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update zh-cn/application-dev/work-scheduler/work-scheduler-dev-guide.md.

Signed-off-by: NLiAn <lian15@huawei.com>
上级 54302aeb
# 延迟任务调度开发指导
## 场景介绍
应用要执行对实时性要求不高的任务的时候,比如设备空闲时候做一次数据学习等场景,可以使用延迟调度任务,该机制在满足应用设定条件的时候,会根据系统当前状态,如内存、功耗、热等统一决策调度时间。
## 接口说明
注册相关接口包导入:
```js
import workScheduler from '@ohos.workScheduler';
```
回调相关接口包导入:
```js
import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility';
```
### 延迟任务调度
**表1** workScheduler主要接口
接口名 | 接口描述
---------------------------------------------------------|-----------------------------------------
function startWork(work: WorkInfo): boolean; | 延迟调度任务申请
function stopWork(work: WorkInfo, needCancel?: boolean): boolean; | 延迟调度任务取消
function getWorkStatus(workId: number, callback: AsyncCallback<WorkInfo>): void;| 获取延迟调度任务状态(Callback形式)
function getWorkStatus(workId: number): Promise<WorkInfo>; | 获取延迟调度任务状态(Promise形式)
function obtainAllWorks(callback: AsyncCallback<void>): Array<WorkInfo>;| 获取所有延迟调度任务(Callback形式)
function obtainAllWorks(): Promise<Array<WorkInfo>>;| 获取所有延迟调度任务(Promise形式)
function stopAndClearWorks(): boolean;| 停止并清除任务
function isLastWorkTimeOut(workId: number, callback: AsyncCallback<void>): boolean;| 获取上次任务是否超时(针对RepeatWork,Callback形式)
function isLastWorkTimeOut(workId: number): Promise<boolean>;| 获取上次任务是否超时(针对RepeatWork,Promise形式)
**表2** WorkInfo包含参数
接口名|描述|类型
---------------------------------------------------------|-----------------------------------------|---------------------------------------------------------
workId | 延迟任务Id(必填)|number
bundleName | 延迟任务包名(必填)|string
abilityName | 延迟任务回调通知的组件名(必填)|string
networkType | 网络条件 | NetworkType
isCharging | 是否充电 | bool
chargerType | 充电类型 | ChargingType
batteryLevel | 电量| number
batteryStatus| 电池状态| BatteryStatus
storageRequest|存储状态| StorageRequest
isRepeat|是否循环任务| boolean
repeatCycleTime |循环间隔| number
repeatCount |循环次数| number
**表3** 延迟任务回调接口
接口名 | 接口描述
---------------------------------------------------------|-----------------------------------------
function onWorkStart(work: WorkInfo): void; | 延迟调度任务开始回调
function onWorkStop(work: WorkInfo): void; | 延迟调度任务结束回调
### 开发步骤
**开发对应的Extension**
import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility';
export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
onWorkStart(workInfo) {
console.log('MyWorkSchedulerExtensionAbility onWorkStart' + JSON.stringify(workInfo));
}
onWorkStop(workInfo) {
console.log('MyWorkSchedulerExtensionAbility onWorkStop' + JSON.stringify(workInfo));
}
}
# 延迟任务调度开发指导
## 场景介绍
应用要执行对实时性要求不高的任务的时候,比如设备空闲时候做一次数据学习等场景,可以使用延迟调度任务,该机制在满足应用设定条件的时候,会根据系统当前状态,如内存、功耗、热等统一决策调度时间。
## 接口说明
注册相关接口包导入:
```js
import workScheduler from '@ohos.workScheduler';
```
回调相关接口包导入:
```js
import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility';
```
### 延迟任务调度
**表1** workScheduler主要接口
接口名 | 接口描述
---------------------------------------------------------|-----------------------------------------
function startWork(work: WorkInfo): boolean; | 延迟调度任务申请
function stopWork(work: WorkInfo, needCancel?: boolean): boolean; | 延迟调度任务取消
function getWorkStatus(workId: number, callback: AsyncCallback<WorkInfo>): void;| 获取延迟调度任务状态(Callback形式)
function getWorkStatus(workId: number): Promise<WorkInfo>; | 获取延迟调度任务状态(Promise形式)
function obtainAllWorks(callback: AsyncCallback<void>): Array<WorkInfo>;| 获取所有延迟调度任务(Callback形式)
function obtainAllWorks(): Promise<Array<WorkInfo>>;| 获取所有延迟调度任务(Promise形式)
function stopAndClearWorks(): boolean;| 停止并清除任务
function isLastWorkTimeOut(workId: number, callback: AsyncCallback<void>): boolean;| 获取上次任务是否超时(针对RepeatWork,Callback形式)
function isLastWorkTimeOut(workId: number): Promise<boolean>;| 获取上次任务是否超时(针对RepeatWork,Promise形式)
**表2** WorkInfo包含参数
接口名|描述|类型
---------------------------------------------------------|-----------------------------------------|---------------------------------------------------------
workId | 延迟任务Id(必填)|number
bundleName | 延迟任务包名(必填)|string
abilityName | 延迟任务回调通知的组件名(必填)|string
networkType | 网络类型 | NetworkType
isCharging | 是否充电 | boolean
chargerType | 充电类型 | ChargingType
batteryLevel | 电量| number
batteryStatus| 电池状态| BatteryStatus
storageRequest|存储状态| StorageRequest
isRepeat|是否循环任务| boolean
repeatCycleTime |循环间隔| number
repeatCount |循环次数| number
**表3** 延迟任务回调接口
接口名 | 接口描述
---------------------------------------------------------|-----------------------------------------
function onWorkStart(work: WorkInfo): void; | 延迟调度任务开始回调
function onWorkStop(work: WorkInfo): void; | 延迟调度任务结束回调
### 开发步骤
**开发对应的Extension**
import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility';
export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
onWorkStart(workInfo) {
console.log('MyWorkSchedulerExtensionAbility onWorkStart' + JSON.stringify(workInfo));
}
onWorkStop(workInfo) {
console.log('MyWorkSchedulerExtensionAbility onWorkStop' + JSON.stringify(workInfo));
}
}
**注册延迟任务**
import workScheduler from '@ohos.workScheduler';
let workInfo = {
workId: 1,
batteryLevel:50,
batteryStatus:workScheduler.BatteryStatus.BATTERY_STATUS_LOW,
isRepeat: false,
isPersisted: true,
bundleName: "com.example.myapplication",
abilityName: "MyExtension"
}
var res = workScheduler.startWork(workInfo);
console.info("workschedulerLog res:" + res);
**取消延迟任务**
import workScheduler from '@ohos.workScheduler';
let workInfo = {
workId: 1,
batteryLevel:50,
batteryStatus:workScheduler.BatteryStatus.BATTERY_STATUS_LOW,
isRepeat: false,
isPersisted: true,
bundleName: "com.example.myapplication",
abilityName: "MyExtension"
}
var res = workScheduler.stopWork(workInfo, false);
console.info("workschedulerLog res:" + res);
**获取指定延迟任务**
1.Callback写法
workScheduler.getWorkStatus(50, (err, res) => {
if (err) {
console.info('workschedulerLog getWorkStatus failed, because:' + err.data);
} else {
for (let item in res) {
console.info('workschedulerLog getWorkStatuscallback success,' + item + ' is:' + res[item]);
}
}
});
2.Promise写法
workScheduler.getWorkStatus(50).then((res) => {
for (let item in res) {
console.info('workschedulerLog getWorkStatus success,' + item + ' is:' + res[item]);
}
}).catch((err) => {
console.info('workschedulerLog getWorkStatus failed, because:' + err.data);
})
**获取所有延迟任务**
1.Callback写法
workScheduler.obtainAllWorks((err, res) =>{
if (err) {
console.info('workschedulerLog obtainAllWorks failed, because:' + err.data);
} else {
console.info('workschedulerLog obtainAllWorks success, data is:' + JSON.stringify(res));
}
});
2.Promise写法
workScheduler.obtainAllWorks().then((res) => {
console.info('workschedulerLog obtainAllWorks success, data is:' + JSON.stringify(res));
}).catch((err) => {
console.info('workschedulerLog obtainAllWorks failed, because:' + err.data);
})
**停止并清除任务**
let res = workScheduler.stopAndClearWorks();
console.info("workschedulerLog res:" + res);
**判断上次执行是否超时**
1.Callback写法
workScheduler.isLastWorkTimeOut(500, (err, res) =>{
if (err) {
console.info('workschedulerLog isLastWorkTimeOut failed, because:' + err.data);
} else {
console.info('workschedulerLog isLastWorkTimeOut success, data is:' + res);
}
});
2.Promise写法
workScheduler.isLastWorkTimeOut(500)
.then(res => {
console.info('workschedulerLog isLastWorkTimeOut success, data is:' + res);
})
.catch(err => {
console.info('workschedulerLog isLastWorkTimeOut failed, because:' + err.data);
});
import workScheduler from '@ohos.workScheduler';
let workInfo = {
workId: 1,
batteryLevel:50,
batteryStatus:workScheduler.BatteryStatus.BATTERY_STATUS_LOW,
isRepeat: false,
isPersisted: true,
bundleName: "com.example.myapplication",
abilityName: "MyExtension"
}
var res = workScheduler.startWork(workInfo);
console.info("workschedulerLog res:" + res);
**取消延迟任务**
import workScheduler from '@ohos.workScheduler';
let workInfo = {
workId: 1,
batteryLevel:50,
batteryStatus:workScheduler.BatteryStatus.BATTERY_STATUS_LOW,
isRepeat: false,
isPersisted: true,
bundleName: "com.example.myapplication",
abilityName: "MyExtension"
}
var res = workScheduler.stopWork(workInfo, false);
console.info("workschedulerLog res:" + res);
**获取指定延迟任务**
1.Callback写法
workScheduler.getWorkStatus(50, (err, res) => {
if (err) {
console.info('workschedulerLog getWorkStatus failed, because:' + err.data);
} else {
for (let item in res) {
console.info('workschedulerLog getWorkStatuscallback success,' + item + ' is:' + res[item]);
}
}
});
2.Promise写法
workScheduler.getWorkStatus(50).then((res) => {
for (let item in res) {
console.info('workschedulerLog getWorkStatus success,' + item + ' is:' + res[item]);
}
}).catch((err) => {
console.info('workschedulerLog getWorkStatus failed, because:' + err.data);
})
**获取所有延迟任务**
1.Callback写法
workScheduler.obtainAllWorks((err, res) =>{
if (err) {
console.info('workschedulerLog obtainAllWorks failed, because:' + err.data);
} else {
console.info('workschedulerLog obtainAllWorks success, data is:' + JSON.stringify(res));
}
});
2.Promise写法
workScheduler.obtainAllWorks().then((res) => {
console.info('workschedulerLog obtainAllWorks success, data is:' + JSON.stringify(res));
}).catch((err) => {
console.info('workschedulerLog obtainAllWorks failed, because:' + err.data);
})
**停止并清除任务**
let res = workScheduler.stopAndClearWorks();
console.info("workschedulerLog res:" + res);
**判断上次执行是否超时**
1.Callback写法
workScheduler.isLastWorkTimeOut(500, (err, res) =>{
if (err) {
console.info('workschedulerLog isLastWorkTimeOut failed, because:' + err.data);
} else {
console.info('workschedulerLog isLastWorkTimeOut success, data is:' + res);
}
});
2.Promise写法
workScheduler.isLastWorkTimeOut(500)
.then(res => {
console.info('workschedulerLog isLastWorkTimeOut success, data is:' + res);
})
.catch(err => {
console.info('workschedulerLog isLastWorkTimeOut failed, because:' + err.data);
});
})
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