exit | 易学教程

Exit on application crash

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问题 when ever any application crash come I want to exit from the app ? How to achieve same. does Android manifest have any provision for same. 回答1: I would recommend to register a global UncaughtExceptionHandler. This catches all the exceptions that are not handled. Then you can do there what you want. For example close the app, inform the user and send a log to yourself. 回答2: You could also use ACRA or a service like BugSense that solve this problem. 来源： https://stackoverflow.com/questions

Exit on application crash

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C: explain if(exit(0),0){} line of code

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问题 I am learning C and as an exercise, I'm trying to write a simple program without any semicolons. I've had some trouble with replacing return 0 statement but I've found that this is (the only?) way to do it in C: if(exit(0),0){} . How exactly does this statement work? I know that exit() from stdlib is a void function but I don't understand what the ,0 part in the if works (the rest is clear to me). 回答1: The , operator in C evaluates both its arguments, and returns the value of the second one.

What is the difference between echo('exit'); die; and die('exit');?

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问题 I have seen some code do this: if(something){ echo 'exit from program'; die; } ...more code And others that just use die : if(something) die('exit from program'); ...more code Is there any inherent difference in when it would end the program, should I be aware of the code that comes after it? etcetera UPDATE I am asking mainly, if it is a coding style, or if there is a real reason why some is coded one way versus another. I am not asking what the difference between exit and die is. 回答1: No,

Android - How to exit an app when user press the home button?

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问题 I want to know how to exit an app when user press the Home Button. As far as i know that Home Button moves the running app in background and puts Launcher process in front. I know i can use finish() but i don't know where i should call it because i have no idea which function is going to get a call when user will press the Home Key. Thanks. 回答1: Depending on what you want to do, overriding onUserLeaveHint might be the best bet: http://developer.android.com/reference/android/app/Activity.html

023 UNIX再学习 -- 函数abort

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abort 函数之前有讲过的，参看： C语言再学习 -- 关键字return和exit ()函数然后我们在讲 8 中进程终止时，也说过。参看： UNIX再学习 -- exit 和 wait 系列函数下面来详细讲一下它。一、函数 abort # include <stdlib.h> void abort ( void ) ; 此函数无返回值 1、函数功能 abort 函数的功能是使程序异常终止 2、函数解析 abort 函数首先解除进程对 SIGABRT 信号的阻止，然后向调用进程发送该信号。 abort 函数会导致进程的异常终止除非 SIGABRT 信号被捕捉并且信号处理句柄没有返回。如果 abort 函数导致进程终止，则所有打开的流都将关闭并刷新。如果SIGABRT信号被忽略，或被返回的处理程序捕获，则abort（）函数仍将终止进程。它通过恢复 SIGABRT 的默认配置，然后再次发送信号来做到这一点。 3、abort 函数实现 # include <signal.h> # include <stdio.h> # include <stdlib.h> # include <unistd.h> void abort ( void ) /* POSIX-style abort() function */ { sigset_t mask; struct

Exiting Fullscreen With The HTML5 Video Tag

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问题 I'm trying to get the video to exit fullscreen at the end of the video but it won't. I searched and found ways to do this but for the life of me I can't get it to work. I'm testing in the latest version of Chrome (15) and iOS 5 on the iPad2. Here's the code I'm using: <html> <head> <script src="http://code.jquery.com/jquery-2.1.3.min.js"></script> <script> $(document).ready(function(){ $("#myVideoTag").on('ended', function(){ webkitExitFullScreen(); }); }); </script> <meta http-equiv="Content

How to exit a function in bash

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问题 How would you exit out of a function if a condition is true without killing the whole script, just return back to before you called the function. Example # Start script Do scripty stuff here Ok now lets call FUNCT FUNCT Here is A to come back to function FUNCT { if [ blah is false ]; then exit the function and go up to A else keep running the function fi } 回答1: Use: return [n] From help return return : return [n] Return from a shell function. Causes a function or sourced script to exit with

Is it up to the programmer to deallocate on exit()?

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问题 I have a program and when I input wrong data from the keyboard it just exits with exit(1) . I was testing with Valgrind and while this happens there are no errors, but I can see that there are still reachable x bytes. So my question: Is it up to the programmer to free memory before hitting an exit() or is the OS going to take care of it? 回答1: It's a good idea (and in old enough versions of Windows, it was essential), but when a program exit() s on modern operating systems its entire address

Handle a WPF Exit Event

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问题 I was wondering if there was a way to handle a WPF Application Exit event such that the exit was cancelled. The use case is that I have a client-server situation where the server is a WPF app. I want the WPF app to notify the client when it is shutting down, but cancel the shutdown process. The client should receive the shutdown notification, do its own required cleanup and then ask the WPF app to shutdown via a request. Is this possible? 回答1: You can hook the event Closing on your main