程序包 ohos.powermanager

类 PowerManager.RunningLock

java.lang.Object

ohos.powermanager.PowerManager.RunningLock

封闭类:

PowerManager

public final class PowerManager.RunningLock
extends Object

Provides a mechanism to prevent the system from hibernating so that the applications can run in the background or when the screen is off.

PowerManager#createRunningLock(String, RunningLockType) can be called to obtain a RunningLock.

lock(long) can be called to set the lock duration, during which the system will not hibernate. After the lock duration times out, the lock is automatically released and the system hibernates if no other RunningLock is set.

The following is an example of how to use RunningLock.

@Step1: Obtain the PowerManager object, create a global RunningLock object for it, and set the RunningLockType. If the RunningLock object is damaged, the lock duration will become invalid.

@Step2: Set a lock duration greater than 0 in milliseconds

 PowerManager powerManager = new PowerManager();
 PowerManager.RunningLock runningLock =
     powerManager.createRunningLock("test", PowerManager.RunningLockType.BACKGROUND);

 runningLock.lock(5000);
 

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方法概要

限定符和类型	方法	说明
boolean	isUsed()	Checks whether a lock is held or in use.
void	lock(long timeOutMs)	Prevents the system from hibernating and sets the lock duration.
void	unLock()	Release the RunningLock that prevents the system from hibernating.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

lock

public void lock(long timeOutMs)

Prevents the system from hibernating and sets the lock duration.

参数:

timeOutMs - Indicates the lock duration (ms). After the lock duration times out, the lock is automatically released and the system hibernates if no other RunningLock is set.

从以下版本开始:

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unLock

public void unLock()

Release the RunningLock that prevents the system from hibernating.

从以下版本开始:

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isUsed

public boolean isUsed()

Checks whether a lock is held or in use.

返回:

Returns true if the lock is held or in use; returns false if the lock has been released.

从以下版本开始:

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