创建ServiceAbility
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创建ServiceAbility。
通过DevEco Studio开发平台创建ServiceAbility时,DevEco Studio会默认生成onStart、onStop、onCommand方法,其他方法需要开发者自行实现,接口说明参见前述章节。开发者也可以添加其他Ability请求与ServiceAbility交互时的处理方法,示例如下:
import type Want from '@ohos.app.ability.Want'; import rpc from '@ohos.rpc'; import hilog from '@ohos.hilog'; const TAG: string = '[Sample_FAModelAbilityDevelop]'; const domain: number = 0xFF00; class FirstServiceAbilityStub extends rpc.RemoteObject { constructor(des: Object) { if (typeof des === 'string') { super(des); } else { return; } } onRemoteRequest(code: number, data: rpc.MessageParcel, reply: rpc.MessageParcel, option: rpc.MessageOption): boolean { hilog.info(domain, TAG, 'ServiceAbility onRemoteRequest called'); if (code === 1) { let string = data.readString(); hilog.info(domain, TAG, `ServiceAbility string=${string}`); let result = Array.from(string).sort().join(''); hilog.info(domain, TAG, `ServiceAbility result=${result}`); reply.writeString(result); } else { hilog.info(domain, TAG, 'ServiceAbility unknown request code'); } return true; } } class ServiceAbility { onStart(): void { hilog.info(domain, TAG, 'ServiceAbility onStart'); } onStop(): void { hilog.info(domain, TAG, 'ServiceAbility onStop'); } onCommand(want: Want, startId: number): void { hilog.info(domain, TAG, 'ServiceAbility onCommand'); } onConnect(want: Want): rpc.RemoteObject { hilog.info(domain, TAG, 'ServiceAbility onDisconnect' + want); return new FirstServiceAbilityStub('test'); } onDisconnect(want: Want): void { hilog.info(domain, TAG, 'ServiceAbility onDisconnect' + want); } } export default new ServiceAbility();
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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章节。
{ ... "module": { ... "abilities": [ ... { "name": ".ServiceAbility", "srcLanguage": "ets", "srcPath": "ServiceAbility", "icon": "$media:icon", "description": "$string:ServiceAbility_desc", "type": "service", "visible": true }, ... ] ... } }