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接口名

+

描述

+

function setTime(time : number) : Promise<boolean>

+

设置系统时间（1970-01-01至今毫秒数），Promise方式

+

function setTime(time : number, callback : AsyncCallback<boolean>) : void

+

设置系统时间（1970-01-01至今毫秒数），callback方式

+

function setDate(date: Date, callback: AsyncCallback<boolean>): void;

+

设置系统时间（Date格式），Promise方式

+

function setDate(date: Date): Promise<boolean>

+

设置系统时间（Date格式），callback方式

+

function setTimezone(timezone: string, callback: AsyncCallback<boolean>): void

+

设置系统时区，callback方式

+

function setTimezone(timezone: string): Promise<boolean>

+

设置系统时区，Promise方式

+
+ + +**表 2** js组件systemTimer开放的主要方法 + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

接口名

+

描述

+

function createTimer(options: TimerOptions, callback: AsyncCallback<number>): void

+

创建定时器，callback方式

+

function createTimer(options: TimerOptions): Promise<number>

+

创建定时器，promise方式

+

function startTimer(timer: number, triggerTime: number, callback: AsyncCallback<boolean>): void

+

开启定时器，callback方式

+

function startTimer(timer: number, triggerTime: number): Promise<boolean>

+

开启定时器，promise方式

+

function stopTimer(timer: number, callback: AsyncCallback<boolean>): void

+

停止定时器，callback方式

+

function stopTimer(timer: number): Promise<boolean>

+

停止定时器，promise方式

+

function destroyTimer(timer: number, callback: AsyncCallback<boolean>): void

+

销毁定时器，callback方式

+

function destroyTimer(timer: number): Promise<boolean>

+

摧毁定时器，promise方式

+
+ +**表 3** systemTimer组件参数TimerOptions说明 + + + + + + + + + + + + + + + + + + + + + + + + + + + + +

名称

+

类型

+

说明

+

type

+

number

+

TIMER_TYPE_REALTIME: 设置为系统启动时间定时器，否则为walltime定时器; + TIMER_TYPE_WAKEUP: 设置为唤醒定时器，否则为非唤醒; + const TIMER_TYPE_EXACT: 设置为精准定时器，否则为非精准定时器; + const TIMER_TYPE_IDLE: 设置为IDLE模式定时器，否则为非IDLE模式定时器（暂不支持） +

+

repeat

+

boolean

+

true 为循环定时器，false为单次定时器

+

interval

+

number

+

如果是循环定时器，repeat值应大于5000毫秒，非重复定时器置为0

+

wantAgent

+

wantAgent

+

设置通知的wantagent，定时器到期后通知

+

callback

+

=> void

+

设置回调函数，定时器到期后触发

+
+### js接口使用说明 + +systemTime模块使用示例： + +``` +// 导入模块 +import systemTime from '@ohos.systemTime'; + +// Promise方式的异步方法设置时间 +var time = 1611081385000; +systemTime.setTime(time) + .then((value) => { + console.log(`success to systemTime.setTime: ${value}`); + }).catch((err) => { + console.error(`failed to systemTime.setTime because ${err.message}`) + }); + + +// callback方式的异步方法设置时间 + +var time = 1611081385000; +systemTime.setTime(time, (err, value) => { + if (err) { + console.error(`failed to systemTime.setTime because ${err.message}`); + return; + } + console.log(`success to systemTime.setTime: ${value}`); + }); + +``` + +systemTimer模块使用示例： + +``` +// 导入模块 +import systemTimer from '@ohos.systemTimer'; + +console.log("start") +var options:TimerOptions{ + type:TIMER_TYPE_REALTIME, + repeat:false, + interval:Number.MAX_VALUE/2, + persistent:false +} + +console.log("create timer") +let timerId = systemTimer.Timer(options) +console.log("start timer") +let startTimerRes = systemTimer.startTimer(timerId, 100000) +console.log("stop timer") +let stopTimerRes = systemTimer.stopTimer(timerId) +console.log("destroy timer") +let destroyTimerRes = systemTimer.destroyTimer(timerId) +console.log('end'); + + +``` + +## 相关仓 + +**Misc软件服务子系统** + +miscservices\_time + -- GitLab