SystemClock.sleep和Thread.sleep的区别

schths2022-10-04 11:39:541条回答

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ArlenZhao 共回答了21个问题 | 采纳率95.2%
在Java中我们处理线程同步问题时,处理延迟可能会使用Thread类的sleep方法,这里抛开concurrent类的一些方法,其实 Android平台还提供了一个SystemClock.sleep方法,它们有什么区别呢?
我们每次调用Thread.sleep时可能会出现InterruptedException异常,而SystemClock.sleep方法则不会,在 SDK上有这样的描述,它将会忽略中断异常.
Three different clocks are available, and they should not be confused:
System.currentTimeMillis() is the standard "wall" clock (time and date) expressing milliseconds since the epoch. The wall clock can be set by the user or the phone network (see setCurrentTimeMillis(long)), so the time may jump backwards or forwards unpredictably. This clock should only be used when correspondence with real-world dates and times is important, such as in a calendar or alarm clock application. Interval or elapsed time measurements should use a different clock. If you are using System.currentTimeMillis(), consider listening to the ACTION_TIME_TICK, ACTION_TIME_CHANGED and ACTION_TIMEZONE_CHANGED Intent broadcasts to find out when the time changes.
uptimeMillis() is counted in milliseconds since the system was booted. This clock stops when the system enters deep sleep (CPU off, display dark, device waiting for external input), but is not affected by clock scaling, idle, or other power saving mechanisms. This is the basis for most interval timing such as Thread.sleep(millls), Object.wait(millis), and System.nanoTime(). This clock is guaranteed to be monotonic, and is the recommended basis for the general purpose interval timing of user interface events, performance measurements, and anything else that does not need to measure elapsed time during device sleep. Most methods that accept a timestamp value expect the uptimeMillis() clock.
elapsedRealtime() is counted in milliseconds since the system was booted, including deep sleep. This clock should be used when measuring time intervals that may span periods of system sleep.
There are several mechanisms for controlling the timing of events:
Standard functions like Thread.sleep(millis) and Object.wait(millis) are always available. These functions use the uptimeMillis() clock; if the device enters sleep, the remainder of the time will be postponed until the device wakes up. These synchronous functions may be interrupted with Thread.interrupt(), and you must handle InterruptedException.
SystemClock.sleep(millis) is a utility function very similar to Thread.sleep(millis), but it ignores InterruptedException. Use this function for delays if you do not use Thread.interrupt(), as it will preserve the interrupted state of the thread.
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很显然是 介词to+关系代词which引导的定语从句,即使从翻译上也可以看出来----空气加热和冷却的程度
定语从句不容易直接表达出来,如果我把后面的定语从句用主动的形式表达出来你也许会明白,即 heat or cool the air to the extent 意思是把空气加热或冷却到一个程度 因为 里面有to 所以 变为定语从句的时候也不能省略而是放在关系代词which 的前面.这就跟 This is the house in which I lived ten years ago 一样 只不过这个是 in+which.
英语翻译discuss the impact of human use on the river system of t
英语翻译
discuss the impact of human use on the river system of the surrounding land.
是要说 ‘对于river system的影响’
还是要说 ‘对于沿岸的影响’?
就是说要讨论人类的使用对于沿岸的影响喽?
romantic251年前9
qq海角1234 共回答了18个问题 | 采纳率100%
前一个理解正确.
impact on...对…的影响
use of...对…的使用
翻译过来是:
讨论人对河流沿岸的使用对河流系统造成的影响
using system of receiving and senging information as a serie
using system of receiving and senging information as a series of the numbers one and zero 错在哪里
using system of receiving and sending information as a series of the numbers one and zero,showing that an electronic signal is there or is not there.
利用接收和发送的数字为1和0的信息,显示出电子信号存在或不存在系统.
这样翻感觉有点不对劲,错在哪里?请高手指出.
忧郁的小明1年前1
东冬儿 共回答了20个问题 | 采纳率90%
应用系统通过接受和发送一连串数值为一或零的数字信息,来表示系统有或者没有信号.
翻译:a trickling filter system;an activated sludge system
shuoshuo88481年前1
dengxile 共回答了18个问题 | 采纳率88.9%
滴滤系统 加菌淤泥系统
都是污水处理办法
英语翻译definition of accounting:accounting is a system that rec
英语翻译
definition of accounting:accounting is a system that records the action of business and from which reports can be prepare on the performance of the business.
alxier1年前1
294029446 共回答了14个问题 | 采纳率92.9%
会计定义:会计是一种记录商业经济行为并能够对公司经济运营状况作出预测的经营管理体系.
8.The education system rather than the teachers ___ to answe
8.The education system rather than the teachers ___ to answer for the overburden on the students.
--- I agree.I hope the reform being carried out in our country at present will bring about the ___ result.
A.are; desired B.is; desired C.are; desiring D.is; desiring
Please explain.the desiring result
and the deisired result
gaoping20181年前1
flytears2005 共回答了22个问题 | 采纳率86.4%
D
主语是The education system 应该用单数
后面这个就和 exciting & excited 一样 ing结构是指结果本身.ed是指被怎么样.
应该是结果本身desiring,
英语翻译Checking file system on E:The type of the file system is
英语翻译
Checking file system on E:
The type of the file system is FAT32.
One of your disks needs to be checked for consistency.You
may cancel the disk check,but it is strongly recommended
that you continue.
Windows will now check the disk.
Volume Serial Number is B85D-2D96
Windows has checked the file system and found no problems.
19999136 KB total disk space.
5712 KB in 26 hidden files.
29760 KB in 1784 folders.
5086688 KB in 39643 files.
14876960 KB are available.
16384 bytes in each allocation unit.
1249946 total allocation units on disk.
929810 allocation units available on disk.
Checking file system on E:
The type of the file system is FAT32.
One of your disks needs to be checked for consistency.You
may cancel the disk check,but it is strongly recommended
that you continue.
Windows will now check the disk.
Volume Serial Number is B85D-2D96
Windows has checked the file system and found no problems.
19999136 KB total disk space.
5712 KB in 26 hidden files.
29760 KB in 1784 folders.
5087904 KB in 39663 files.
14875744 KB are available.
16384 bytes in each allocation unit.
1249946 total allocation units on disk.
929734 allocation units available on disk.
xckoiasufopisaud1年前4
彩虹客服 共回答了16个问题 | 采纳率87.5%
晕,一个磁盘自检的结果而已,有必要翻译么,看到那句话了么,
Windows has checked the file system and found no problems.
windows已经检测了磁盘系统,没有发现问题.
安啦,别的就是你硬盘的一些状态没必要看的.废话都是
上面那个是google翻译的吧~
英语翻译Our System Administrators said that there currently isn'
英语翻译
Our System Administrators said that there currently isn't a load on the server and have re-enabled your account.Should you have any questions or concerns regarding this issue or any other issue,please feel free to contact us back and we will be more than happy to assist you further.
512513141年前4
PurpleXu 共回答了23个问题 | 采纳率82.6%
我们的系统管理员说目前在服务器上没有负载,并说已经重新启用了您的帐户.对这个问题,如果您有任何问题或疑虑,请随时联系我们回来,我们将非常乐意进一步帮助您.
The heating system here has an __________ temperature contro
The heating system here has an __________ temperature control.
[ ]
A. automobile
B. autonomy
C. autumn
D. automatic
l6p71年前1
眞我dē风采 共回答了13个问题 | 采纳率84.6%
D
System Error!Please kindly inform the customer service depar
System Error!Please kindly inform the customer service department.
翻译成中文啥意思啊!
hytfds1年前2
兰色孤影 共回答了21个问题 | 采纳率90.5%
系统错误 敬请您通知客服部
英语翻译1.Within the realnumber system,numbers of various kinds
英语翻译
1.Within the real
number system,numbers of various kinds are identified and named.The numbers
1,2,3,4,… which are used in the counting process,are called natural
numbers.The natural numbers,together with–1,-2,-3,-4,…and zero,are called
integers.Since 1,2,3,4,…are greater than 0,they are also called positive integers;
-1,-2,-3,-4,…are less than 0,and for this reason are called negative integers.
A real number is said to be a rational number if it can be expressed as the
ratio of two integers,where the denominator is not zero.The integers are
included among the rational numbers since any integer can be expressed as the
ratio of the integer itself and one.A real number that cannot be expressed as
the ratio of two integers is said to be an irrational number.
2.Graph theory is a
rapidly growing branch of mathematics.The graphs discussed in this chapter are
not the same as the graphs of functions that we studied previously,but a
totally different kind.Like many of the important discoveries and new areas of
learning,graph theory also grew out of an interesting physical problem,the
so-called Konigsberg bridge problem.(this problem is discussed in Section 2)
The outstanding Swiss mathematician,Leonhard Euler (1707-1783) solved the
problem in 1736,thus laying the foundation for this branch of mathematics.
Accordingly,Euler is called the father of graph theory.
3.The start of
operations research took place in a military context in the United Kingdom
during World War Ⅱ,and it was quickly taken up under the name operations
research (OR) in the United States.After the war it evolved in connection with
industrial organization,and its many techniques allowed for expanding areas of
application in the United States,the United Kingdom,and in other industrial
countries.It is,however,not easy to give a precise definition of operationsresearch,There are three different representative definitions.
秋色天使1年前1
jhw_521 共回答了18个问题 | 采纳率94.4%
1. 在实数系中,不同种类的数字得以确定和命名.在数数时所用到的1,2,3,4, … 等数字被称为自然数.自然数以及-1, -2, -3, -4 和0都被称为整数.由于1,2,3,4,…都大于0,这些数字也被称为正整数;-1,-2,-3,-4,…都小于0,因此这些数字被称为负整数.如果一个实数能用两个整数之比来表示(分母不能为0),那么这个实数就是有理数.整数包括在有理数之中,因为任何一个整数都可以表示为该整数自己与1之比.如果一个实数不能用两个整数之比来表示,则该实数就是无理数.
2. 图论是发展迅速的一个数学分支.本章所讨论的图形不同于我们之前所学过的函数图形,而是一种全新的图形.就如同很多学问的重要发现和新领域一样,图论也出自一个有趣的物理问题,即所谓的哥尼斯堡桥问题(该问题在2小节予以讨论).杰出的瑞士数学家莱昂哈德*欧拉(1707-1783)于1736年解决了这个问题,并因此而为数学的这个分支奠定了基础.因此,欧拉被称为图论之父.
3. 运筹学出现在二战时期英国的战争背景下,并很快被美国以运筹学的名义开始进行研究.二战结束以后,运筹学与行业组织共同发展,并且运筹学的很多技术使得美国的应用领域得以拓宽.但是,要对运筹学给出一个准确的定义却并非易事.具有代表性的有三个不同定义.
Passage 1The American economic system is organized around a
Passage 1
The American economic system is organized around a basically private-enterprise,market-oriented economy in which consumers largely determine what shall be produced by spending their money in the marketplace for those goods and services that they want most.Private businessmen,striving to make profits,produce these goods and services in competition with other businessmen; and the profit motive,operating under competitive pressures,largely determines how these goods and services are produced.Thus,in the American economic system it is the demand of individual consumers,coupled with the desire of businessmen to maximize profits and the desire of individuals to maximize their incomes,that together determine what shall be produced and how resources are used to produce it.
An important factor in a market-oriented economy is the mechanism by which consumer demands can be expressed and responded to by producers.In the American economy,this mechanism is provided by a price system,a process in which prices rise and fall in response to relative demands of consumers and supplies offered by seller-producers.If the product is in short supply relative to the demand,the price will be bid up and some consumers will be eliminated from the market.If,on the other hand,producing more of a commodity results in reducing its cost,this will tend to increase the supply offered by seller-producers,which in turn will lower the price and permit more consumers to buy the product.Thus,price is the regulating mechanism in the American economic system.
The important factor in a private-enterprise economy is that individuals are allowed to own productive resources(private property),and they are permitted to hire labor,gain control over natural resources,and produce goods and services for sale at a profit.In the American economy,the concept of private property embraces not only the ownership of productive resources but also certain rights,including the right to determine the price of a product or to make a free contract with another private individual.
1.In Line 7,Para.1,“the desire of individuals to maximize their incomes” means .
〔A〕 Americans are never satisfied with their incomes
〔B〕 Americans tend to overstate their incomes
〔C〕 Americans want to have their incomes increased
〔D〕 Americans want to increase the purchasing power of their incomes
2.The first two sentences in the second paragraph tell us that .
〔A〕 producers can satisfy the consumers by mechanized production
〔B〕 consumers can express their demands through producers
〔C〕 producers decide the prices of products
〔D〕 supply and demand regulate prices
jinsen997781年前1
游兵散勇 共回答了22个问题 | 采纳率81.8%
D D
英语翻译In a service system,economic entities lie along a contin
英语翻译
In a service system,economic entities lie along a continuum from self-sufficient interactions with the environment to highly specialized production-consumption relationships with others (Hawley,1986; Seabright,2004; Prahalad and Ramaswamy 2004).Improving the productivity of interactions (Butler and Sahay,1997; McAfee,2004) and labor productivity (Lewis,2004; Patterson,2001; Gilbert,1978) are key targets of service innovation,including innovation in measuring productivity (Bosworth and Triplett,2003; Brynjolfsson and Hitt,2000).
zanny1年前1
1A多少钱啊 共回答了23个问题 | 采纳率87%
在服务系统、经济实体搁在连续从自给自足的互动环境,高度专业化的生产-消费和他人的关系Hawley,1986分;Seabright,2004分;Prahalad和Ramaswamy 2004.提高生产力的相互作用巴特勒与Sahay,1997分;McAfee,2004和劳动生产率刘易斯,2004分;,2001分;吉尔伯特,帕特森1978是重要的目标服务创新,包括创新在测量生产力和Triplett·博斯沃斯那样,2003分;Brynjolfsson和Hitt,2000.亲那 肯定对
英译中!When using our proposed model in a system level simulati
英译中!
When using our proposed model in a system level simulation,the link level model can then adjust the post-equalization symbol SINR to account for the effect of H-ARQ by means of a simple sum,as shown in Eq.(3),where i denotes the i-th retransmission.
wzt1181年前1
冲你去 共回答了13个问题 | 采纳率92.3%
把这个提议的模型(数学方程组) 用于模拟整个系统时,就如公式(3)所演示的那样,连接层的模型可以利用简单的加法调整均衡后符号SINR(信扰噪比)来计入H-ARQ(对系统)所带来的影响.式子中的i代表第i个再传送.
请问:outCase[i].pOut[0]=0;min=getSmall(in);HINE,"SYSTEM\\Curr
请问:outCase[i].pOut[0]=0;min=getSmall(in);HINE,"SYSTEM\Curr
0);for(i=0;i
赚分王921年前1
wh_d 共回答了19个问题 | 采纳率100%
0);0],c[100],d,t;printf("Inputn:n");比较for(i=0;i
英语翻译A hydraulic system is produced when the various conponen
英语翻译
A hydraulic system is produced when the various conponents such as reservoir,pump,valve,and motor are combined and joined together whith the necessary pipe,tubing,and fittings.The hydraulic system illustrated in Fig.2-6 is quite simple;however,when it becomes necessary vary speeds,motions,etc.,in a fixed or variable sequence,the complexity of the system.The mosr complex system still contains the basic vcomponents found on a simple system.Two types of hydraulic system.Two typs of hydraulic systems,the constant volume and the variable volume,are generally used.
fuyy3121年前1
爱斯特拉冈 共回答了14个问题 | 采纳率78.6%
液压系统是由储液缸,油泵,阀门以及电机等各种部件再加上合适的管道装置组成的.如图2-6中的系统就是一个简单的液压系统;尽管如此,在需要以确定或是变化的次序改变速度及运动这些参数的时候,就要用到复杂点的液压系统...
此句句子成分分析,The city was even equipped with a drainage system,f
此句句子成分分析,
The city was even equipped with a drainage system,for a great many clay pipes were found beneath the narrow streets.
janegao9991年前2
ibibo 共回答了21个问题 | 采纳率90.5%
The city was even equipped with a drainage system,主句
The city 主语
was equipped with 谓语
even 副词,作状语,起强调作用
a drainage system 做介词的宾语
for a great many clay pipes were found beneath the narrow streets.从句部分 原因状语从句
for 从属连词,用来引导从句的
a great many 定语=many
clay pipes 主语
were 谓语
found beneath the narrow streets 这个叫主语补足语
supports a healthy immune system是什么意思
chuangsi1年前1
i0bc0 共回答了30个问题 | 采纳率90%
支持健康的免疫系统
The system of Braille is really _____________ to the blind.
The system of Braille is really _____________ to the blind.
A.of great useful B.great useful C.great use D.of great use
hi_sky1年前1
tigerlove 共回答了17个问题 | 采纳率88.2%
D

英语翻译perfect the law system 怎么看都觉得太二了 求地道的英语表达
不在是从前1年前4
文峰西路 共回答了16个问题 | 采纳率81.3%
to improve the legal system
— Tom, I made your computer system break down. I will pay so
— Tom, I made your computer system break down. I will pay someone to repair it.
— Oh. ______. I can solve it by myself.
A.Forget it B.Take it easy C.No way D.Don’t say so.
牵着鼠标来散步1年前1
yvonne_yi 共回答了14个问题 | 采纳率92.9%
A

英语翻译underground system ,kilometers ,traffic jams ,get topubl
英语翻译
underground system ,kilometers ,traffic jams ,get to
public transport ,rush hour ,getting around
In this beautiful city of 8 million people,__________is very easy-it's a piece of cake Your can take every type of __________you can think of.There is a monorail and even a cable car.For people on the move,the bus system,and the__________help to stop__________so people can get to work on time.
During__________ in the morning and evening,the roads are very busy.
It takes no time at all to __________school or to work.The distances are quiet short,not more than a few__________.
Sydeney is really a great city and it is very easy to get around.The whole world is here.Come and visit soon.
宝得可爱1年前3
Lin_Y 共回答了17个问题 | 采纳率88.2%
getting around
public transport
underground system
traffic jams
rush hour
get to
kilometers
在一个拥有八百万人口的美丽城市,出行是一件很容易,轻松的事.你可以乘坐任何一种你能想到的交通工具.这里有 单轨,甚至是缆车.对于四处奔波的人们来说,汽车和地下交通系统帮助阻止了交通拥挤,以便人们可以准时去上班.在早上和晚上,上下班高峰时间,道路总是很拥挤.去上学或上班,一点也不花时间,距离很短,不超过几千米.悉尼真是一个了不起的城市,它很容易四处走动.整个世界都在这里.欢迎你们参观.
什么情况下英式英语中读| i |的音,读美式时需读| ∂ |音,比如system,英式为|'sistim|,
什么情况下英式英语中读| i |的音,读美式时需读| ∂ |音,比如system,英式为|'sistim|,美式为|'sist
为什么美式不是|'s∂stim/?
异oo的世界1年前1
游禽 共回答了17个问题 | 采纳率82.4%
事实上,英式英语中system也可以读作/'sist∂m/(查查有道和百度词典都是这样哦~)
英式英语和美式英语在语法和发音都有不少区别,这是由地域和文化等众多因素影响的~所以,为什么美式发音和英式不一样这样的问题并没有太大的意义了.而且,即使音标一样,发音也会有相当大的区别.例如,water.你可以仔细听听这个单词的美式和英式发音(差别很大)
在wa这个音上英式张口小很多,更像wu而不像“喔”~在er这个音的处理上,英式舌头偏前,美式偏后,有儿化音的感觉.怎么说呢,英式英语的发音语调更抑扬顿挫,不过奇怪的给人一种委婉的感觉.美式英语偏向简洁明快.
嗯……至于什么情况下英式英语中读| i |的音,读美式时需读| ∂ |音么,好像书上没有什么明确的方法鉴定……要多遇到单词自己多读多积累了.
a law that requires improvement to the system.
a law that requires improvement to the system.
这句话的主谓宾定状补 分别是什么?to引导什么语 帮我分析一下这句的结构
我看你是有病的1年前3
hrkang 共回答了15个问题 | 采纳率93.3%
a law that requires improvement to the system (is .)
a law (is .)
主语 系表
that requires improvement to the system
这个是主语的定语从句.
that requires improvement
需要提高.
to the system
这是目的状语.也可看成宾补.
英语翻译At the same time,in the stage of system architecture des
英语翻译
At the same time,in the stage of system architecture design,the performance of system software is assessed to prevent to solve the performance problems due to the architecture design when the system has been achieved,in order to speed up the software development cycle,at the same time,embedded software testing tools are successfully introduced,the code coverage implemented is clearly known,which code have been covered to ensure the safety of the code.
游泳池里泡澡1年前1
理工无梦1 共回答了22个问题 | 采纳率90.9%
为了缩短软件开发周期,在系统进行架构设计阶段的同时,对软件的性能进行评估,以防止系统架构设计已经完成后再来修改性能.同时,嵌入式软件测试工具成功引进,使我们清楚的知道哪些代码已被覆盖,这样可以确保代码的安全.
因该就是这样了,原文写的比较拗口...希望对你有帮助