harmony 鸿蒙@system.network (Network State)

  • 2022-08-09
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@system.network (Network State)

NOTE - The initial APIs of this module are supported since API version 3. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import network from '@system.network';

Required Permissions

ohos.permission.GET_WIFI_INFO

ohos.permission.GET_NETWORK_INFO

network.getType3+

getType(options?: {
  success?: (data: NetworkResponse) => void;
  fail?: (data: any, code: number) => void;
  complete?: () => void;
}): void

Obtains the network type.

System capability: SystemCapability.Communication.NetManager.Core

Parameters

Name Type Mandatory Description
success Function No Called when the API call is successful. The return value is defined by NetworkResponse.
fail Function No Called when API call has failed.
complete Function No Called when the API call is complete.

One of the following error codes will be returned if the API call has failed.

Error Code Description
602 The current permission is not declared.

Example

export default {    
  getType() {        
    network.getType({            
      success: function(data) {                
        console.log('success get network type:' + data.type);            
      },            
      fail: function(data, code) {                
        console.log('fail to get network type code:' + code + ', data:' + data);            
      },
    });    
  },
}

network.subscribe3+

subscribe(options?:{
  success?: (data: NetworkResponse) => void;
  fail?: (data: any, code: number) => void;
}): void

Listens to the network connection state. If this method is called multiple times, the last call takes effect.

System capability: SystemCapability.Communication.NetManager.Core

Parameters

Name Type Mandatory Description
success Function No Called when the network state changes. The return value is defined by NetworkResponse.
fail Function No Called when API call has failed.

One of the following error codes will be returned if the API call has failed.

Error Code Description
602 The current permission is not declared.
200 Subscription failed.

Example

export default {    
  subscribe() {        
    network.subscribe({            
      success: function(data) {                
        console.log('network type change type:' + data.type);            
      },            
      fail: function(data, code) {                
        console.log('fail to subscribe network, code:' + code + ', data:' + data);            
      },
    });    
  },
}

network.unsubscribe3+

unsubscribe(): void

Cancels listening to the network connection state.

System capability: SystemCapability.Communication.NetManager.Core

Example

export default {    
  unsubscribe() {        
    network.unsubscribe();    
  },
}

NetworkResponse3+

System capability: SystemCapability.Communication.NetManager.Core

Name Type Mandatory Description
metered boolean No Whether to charge by traffic.
type string Yes Network type. The value can be 2G, 3G, 4G, 5G, WiFi, or none.

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