Runninglock锁

说明： 本模块首批接口从API version 7开始支持。后续版本的新增接口，采用上角标单独标记接口的起始版本。

该模块主要提供Runninglock锁相关操作的接口，包括创建、查询、持锁、释放锁等操作。

导入模块

import runningLock from '@ohos.runningLock';

RunningLockType

RunningLock锁的类型。

系统能力： 以下各项对应的系统能力均为SystemCapability.PowerManager.PowerManager.Core

isRunningLockTypeSupported

isRunningLockTypeSupported(type: RunningLockType, callback: AsyncCallback<boolean>): void

查询系统是否支持该类型的锁。

系统能力： SystemCapability.PowerManager.PowerManager.Core

参数：

示例：

runningLock.isRunningLockTypeSupported(runningLock.RunningLockType.BACKGROUND, (error, supported) => {
    if (typeof error === "undefined") {
        console.info('BACKGROUND support status is ' + supported);
    } else {
        console.log('error: ' + error);
    }
})

isRunningLockTypeSupported

isRunningLockTypeSupported(type: RunningLockType): Promise<boolean>

查询系统是否支持该类型的锁。

系统能力： SystemCapability.PowerManager.PowerManager.Core

参数：

返回值：

示例：

runningLock.isRunningLockTypeSupported(runningLock.RunningLockType.PROXIMITY_SCREEN_CONTROL)
.then(supported => {
    console.info('PROXIMITY_SCREEN_CONTROL support status is ' + supported);
})
.catch(error => {
    console.log('error: ' + error);
});

createRunningLock

createRunningLock(name: string, type: RunningLockType, callback: AsyncCallback<RunningLock>): void

创建RunningLock锁。

系统能力： SystemCapability.PowerManager.PowerManager.Core

需要权限： ohos.permission.RUNNING_LOCK

参数：

示例：

runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND, (error, lockIns) => {
    if (typeof error === "undefined") {
        console.log('create runningLock test error: ' + error);
    } else {
        var used = lockIns.isUsed();
        console.info('runninglock is used: ' + used);
        lockIns.lock(500);
        used = lockIns.isUsed();
        console.info('after lock runninglock is used ' + used);
    }
})

createRunningLock

createRunningLock(name: string, type: RunningLockType): Promise<RunningLock>

创建Runninglock锁。

系统能力： SystemCapability.PowerManager.PowerManager.Core

需要权限： ohos.permission.RUNNING_LOCK

参数：

返回值：

示例：

runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND)
.then(runninglock => {
    console.info('create runningLock success');
})
.catch(error => {
    console.log('create runningLock test error: ' + error);
})

RunningLock

阻止系统休眠的锁。

lock

lock(timeout: number): void

锁定和持有RunningLock。

系统能力： SystemCapability.PowerManager.PowerManager.Core

需要权限： ohos.permission.RUNNING_LOCK

参数：

示例：

runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND)
.then(runningLock => {
    runningLock.lock(100)
    console.info('create runningLock success')
})
.catch(error => {
    console.log('create runningLock test error: ' + error)
});

unlock

unlock(): void

释放Runninglock锁。

系统能力： SystemCapability.PowerManager.PowerManager.Core

需要权限： ohos.permission.RUNNING_LOCK

示例：

runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND)
.then(runningLock => {
    runningLock.unlock()
    console.info('create and unLock runningLock success')
})
.catch(error => {
    console.log('create runningLock test error: ' + error)
});

isUsed

isUsed(): boolean

查询当前Runninglock是持有状态还是释放状态。

系统能力： SystemCapability.PowerManager.PowerManager.Core

返回值：

示例：

runningLock.createRunningLock("running_lock_test", runningLock.RunningLockType.BACKGROUND)
.then(runningLock => {
    var used = runningLock.isUsed()
    console.info('runningLock used status: ' + used)
})
.catch(error => {
    console.log('runningLock isUsed test error: ' + error)
});