sleep

Thread.sleep() in a while loop

由 北城以北 提交于 2019-12-10 00:45:19
问题 I notice that NetBeans is warning me about using Thread.sleep() in a while loop in my Java code, so I've done some research on the subject. It seems primarily the issue is one of performance, where your while condition may become true while the counter is still sleeping, thus wasting wall-clock time as you wait for the next iteration. This all makes perfect sense. My application has a need to contact a remote system and periodically poll for the state of an operation, waiting until the

How I can receive hardware key events in sleep mode?

由 谁说我不能喝 提交于 2019-12-09 19:08:21
问题 I'm writing an application that allows people in danger to call 911. This is how it should work: He (or she) feels danger. He pushes the volume-down key three times. My app calls 911. But I'm facing the following problem: how can I receive a hardward key event in sleep mode ? I've searched Google and other search engines, but can't find anything related. 回答1: public class YourBoardcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if

How to wake up Android Wear when it is in sleep mode?

由 社会主义新天地 提交于 2019-12-09 11:32:48
问题 When Android Wear goes to sleep mode (screen dimmed), some parts of my code are not executed. I use Timer in background service to trigger some actions, such as sending data from wear to mobile, but the data is not sent. It is sent when I tap the screen to wake it up. I also try to use Timer trigger a notification with vibration when the screen is off, but it doesn't appear until I tap the screen. In debug mode (either Bluetooth or USB), data sending and notification work fine. I suspect this

How to check if a thread is sleeping?

由 岁酱吖の 提交于 2019-12-09 02:51:32
问题 Is there any way to check if a given thread is sleeping? 回答1: You can call Thread.getState() on and check if the state is TIMED_WAITING. Note, however that TIMED_WAITING doesn't necessarily mean that the thread called sleep(), it could also be waiting in a Object.wait(long) call or something similar. 回答2: Here is an fairly ugly hack to check if the other thread is sleeping: public static boolean isSleeping(Thread t) { StackTraceElement[] ste = t.getStackTrace(); if (ste.length == 0) return

Difference between puts() and printf() in C while using sleep()

由 主宰稳场 提交于 2019-12-08 18:50:48
问题 I was wondering the difference between puts() and printf() functions while using sleep() function. Here is my code(In C language): printf("hello, world"); sleep(1); printf("Good, bye!"); After compiling and running the program, it seems that it will sleep first and then print "hello, worldGood, bye!" However, if using puts() instead of printf(), it will print "hello, world" then sleep, and finally print "Good, bye". puts("hello, world"); sleep(1); puts("Good, bye!); 回答1: This is because of

Is uninterruptible sleep the cause of my Python program being really slow (and if so, how can I solve this?)?

由 五迷三道 提交于 2019-12-08 14:43:47
问题 I have the following select statement (using sqlite3 and the pysqlite module): self.cursor.execute("SELECT precursor_id FROM MSMS_precursor "+ "JOIN spectrum ON spectrum_id = spectrum_spectrum_id "+ "WHERE spectrum_id = spectrum_spectrum_id "+ "AND ROUND(ion_mz,9) = ? AND ROUND(scan_start_time,4) = ? "+ "AND msrun_msrun_id = ?", select_inputValues) Which takes 55 seconds when running in Python. When running it directly on the SQLite command line it only takes 15ms. Now, I noticed that when it

Inaccurate time.sleep() with Python 3.x and Windows 7

由 ↘锁芯ラ 提交于 2019-12-08 13:19:29
Following on from this post, I've identified a non-functional implementation of Python's time.sleep() function under Windows 7 (Enterprise, 64-bit and Python 3.4.4). Here's the reference .py script: import threading, time def Return(): return def Setup(): for _ in range(10): time_before = time.time() Return() wait_delay = -time.time() delays = [] InputFrequency = 60 while (time.time() - time_before) < (1 / InputFrequency): time.sleep(0) wait_delay += time.time() delays.append(wait_delay) print("Output frequency: " + str([1/t for t in delays][0]) + " Hz") threading.Thread(target=Setup).start()

Sleep in javascript loop?

由 牧云@^-^@ 提交于 2019-12-08 11:35:25
问题 I'll start by explaining what is it that I'm trying to do :) My application is implemented using PHP (Zend framework) and Javascript. I want to make a questionnaire for my application and so far I have done the following: My page consists of series of <div class='question #'> elements where # denotes the index of the spesific question. For example my HTML looks like this: <div class="question 1 active"> </div> <div class="question 2"> </div> <div class="question 3"> </div> . . . etc. Now the

C sleep method obstructs output to console

由 放肆的年华 提交于 2019-12-08 10:06:48
问题 I have a C program, where I just wanted to test if I could reproduce a console spinner used in npm install while it installs a module. This particular spinner simply spins in this order: | / - \ on the same space, so I use the following program: #include <stdio.h> int main() { char sequence[4] = "|/-\\"; while(1) { for(int i = 0; i < 4; i++) { // \b is to make the character print to the same space printf("\b%c", sequence[i]); // now I want to delay here ~0.25s } } } So I found a way to make

Synchronous Sleep function in Javascript

由 强颜欢笑 提交于 2019-12-08 09:00:28
问题 I want to simulate a progress bar using JS/JQuery, this is my HTML code : <p id="percentage">0%</p> I want to go from 0 to 100 and see -Visually- the progress in slow motion, So What I need exactly is a For Loop and a pause function, but unfortunately there is no sleep-like function in Javascript 1st try : After doing some research, I found the setTimeOut function in Jquery , you can find herein the Javascript code : for (i = 0; i < 100; i++) { setTimeout(function() { $("#percentage").text(i+
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