To understand a data object class, we need to understand what a data class is. In Kotlin, theobjectanddata objectare both related to singleton objects, but they serve different purposes and have distinct feature
父类静态代码块(companion object)→ 子类静态代码块(companion object)→ 父类属性初始化 → 父类 init 代码块 → 父类构造函数 → 子类属性初始化 → 子类 init 代码块 → 子类构造函数。 3 主构造函数 主构造函数是紧接在类名后面的构造函数,次要构造函数是类体内部定义的构造函数,它们的区别如下。 主构造...
objectMyGlobalScope : CoroutineScope { overridevalcoroutineContext: CoroutineContext get() = EmptyCoroutineContext } funMyGlobalScope(){ MyGlobalScope.launch { // xxxxxx } } 自定义一个 ViewCoroutineScope 仅为示例,不推荐在项目中使用 跟view的移除,取消作用域协程的执行...
classPerson(firstName:String){init{println("firstName:${firstName}")}constructor(firstName:String,url:String):this(firstName){println("url:${url}")}constructor(name:String,time:Int):this(name){println("Time:${time}")}}funmain(array:Array<String>){//Kotlin之中 创建对象 没有New关键字var...
sealed class 子类可扩展局部以及匿名类以外的任意类型子类,包括普通 class、data class、object、sealed class 等,子类信息在编译期可知。 假使匿名类扩展自 sealed class 的话,会弹出错误提示: This type is sealed, so it can be inherited by only its own nested classes or objects ...
() // 添加项弹窗消失事件 object AddingNoteDialogDismiss : Event() // 添加项弹窗添加确认点击事件 data class AddingNoteDialogConfirm(val title: String, val desc: String) : Event() // 添加项弹窗取消确认点击事件 object AddingNoteDialogCanceled : Event() } sealed class Effect : UiEffect { //...
public class com/xxxx/java/SDK { // compiled from: SDK.java // access flags 0x1 public <init>()V L0 LINENUMBER 3 L0 ALOAD 0 INVOKESPECIAL java/lang/Object.<init> ()V RETURN L1 LOCALVARIABLE this Lcom/xxxx/java/SDK; L0 L1 0 ...
False negative [FINAL_SUPERTYPE] on extending final class through type alias KT-59644 K2: the companion object in an expect class requires to be explicitly defined for compileNativeMainKotlinMetadata KT-59640 K2: expect constructor requires calling this or super but didn't use to KT-59404 K2: ...
let不能再次赋值. 如果对象类型是struct, 不能更新对象的任何字段. 如果是class, 则仍可更新对象的var字段. var可以给变量重新赋值, 也可以更新变量的var字段. var可以声明一个mutable的集合类型. Kotlin: val和java中的final等价, 不能再给变量重新赋值, 但是仍然可以更新对象的var字段. ...
Data Export Using Sampling Analysis Managing the Default Data Processing Location Setting Multiple Data Processing Locations Attribution Usage Guide Using Activation Attribution Using Petal Ads Attribution (Outside the Chinese Mainland) Using AppGallery Paid Promotion Attribution (Outside the Chinese...