overriding

Override Power button just like Home button

柔情痞子 提交于 2019-11-26 11:40:47
Well, I am doing something in which I want to disable all hard buttons of the device. Hard buttons like Power, Home, Volume up, Volume down, Search, Back. I have successfully overridden almost all buttons here except Power. So I just want you people to see and please share some ideas so that I get can away with it. I am getting the long press Power keyevent in onDispatchKeyEvent() , in the same way I want to catch the short click of the same. Moreover when pressing power I also tried to stop Screen off by getting the Broadcast of SCREEN_OFF and I succeeded in receiving it but I was not able to

Wrong specialized generic function gets called in Swift 3 from an indirect call

眉间皱痕 提交于 2019-11-26 11:38:28
问题 I have code that follows the general design of: protocol DispatchType {} class DispatchType1: DispatchType {} class DispatchType2: DispatchType {} func doBar<D:DispatchType>(value:D) { print(\"general function called\") } func doBar(value:DispatchType1) { print(\"DispatchType1 called\") } func doBar(value:DispatchType2) { print(\"DispatchType2 called\") } where in reality DispatchType is actually a backend storage. The doBar functions are optimized methods that depend on the correct storage

Overriding vs Hiding Java - Confused

泪湿孤枕 提交于 2019-11-26 11:31:47
I'm confused on how Overriding differs from Hiding in Java. Can anyone provide more details on how these differ? I read the Java Tutorial but the sample code still left me confused. To be more clear, I understand Overriding well. My issue is that I don't see that hiding is any different except for the fact that one is at the instance level while the other is at the class level. Looking at the Java tutorial code: public class Animal { public static void testClassMethod() { System.out.println("Class" + " method in Animal."); } public void testInstanceMethod() { System.out.println("Instance " + "

Overriding static variables when subclassing

梦想的初衷 提交于 2019-11-26 11:26:28
问题 I have a class, lets call it A, and within that class definition I have the following: static QPainterPath *path; Which is to say, I\'m declaring a static (class-wide) pointer to a path object; all instances of this class will now have the same shared data member. I would like to be able to build upon this class, subclassing it into more specialised forms, layering behaviour, and with each class having its own unique path object (but not having to repeat the boring bits like calculating

Can java call parent overridden method in other objects but not subtype?

这一生的挚爱 提交于 2019-11-26 10:34:10
here is working java code class Cup { public String sayColor() { return "i have a color ."; } } class TCup extends Cup{ public String sayColor(){ System.out.println(super.getClass().getName()); return super.sayColor()+"color is tee green."; } } class MyTCup extends TCup { public String sayColor(){ System.out.println(super.getClass().getName()); return super.sayColor()+"but brushed to red now!"; } } class Test { public static void main(String[] args) { Cup c = new MyTCup(); System.out.print(c.sayColor()); } } and running the Test class prints MyTCup MyTCup i have a color .color is tee green.but

Java: Overriding function to disable SSL certificate check

两盒软妹~` 提交于 2019-11-26 10:29:24
问题 The web service is rest over SSL and it has self signed certificate, hosted in remote system.I have already created a client accessing that web service. This is done by adding the certificate to the key store programatically. Now I heard that, it is not necessary to add certificate to key store for accesing a self signed web service. Instead we can disable the certificate check by overriding some methods. Is this true? Which are those methods? Please help. 回答1: This should be sufficient. I

Overriding GetHashCode for mutable objects?

感情迁移 提交于 2019-11-26 10:26:00
问题 I\'ve read about 10 different questions on when and how to override GetHashCode but there\'s still something I don\'t quite get. Most implementations of GetHashCode are based on the hash codes of the fields of the object, but it\'s been cited that the value of GetHashCode should never change over the lifetime of the object. How does that work if the fields that it\'s based on are mutable? Also what if I do want dictionary lookups etc to be based on reference equality not my overridden Equals

Why do we have to call super in Android sometimes?

眉间皱痕 提交于 2019-11-26 10:25:03
问题 Sometimes when I override methods, I get an exception the first time it\'s called like below: 05-31 21:32:04.266: E/AndroidRuntime(28471): android.support.v4.app.SuperNotCalledException: Fragment AnalFragment{41795860 #1 id=0x7f070002} did not call through to super.onDestroy() Why are we forced to call super.method() ? It makes sense that there are obligations by the parent class, but more importantly, how do we know that a method requires super to be called, rather than waiting for it to

What is function overloading and overriding in php?

无人久伴 提交于 2019-11-26 10:07:29
In PHP, what do you mean by function overloading and function overriding. and what is the difference between both of them? couldn't figure out what is the difference between them. Jacob Relkin Overloading is defining functions that have similar signatures, yet have different parameters. Overriding is only pertinent to derived classes, where the parent class has defined a method and the derived class wishes to override that method. In PHP, you can only overload methods using the magic method __call . An example of overriding : <?php class Foo { function myFoo() { return "Foo"; } } class Bar

Overriding a JavaScript function while referencing the original

喜夏-厌秋 提交于 2019-11-26 09:58:11
I have a function, a() , that I want to override, but also have the original a() be performed in an order depending on the context. For example, sometimes when I'm generating a page I'll want to override like this: function a() { new_code(); original_a(); } and sometimes like this: function a() { original_a(); other_new_code(); } How do I get that original_a() from within the over-riding a() ? Is it even possible? Please don't suggest alternatives to over-riding in this way, I know of many. I'm asking about this way specifically. Matthew Crumley You could do something like this: var a =