主线程(进程)退出后,主线程创建的守护线程也会退出吗? 通过下面的代码测试: Demo1: 进程创建普通线程 #!/usr/bin/python3 # FileName: daemonThread.py # Author: lxw # Date: 2016-02-25 import threading import time def show(num): time.sleep(3) print("In show(): {0}".format(num)) with open("…

Sub Thread to update main Thread (UI)  2 Handler.post(somethread); Handler.sendMessage("Msg"); import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.v…

Sub Thread to update main Thread (UI) main Thread :   A  has Hander.HandleMessage() to process the "Msg" from subthread B; Sub Thread :    B  use  Hander.sendMessage(Msg)  to main Thread A; import java.util.Timer; import java.util.TimerTask; imp…

最近在使用目标识别api,但是报错了: File "/usr/local/lib/python2.7/dist-packages/tensorflow/python/ops/script_ops.py", line 158, in __call__ ret = func(*args) File "/home/lyz/code/share_pro/models/research/object_detection/utils/visualization_utils.py"…

The HTML importer should not be called from a background thread (that is, the options dictionary includesNSDocumentTypeDocumentAttribute with a value of NSHTMLTextDocumentType). It will try to synchronize with the main thread, fail, and time out. Cal…

今天花费了一天的时间来解决这个bug. 这种在程序运行期间出现的问题比较棘手,如果再没有规律的话就更难解决. 还好这个bug是由规律的,也就是说在程序执行半个小时左右后就会因为此异常而导致程序退出:那么在网上找了下原因,无非是说一下几点: 1.把业务放在子线程中去完成,然后通过handler来更新界面 2.通过runOnUiThread的方法来实现 再补充一点就是:优化代码,将不需要重复执行的代码执行一次就ok了,特别是需要绘制UI的代码更不能随便放在重复执行的地方 一.bug现场还原 我的程序…

reloadData should be called in main thread, so if you call it in work thread, you should call it as follows: dispatch_async(dispatch_get_main_queue(), ^{ [_tableVC.tableView reloadData]; }); otherwise UI refresh will be delayed, but not realtime.…

例的结果,下面的: main thread starting- Thrad 2 staring- Thrad 2 end- Thrad 4 staring- Thrad 4 end- Thrad 1 staring- Thrad 1 end- Thrad 3 staring- Thrad 3 end- Thrad 5 staring- Thrad 5 end- main thread end- CountDownLatch方式代码例如以下: package com.test.thread; im…

崩溃输出日志 2017-08-29 14:53:47.332368+0800 HuiDaiKe[2373:1135604] This application is modifying the autolayout engine from a background thread after the engine was accessed from the main thread. This can lead to engine corruption and weird crashes. Stack…

AJAX的容易错误的地方 Ajax.html:35 [Deprecation] Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.Ajax @ Ajax.html:35(anonymous) @ Aj…