harmony 鸿蒙@ohos.cooperate (Screen Hopping)

2023-06-24
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@ohos.cooperate (Screen Hopping)

The cooperate module implements screen hopping for two or more networked devices to share the keyboard and mouse for collaborative operations.

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 provided by this module are system APIs.

Modules to Import

import cooperate from '@ohos.cooperate'

cooperate.prepare

prepare(callback: AsyncCallback<void>): void;

Prepares for screen hopping. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result. If the operation is successful, err is undefined. Otherwise, err is an error object.

Example

import BusinessError from '@ohos.base';
try {
  cooperate.prepare((error: BusinessError) => {
    if (error) {
      console.log(`Keyboard mouse crossing prepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Keyboard mouse crossing prepare success.`);
  });
} catch (error) {
  console.log(`Keyboard mouse crossing prepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.prepare

prepare(): Promise<void>

Prepares for screen hopping. This API uses a promise to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Return value

Parameters	Description
Promise<void>	Promise that returns no value.

Example

import BusinessError from '@ohos.base';
try {
  cooperate.prepare().then(() => {
    console.log(`Keyboard mouse crossing prepare success.`);
  }, (error: BusinessError) => {
    console.log(`Keyboard mouse crossing prepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
  });
} catch (error) {
  console.log(`Keyboard mouse crossing prepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.unprepare

unprepare(callback: AsyncCallback<void>): void;

Cancels the preparation for screen hopping. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Name	Type	Mandatory	Description
callback	AsyncCallback<void>	Yes	Callback used to return the result. If the operation is successful, err is undefined. Otherwise, err is an error object.

Example

import BusinessError from '@ohos.base';
try {
  cooperate.unprepare((error: BusinessError) => {
    if (error) {
      console.log(`Keyboard mouse crossing unprepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Keyboard mouse crossing unprepare success.`);
  });
} catch (error) {
  console.log(`Keyboard mouse crossing unprepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.unprepare

unprepare(): Promise<void>;

Cancels the preparation for screen hopping. This API uses a promise to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Return value

Parameters	Description
Promise<void>	Promise that returns no value.

import BusinessError from '@ohos.base';
try {
  cooperate.unprepare().then(() => {
    console.log(`Keyboard mouse crossing unprepare success.`);
  }, (error: BusinessError) => {
    console.log(`Keyboard mouse crossing unprepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
  });
} catch (error) {
  console.log(`Keyboard mouse crossing unprepare failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.activate

activate(targetNetworkId: string, inputDeviceId: number, callback: AsyncCallback<void>): void;

Starts screen hopping. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
targetNetworkId	string	Yes	Descriptor of the target device for screen hopping.
inputDeviceId	number	Yes	Identifier of the input device for screen hopping.
callback	AsyncCallback<void>	Yes	Callback used to return the result. If the operation is successful, err is undefined. Otherwise, err is an error object.

Error codes

For details about the error codes, see Screen Hopping Error Codes.

ID	Error Message
20900001	Operation failed.

Example

import BusinessError from '@ohos.base';
let targetNetworkId = "networkId";
let inputDeviceId = 0;
try {
  cooperate.activate(targetNetworkId, inputDeviceId, (error: BusinessError) => {
    if (error) {
      console.log(`Start Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Start Keyboard mouse crossing success.`);
  });
} catch (error) {
  console.log(`Start Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.activate

activate(targetNetworkId: string, inputDeviceId: number): Promise<void>;

Starts screen hopping. This API uses a promise to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
targetNetworkId	string	Yes	Descriptor of the target device for screen hopping.
inputDeviceId	number	Yes	Identifier of the input device for screen hopping.

Return value

Name	Description
Promise<void>	Promise that returns no value.

Error codes

For details about the error codes, see Screen Hopping Error Codes.

ID	Error Message
20900001	Operation failed.

Example

import BusinessError from '@ohos.base';
let targetNetworkId = "networkId";
let inputDeviceId = 0;
try {
 cooperate.activate(targetNetworkId, inputDeviceId).then(() => {
    console.log(`Start Keyboard mouse crossing success.`);
  }, (error: BusinessError) => {
    console.log(`Start Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
  });
} catch (error) {
  console.log(`Start Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.deactivate

deactivate(isUnchained: boolean, callback: AsyncCallback<void>): void;

Stops screen hopping. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
isUnchained	boolean	Yes	Whether to disable the cross-device link. The value true means to disable the cross-device link, and the value false means the opposite.
callback	AsyncCallback<void>	Yes	Callback used to return the result. If the operation is successful, err is undefined. Otherwise, err is an error object.

Example

import BusinessError from '@ohos.base';
try {
  cooperate.deactivate(false, (error: BusinessError) => {
    if (error) {
      console.log(`Stop Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Stop Keyboard mouse crossing success.`);
  });
} catch (error) {
  console.log(`Stop Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.deactivate

deactivate(isUnchained: boolean): Promise<void>;

Stops screen hopping. This API uses a promise to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
isUnchained	boolean	Yes	Whether to disable the cross-device link. The value true means to disable the cross-device link, and the value false means the opposite.

Return value

Name	Description
Promise<void>	Promise that returns no value.

Example

import BusinessError from '@ohos.base';
try {
  cooperate.deactivate(false).then(() => {
    console.log(`Stop Keyboard mouse crossing success.`);
  }, (error: BusinessError) => {
    console.log(`Stop Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
  });
} catch (error) {
  console.log(`Stop Keyboard mouse crossing failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.getCrossingSwitchState

getCrossingSwitchState(networkId: string, callback: AsyncCallback<boolean>): void;

Obtains the screen hopping status of the target device. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
networkId	string	Yes	Descriptor of the target device for screen hopping.
callback	AsyncCallback<boolean>	Yes	Callback used to return the result. The value true indicates that screen hopping is enabled, and the value false indicates the opposite.

Example

import BusinessError from '@ohos.base';
let deviceDescriptor = "networkId";
try {
  cooperate.getCrossingSwitchState(deviceDescriptor, (error: BusinessError, data: boolean) => {
    if (error) {
      console.log(`Get the status failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
      return;
    }
    console.log(`Get the status success, data: ${JSON.stringify(data)}`);
  });
} catch (error) {
  console.log(`Get the status failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

cooperate.getCrossingSwitchState

getCrossingSwitchState(networkId: string): Promise<boolean>;

Obtains the screen hopping status of the target device. This API uses a promise to return the result.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
networkId	string	Yes	Descriptor of the target device for screen hopping.

Return value

Parameters	Description
Promise<boolean>	Promise used to return the result. The value true indicates that screen hopping is enabled, and the value false indicates the opposite.

Example

import BusinessError from '@ohos.base';
let deviceDescriptor = "networkId";
try {
  cooperate.getCrossingSwitchState(deviceDescriptor).then((data: boolean) => {
    console.log(`Get the status success, data: ${JSON.stringify(data)}`);
  }, (error: BusinessError) => {
    console.log(`Get the status failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
  });
} catch (error) {
  console.log(`Get the status failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

on(‘cooperate’)

on(type: ‘cooperate’, callback: Callback<{ networkId: string, msg: CooperateMsg }>): void;

Enables listening for screen hopping status change events.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is cooperate.
callback	Callback<{ networkId: string, msg: CooperateMsg }>	Yes	Callback used to return the result.

Example

function callback(networkId: string, msg: cooperate.CooperateMsg) {
  console.log(`Keyboard mouse crossing event: ${JSON.stringify(networkId)}`);
  return false;
}
try {
  cooperate.on('cooperate', callback);
} catch (error) {
  console.log(`Register failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

off(‘cooperate’)

off(type: ‘cooperate’, callback?: Callback<void>): void;

Disables listening for screen hopping status change events.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Parameters

Name	Type	Mandatory	Description
type	string	Yes	Event type. The value is cooperate.
callback	AsyncCallback<void>	No	Callback to be unregistered. If this parameter is not specified, all callbacks registered by the current application will be unregistered.

Example

// Unregister a single callback.
function callbackOn(networkId: string, msg: cooperate.CooperateMsg) {
  console.log(`Keyboard mouse crossing event: ${JSON.stringify(networkId)}`);
  return false;
}
function callbackOff() {
  console.log(`Keyboard mouse crossing event`);
  return false;
}
try {
  cooperate.on('cooperate', callbackOn);
  cooperate.off('cooperate', callbackOff);
} catch (error) {
  console.log(`Execute failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

// Unregister all callbacks.
function callbackOn(networkId: string, msg: cooperate.CooperateMsg) {
  console.log(`Keyboard mouse crossing event: ${JSON.stringify(networkId)}`);
  return false;
}
try {
  cooperate.on('cooperate', callbackOn);
  cooperate.off('cooperate');
} catch (error) {
  console.log(`Execute failed, error: ${JSON.stringify(error, [`code`, `message`])}`);
}

CooperateMsg

Represents a screen hopping message notification.

System capability: SystemCapability.Msdp.DeviceStatus.Cooperate

Name	Value	Description
COOPERATE_PREPARE	0	The preparation for screen hopping is finished.
COOPERATE_UNPREPARE	1	The preparation for screen hopping is cancelled.
COOPERATE_ACTIVATE	2	Screen hopping starts.
COOPERATE_ACTIVATE_SUCCESS	3	Starting screen hopping succeeds.
COOPERATE_ACTIVATE_FAIL	4	Starting screen hopping fails.
COOPERATE_DEACTIVATE_SUCCESS	5	Stopping screen hopping succeeds.
COOPERATE_DEACTIVATE_FAIL	6	Stopping screen hopping fails.
COOPERATE_SESSION_DISCONNECTED	7	The screen hopping session is disconnected.