# 创建ServiceAbility 1. 创建ServiceAbility。 重写ServiceAbility的生命周期方法,添加其他Ability请求与ServiceAbility交互时的处理方法。 ```ts import rpc from "@ohos.rpc" class FirstServiceAbilityStub extends rpc.RemoteObject { constructor(des: any) { if (typeof des === 'string') { super(des) } else { return } } } export default { onStart() { console.info('ServiceAbility onStart') }, onStop() { console.info('ServiceAbility onStop') }, onCommand(want, startId) { console.info('ServiceAbility onCommand') }, onConnect(want) { console.info('ServiceAbility onConnect' + want) return new FirstServiceAbilityStub('test') }, onDisconnect(want) { console.info('ServiceAbility onDisconnect' + want) } } ``` 2. 注册ServiceAbility。 ServiceAbility需要在应用配置文件config.json中进行注册,注册类型type需要设置为service。"visible"属性表示ServiceAbility是否可以被其他应用调用,true表示可以被其他应用调用,false表示不能被其他应用调用(仅应用内可以调用)。若ServiceAbility需要被其他应用调用,注册ServiceAbility时需要设置"visible"为true,同时需要设置支持关联启动。ServiceAbility的启动规则详见[组件启动规则](component-startup-rules.md)章节。 ```json { "module": { "abilities": [ { "name": ".ServiceAbility", "srcLanguage": "ets", "srcPath": "ServiceAbility", "icon": "$media:icon", "description": "hap sample empty service", "type": "service", "visible": true } ] } } ```