VoIP Call Manager not available in wearable devices: Configure syscap.json

#harmonyos #wearabledevelopment #voipcall #systemcapability

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Context

When using the voipCall module from @kit.CallServiceKit on wearable devices, the system does not include SystemCapability.Telephony.VoipCallManager by default. If a syscap.json file is not configured, this leads to a build-time error indicating the missing capability.

Description

When the following import is used in a wearable project:

import { voipCall } from '@kit.CallServiceKit';

The build process throws the following error:

The default system capabilities of devices wearable do not include SystemCapability.Telephony.VoipCallManager. Configure the capabilities in syscap.json. <ArkTSCheck>

This occurs because wearable devices do not enable the VoIP Call Manager capability by default.

Solution / Approach

To resolve this issue, create a syscap.json file under the main directory of the project and add the following configuration:

{
  "devices": {
    "general": [
      "wearable"
    ]
  },
  "development": {
    "addedSysCaps": [
      "SystemCapability.Telephony.VoipCallManager"
    ]
  }
}

This configuration explicitly enables the SystemCapability.Telephony.VoipCallManager capability for wearable devices.

Key Takeaways

Wearable devices do not support SystemCapability.Telephony.VoipCallManager by default.
Using voipCall requires explicitly declaring this capability in syscap.json.
The syscap.json file must be placed under the main directory of the project.