lifecycle

问题 I am testing fragments in Android and I'm having some confusing behavior with Fragment life cycle. I have a activity that uses layouts in xml for both landscape and portrait modes. I have some code that accesses a EditText object that is defined in one of the fragment layouts. If I start the app in landscape mode things work. I access the component in the onResume() fragment method to update some text. According to the documentation the onResume() fragment method is called when the fragment

问题 I've gone rounds with this ever since I started programming classic ASP 12 (or so) years ago and I've never found a great solution because the architecture of ASP and ASP.NET has always been a swamp of bad practices, magic shared singletons, etc. My biggest issue is with the HttpApplication object with its non-event events ( Application_Start , Application_End , etc.). If you want to do stuff once for the entire lifespan of an HTTP application, Application_Start is the obvious place to do it.

问题 I have a requirement to restart the application when the user changes a preference. Clearing the stack doesnt help me since this doesnt cancel the backend service calls. I want to kill the application process itself. I am using Process.killProcess(Process.myPid()); and it works for me to kill the application. But what i need is to restart the application. Means kill the process and trigger a new process so the application start fresh once again. Is there a way to do this? Thanks in advance.

问题 I was reading Core JavaServer Faces and I was working on Event Handling. It says that if immediate=true for a component(lets say for a button), when we click that button, the process validation, and invoke application faces of the JSF life cycle will be done early. What does it mean? Can any body explain to me what the immediate=true will affect in each phases? I am confused. Thank you. 回答1: The following link most clearly demonstrates the JSF Lifecycle Phases, How to Debug them, and how

问题 I was reading Core JavaServer Faces and I was working on Event Handling. It says that if immediate=true for a component(lets say for a button), when we click that button, the process validation, and invoke application faces of the JSF life cycle will be done early. What does it mean? Can any body explain to me what the immediate=true will affect in each phases? I am confused. Thank you. 回答1: The following link most clearly demonstrates the JSF Lifecycle Phases, How to Debug them, and how

问题 I'm dealing with a legacy Java application with a large, fairly messy codebase. There's a fairly standard 'User' object that gets stored in the HttpSession between requests, so the servlets do stuff like this at the top: HttpSession session = request.getSession(true); User user = (User)session.getAttribute("User"); The old user authentication layer (which I won't describe; suffice to say, it did not use a database) is being replaced with code mapped to the DB with Hibernate. So 'User' is now

问题 Where can I find a detailed view of the lifecycle of a Windows Service as developed in .NET? I put my question this way because I am not sure that a detailed enough description can be posted here, but if you think you can please feel free to try. An example of an incorrect answer would be a paste of the description from the MSDN page: Introduction to Windows Service Applications. It is not nearly detailed enough. For instance, is a service unloaded out of memory, and therefor the Dispose

问题 I am confused about the lifecycle of Spring. XmlBeanFactory beanFactory = new XmlBeanFactory(new ClassPathResource("SpringHelloWorld.xml")); Whether the above snippet of codes creates the object or not? If the above answer is true. a) Then, for the bean where scope is "singleton" get the object which was created during the above snippet of code. Am i right or wrong? b) For the case where scope is "prototype", whether the created object was unused. Because, the container always return new

问题 I have an app that keeps a connection alive to a server, however if the user walks away and the tablet goes to sleep, I would like to handle the disconnect gracefully, and I would also like to log back in when the user wakes the tablet. I've tried in my putting the following code in my connection class, but they never get fired. Application.Current.Suspending += this.OnAppSuspending; Application.Current.Resuming += this.OnAppResuming;; 回答1: For desktop apps, you can use SystemEvents

问题 If i call mvn clean install maven knows that clean is a lifecycle and install is a phase of the default lifecycle if i call mvn deploy maven will execute all phases of the default lifecycle sequentially. Is there a way to call the default lifecycle by giving a lifecyle name (instead of executing the last phsae of the lifecycle)? EDIT: So the question is: is there a command mvn lifecyclename that start execution of the default lifecycle? 回答1: There is no command to run a lifecycle based on