harmony 鸿蒙@ohos.app.ability.ChildProcess

2025-06-12
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@ohos.app.ability.ChildProcess

ChildProcess is the base class for you to customize child processes. When starting a child process through childProcessManager, you must inherit this class and override the entrypoint method.

NOTE

The initial APIs of this module are supported since API version 11. 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.

Modules to Import

import { ChildProcess } from '@kit.AbilityKit';

ChildProcess.onStart

onStart(args?: ChildProcessArgs): void

Entrypoint method of the child process. This callback is triggered when the child process is started through childProcessManager.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Name	Type	Mandatory	Description
args¹²⁺	ChildProcessArgs	No	Parameters transferred to the child process.

Example

import { ChildProcess, ChildProcessArgs } from '@kit.AbilityKit';

export default class DemoProcess extends ChildProcess {

  onStart(args?: ChildProcessArgs) {
    let entryParams = args?.entryParams;
    let fd = args?.fds?.key1;
    // ..
  }
}