInstance.deleteCredential(jsonQueryInfo, (err: BusinessError, data: Data) => {
      if (data) {
          console.info("deleteCredential result:" + JSON.stringify(data));
      } else {
          console.info("deleteCredential result: data is null");
      }
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("deleteCredential err:" + e.code + "," + e.message);
  }

on(‘uiStateChange’)9+

on(type: ‘uiStateChange’, callback: Callback&lt;{ param: string}&gt;): void;

Subscribes to UI status changes.

NOTE
This API is deprecated since API version 11. You are advised to use on(‘replyResult’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘uiStateChange’ indicates UI status changes.
callback Callback&lt;{&nbsp;param:&nbsp;string}&gt; Yes Callback invoked to return the UI status.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    param: string = ""
  }

  interface TmpStr {
    verifyFailed: boolean
  }

  try {
    dmInstance.on('uiStateChange', (data: Data) => {
    console.log("uiStateChange executed, dialog closed" + JSON.stringify(data))
    let tmpStr: TmpStr = JSON.parse(data.param)
    let isShow = tmpStr.verifyFailed
    console.log("uiStateChange executed, dialog closed" + isShow)
  });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("uiStateChange errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘uiStateChange’)9+

off(type: ‘uiStateChange’, callback?: Callback&lt;{ param: string}&gt;): void;

Unsubscribes from UI status changes.

NOTE
This API is deprecated since API version 11. You are advised to use off(‘replyResult’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘uiStateChange’ indicates UI status changes.
callback Callback&lt;{&nbsp;param:&nbsp;string}&gt; No Callback for the UI status change.

Example

  import { BusinessError } from '@ohos.base'

  try {
    dmInstance.off('uiStateChange');
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("uiStateChange errCode:" + e.code + ",errMessage:" + e.message);
  }

on(‘deviceStateChange’)

on(type: ‘deviceStateChange’, callback: Callback&lt;{ action: DeviceStateChangeAction, device: DeviceInfo }&gt;): void

Subscribes to device state changes.

NOTE
This API is deprecated since API version 11. You are advised to use on(‘deviceStateChange’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘deviceStateChange’ indicates device state changes.
callback Callback&lt;{&nbsp;action:&nbsp;DeviceStateChangeAction,&nbsp;device:&nbsp;DeviceInfo&nbsp;}&gt; Yes Callback invoked to return the device information and state.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  class Data {
    action: deviceManager.DeviceStateChangeAction = 0
    device: deviceManager.DeviceInfo = {
      deviceId: "",
      deviceName: "",
      deviceType: 0,
      networkId: "",
      range: 0,
      authForm:0,
    }
  }

  try {
    dmInstance.on('deviceStateChange', (data: Data) => {
      console.info("deviceStateChange on:" + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("deviceStateChange errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘deviceStateChange’)

off(type: ‘deviceStateChange’, callback?: Callback&lt;{ action: DeviceStateChangeAction, device: DeviceInfo }&gt;): void

Unsubscribes from device state changes.

NOTE
This API is deprecated since API version 11. You are advised to use off(‘deviceStateChange’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘deviceStateChange’ indicates device state changes.
callback Callback&lt;{&nbsp;action:&nbsp;DeviceStateChangeAction,&nbsp;device:&nbsp;DeviceInfo&nbsp;}&gt; No Callback for the device state change.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  class Data {
    action: deviceManager.DeviceStateChangeAction = 0
    device: deviceManager.DeviceInfo = {
      deviceId: "",
      deviceName: "",
      deviceType: 0,
      networkId: "",
      range: 0,
      authForm:0,
    }
  }

  try {
    dmInstance.off('deviceStateChange', (data: Data) => {
      console.info('deviceStateChange' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("deviceStateChange errCode:" + e.code + ",errMessage:" + e.message);
  }

on(‘deviceFound’)

on(type: ‘deviceFound’, callback: Callback&lt;{ subscribeId: number, device: DeviceInfo }&gt;): void

Subscribes to device discovery events.

NOTE
This API is deprecated since API version 11. You are advised to use on(‘discoverSuccess’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘deviceFound’ indicates discovery of a device.
callback Callback&lt;{&nbsp;subscribeId:&nbsp;number,&nbsp;device:&nbsp;DeviceInfo&nbsp;}&gt; Yes Callback invoked to return the discovery of a device.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  class Data {
    subscribeId: number = 0
    device: deviceManager.DeviceInfo = {
      deviceId: "",
      deviceName: "",
      deviceType: 0,
      networkId: "",
      range: 0,
      authForm:0,
    }
  }

  try {
    dmInstance.on('deviceFound', (data: Data) => {
      console.info("deviceFound:" + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("deviceFound errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘deviceFound’)

off(type: ‘deviceFound’, callback?: Callback&lt;{ subscribeId: number, device: DeviceInfo }&gt;): void

Unsubscribes from device discovery events.

NOTE
This API is deprecated since API version 11. You are advised to use off(‘discoverSuccess’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘deviceFound’ indicates discovery of a device.
callback Callback&lt;{&nbsp;subscribeId:&nbsp;number,&nbsp;device:&nbsp;DeviceInfo&nbsp;}&gt; No Callback for the device discovery event.

Example

  import deviceManager from '@ohos.distributedHardware.deviceManager';
  import { BusinessError } from '@ohos.base'

  class Data {
    subscribeId: number = 0
    device: deviceManager.DeviceInfo = {
      deviceId: "",
      deviceName: "",
      deviceType: 0,
      networkId: "",
      range: 0,
      authForm:0,
    }
  }

  try {
    dmInstance.off('deviceFound', (data: Data) => {
      console.info('deviceFound' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("deviceFound errCode:" + e.code + ",errMessage:" + e.message);
  }

on(‘discoverFail’)

on(type: ‘discoverFail’, callback: Callback&lt;{ subscribeId: number, reason: number }&gt;): void

Subscribes to device discovery failures.

NOTE
This API is deprecated since API version 11. You are advised to use on(‘discoverFailure’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘discoverFail’ indicates a failure in discovering devices.
callback Callback&lt;{&nbsp;subscribeId:&nbsp;number,&nbsp;reason:&nbsp;number&nbsp;}&gt; Yes Callback invoked to report a device discovery failure.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    subscribeId: number = 0
    reason: number = 0
  }

  try {
    dmInstance.on('discoverFail', (data: Data) => {
        console.info("discoverFail on:" + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("discoverFail errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘discoverFail’)

off(type: ‘discoverFail’, callback?: Callback&lt;{ subscribeId: number, reason: number }&gt;): void

Unsubscribes from device discovery failures.

NOTE
This API is deprecated since API version 11. You are advised to use off(‘discoverFailure’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘discoverFail’ indicates a failure in discovering devices.
callback Callback&lt;{&nbsp;subscribeId:&nbsp;number,&nbsp;reason:&nbsp;number&nbsp;}&gt; No Callback for the device discovery failure.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    subscribeId: number = 0
    reason: number = 0
  }

  try {
    dmInstance.off('discoverFail', (data: Data) => {
      console.info('discoverFail' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("discoverFail errCode:" + e.code + ",errMessage:" + e.message);
  }

on(‘publishSuccess’)9+

on(type: ‘publishSuccess’, callback: Callback&lt;{ publishId: number }&gt;): void

Subscribes to device information publication success events.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘publishSuccess’ indicates an event reported when device information is published.
callback Callback&lt;{&nbsp;publishId:&nbsp;number&nbsp;}&gt; Yes Callback invoked to return the publish ID.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    publishId: number = 0
  }

  try {
    dmInstance.on('publishSuccess', (data: Data) => {
      console.info("publishSuccess:" + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("publishSuccess errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘publishSuccess’)9+

off(type: ‘publishSuccess’, callback?: Callback&lt;{ publishId: number }&gt;): void

Unsubscribes from device information publication success events.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘publishSuccess’ indicates an event of the success in publishing device information.
callback Callback&lt;{&nbsp;publishId:&nbsp;number&nbsp;}&gt; No Callback for the device information publication success event.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    publishId: number = 0
  }

  try {
    dmInstance.off('publishSuccess', (data: Data) => {
      console.info('publishSuccess' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("publishSuccess errCode:" + e.code + ",errMessage:" + e.message);
  }

on(‘publishFail’)9+

on(type: ‘publishFail’, callback: Callback&lt;{ publishId: number, reason: number }&gt;): void

Subscribes to device information publication failures.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘publishFail’ indicates an event reported when publishing device information fails.
callback Callback&lt;{&nbsp;publishId:&nbsp;number,&nbsp;reason:&nbsp;number&nbsp;}&gt; Yes Callback invoked to report a publication failure.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    publishId: number = 0
    reason: number = 0
  }

  try {
    dmInstance.on('publishFail', (data: Data) => {
      console.info("publishFail on:" + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("publishFail errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘publishFail’)9+

off(type: ‘publishFail’, callback?: Callback&lt;{ publishId: number, reason: number }&gt;): void

Unsubscribes from device information publication failures.

NOTE
This API is deprecated since API version 11. There is no substitute API.

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘publishFail’ indicates a failure in publishing device information.
callback Callback&lt;{&nbsp;publishId:&nbsp;number,&nbsp;reason:&nbsp;number&nbsp;}&gt; No Callback for the device information publication failure.

Example

  import { BusinessError } from '@ohos.base'

  class Data {
    publishId: number = 0
    reason: number = 0
  }

  try {
    dmInstance.off('publishFail', (data: Data) => {
      console.info('publishFail' + JSON.stringify(data));
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("publishFail errCode:" + e.code + ",errMessage:" + e.message);
  }

on(‘serviceDie’)

on(type: ‘serviceDie’, callback: () =&gt; void): void

Subscribes to dead events of the DeviceManager service.

NOTE
This API is deprecated since API version 11. You are advised to use on(‘serviceDie’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘serviceDie’ indicates an event reported when the DeviceManager service is terminated unexpectedly.
callback ()&nbsp;=&gt;&nbsp;void Yes Callback invoked when a dead event of the DeviceManager service occurs.

Example

  import { BusinessError } from '@ohos.base'

  try {
    dmInstance.on("serviceDie", () => {
      console.info("serviceDie on");
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("serviceDie errCode:" + e.code + ",errMessage:" + e.message);
  }

off(‘serviceDie’)

off(type: ‘serviceDie’, callback?: () =&gt; void): void

Unsubscribes from dead events of the DeviceManager service.

NOTE
This API is deprecated since API version 11. You are advised to use off(‘serviceDie’).

Required permissions: ohos.permission.ACCESS_SERVICE_DM

System capability: SystemCapability.DistributedHardware.DeviceManager

Parameters

Name Type Mandatory Description
type string Yes Event type. The value ‘serviceDie’ indicates a dead event of the DeviceManager service.
callback ()&nbsp;=&gt;&nbsp;void No Callback for the dead event of the DeviceManager service.

Example

  import { BusinessError } from '@ohos.base'

  try {
    dmInstance.off("serviceDie", () => {
      console.info("serviceDie off");
    });
  } catch (err) {
    let e: BusinessError = err as BusinessError;
    console.error("serviceDie errCode:" + e.code + ",errMessage:" + e.message);
  }

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