lifecycle

问题 If I create an Objective-C iOS application in Xcode, a file named main.m is generated. The contents of the file look something like this: main.m #import <UIKit/UIKit.h> #import "AppDelegate.h" int main(int argc, char * argv[]) { @autoreleasepool { return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); } } And this is where an Objective-C iOS application begins its life. Importantly, if I want to subclass UIApplication (for whatever reason), then here is where I go

问题 I'm trying to wrap my head around scopes in Dagger 2, specifically the lifecycle of scoped graphs. How do you create a component that will be cleaned up when you leave the scope. In the case of an Android application, using Dagger 1.x you generally have a root scope at the application level which you'd extend to create a child scope at the activity level. public class MyActivity { private ObjectGraph mGraph; public void onCreate() { mGraph = ((MyApp) getApplicationContext()) .getObjectGraph()

问题 I am building a game that players can attack each other by turn. So first I set the name , job manually and generate life , damage , magic randomly in componentWillMount() . I hope that every time I submit the attack form, certain amount of life with be reduced from the attacked person. But now every time I submit, the whole state is regenerated(with all kinds of bugs). Can I do something to solve it? app.js : https://ghostbin.com/paste/ype2y attack.js : https://ghostbin.com/paste/wzm3m 回答1:

问题 I'm developing a presentation style application for HoneyComb Tablets. At one stage the tablet may be passed around a room for people to interact with. If possible I would like to prevent malicious users from navigating away from the current activity. So far I have overwritten the onBackPressed() to prevent finishing the activity but users can still press the other buttons on the status bar and also leave the app via notifications that pop up. Any suggestions or possible solutions? Thanks 回答1

问题 In my application, I am calling gps setting menu if gps is not enabled. I called this in Oncreate() method. However, I also wants to check whether user actually enables it or not? My Question is which activity life cycle method gets called when user get back from setting menu. I tried to write code for OnResume method. But alertdilogue keeps poping even GPS is enabled. if (gps.canGetLocation()) { latitude = gps.getLatitude(); longitude = gps.getLongitude(); altitude = gps.getAltitude();

问题 I have an Activity which when clicking the menu and a button appearing there, goes to a PreferenceActivity , and then loads three ListPreferences . The ListPreference lets the user choose several values to update a remote DB, and I would like that to save those values when the application goes paused for example. As the ListPreference are in the PreferenceActivity , how can I get those values? Where should I save the current preferences state, in the Activity or in the PreferenceActivity ?

问题 Here, it is mentioned by the author. If it's[COMPONENT] marked valid, then both returns the same value, namely the submitted, converted and validated value. Consider a very simple snippet: <h:form> <h:inputText value="#{bean.inputValue}" binding="#{bean.htmlInputText}" validator="nameValidator" /><br/> <h:commandButton value="Submit" action="#{bean.action}" /> </h:form> with a @RequestScoped backing bean- public Integer inputValue = 5; public HtmlInputText htmlInputText; public void action(){

问题 When trying to access to a DOM of the document, I find that the template is only partially executed. If I use a setTimeout I can workaround the problem, but how is the proper way to do it? import { Component, Input, AfterContentInit } from '@angular/core'; import { AppService } from './app.service'; @Component({ selector: 'tabs', templateUrl: './templates/app.html', providers: [ AppService ] }) export class ShowBookmarksComponent implements AfterContentInit { private addListeners():void { let

问题 gtkmm provides lifetime management of widgets using this sort of construct: Gtk::Widget* aWidget = Gtk::manage(new Widget()); Gtk::Widget containerWidget; containerWidget.add(*aWidget); This delegates lifetime management of aWidget to containerWidget. When containerWidget is cleaned up, it also cleans up aWidget - similar to Delphi's 'owner' concept. We also have several types of smart pointers, particular the C++ 11 smart pointers templates, which I use everywhere. I find the manage/add

问题 Seems this has been a pain for some time now (did quite a bit of research in SO and on the net) In a nutshell the android documentation states: onReceive will be called before every other lifecycle method calls onDeleted will be called when a widget is removed onDisabled will be called when the last widget is deleted Well, when deleting a widget neither onReceive nor subsequently onDeleted is being called. Similarly, when the last widget is removed the code does not reach to onDisabled either