elapsedtime

问题 I am creating an app where a timer is set by the user. When the app goes to the background, the timer.invalidate() . Now I want the timer to start again when the app comes back to the foreground. I am creating another instance of timer to do it when the app sends notification that app is in the foreground. However, it's not firing the function. In Viewdidload() I am creating a timer: timer = Timer.scheduledTimer(timeInterval: 1, target: self, selector: #selector(handleCountdown), userInfo:

问题 I need to display elapsed time in my application form. I currently do this using this code: AppTimer = new Timer(); AppTimer.scheduleAtFixedRate(new java.util.TimerTask() { SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss"); public void run() { sdf.setTimeZone(java.util.TimeZone.getTimeZone("GMT+0")); lblAppRunTime.setText(""+sdf.format(new Date(AppTimeCounter*1000))); AppTimeCounter++; } },1000, 1000); This Code shows hours,minutes & seconds properly but how can I show DAYS & MONTHS?

问题 On posix it is possible to use timespec to calculate accurate time length (like seconds and milliseconds). Unfortunately I need to migrate to windows with Visual Studio compiler. The VS time.h library doesn't declare timespec so I'm looking for other options. As far as could search is it possible to use clock and time_t although I could't check how precise is counting millisecons with clock counting. What do you do/use for calculating time elapse in a operation (if possible using standards c+

问题 Using C#, how may I get the time remaining (before the elapse event will occur) from a System.Timers.Timer object? In other words, let say I set the timer interval to 6 hours, but 3 hours later, I want to know how much time is remaining. How would I get the timer object to reveal this time remaining? 回答1: The built-in timer doesn't provide the time remaining until elapse. You'll need to create your own class which wraps a timer and exposes this info. Something like this should work. public

问题 I have two Date s. How can I tell the difference between these two dates in days? I have heard of SimpleDateFormat , but I don't know how to use it. I tried this: String fromdate = "Apr 10 2011"; SimpleDateFormat sdf; sdf = new SimpleDateFormat("MMM DD YYYY"); sdf.parse(fromdate); Calendar cal = Calendar.getInstance(); cal.setTime(sdf); I also tried this: String date1 = "APR 11 2011"; String date2 = "JUN 02 2011"; String format = "MMM DD YYYY"; SimpleDateFormat sdf = new SimpleDateFormat

问题 This question already has answers here : How to format a duration in java? (e.g format H:MM:SS) (17 answers) Closed 2 years ago . I have a problem figuring out how to calculate the elapsed time between two timestamps (hours, minutes, seconds). This is the result: String starttime = beginElement.getTimestamp(); String endtime = element.getTimestamp(); I/Start time: 1496258892612 I/End time: 1496258928999 long diffTime = Long.parseLong(endtime) - Long.parseLong(starttime); I/Diff time: 36387

问题 Fiddle I am making a social network and when you post something, I want to show the time. I have the current code to display the time (this isn't only the time, it's also validating and posting the text): $('#b').click(function () { var v = $('#type').val(); var u = $('#input').val(); if (v !== "" && u !== ""){ var time = new Date(); var currentime = Date.now(); var x = currentime - time; $("ul").prepend("<li>" + v + "<br />Posted by " + u + " " + x +" minutes ago </li>"); $('#type, #input')

问题 I am trying to get the running time of Insertion Sort Algorithm. MSDN said that using CTime could get the Elapsed Time. But I tried many times and always got zero. I thought it is impossible that the time of running this algorithm is zero. There must be some error or something else. Could anybody help me? I posted my code below: #include <cstdlib> #include <iostream> #include <atltime.h> using namespace std; //member function void insertion_sort(int arr[], int length); int *create_array(int

问题 I wrote this class, to acquire audio data. I want to use the audio input to sample realtime RF signals. I sample @ 44kHz, and I expect to know the elapsed time by measuring the total acquired samples, knowing the sample frequency. I don't know why I found a delta time between elapsed time measured by system.nanoTime and acquired samples divided by frequency. Why this delta of about 170ms changing each time I start/stop acquisition? Am I losing samples from acquired signal? Basically, what I

问题 I've started the a desktop app development in C# (VS2010 .Net Fw 4.0) involving several timers. At first, I was using System.Timers in order to send data by USB to a data bus. My point is that I need to send different periodic binary messages with several specific intervals of time such as 10ms, 20ms, 40ms, 100ms, 500ms, 1000ms .... In each timer I have a callback function who has to send the correct data flow for each raised event. The problem is when I have the full amount of signals