For example, this is how to declare the main function. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 fun main(args: Array<string>) { // code here } The main function must be present in each Kotlin program. It accepts an array of strings as parameter and returns nothing. If a fun...
*/ class VariableVSValue { fun declareVar() { var a = 1 a = 2 println(a) println(a::class) println(a::class.java) var x = 5 // 自动推断出 `Int` 类型 x += 1 println("x = $x") } fun declareVal() { val b = "a" //b = "b" //编译器会报错: Val cannot be ...
第一步：接口获取当前用户 token 及用户信息 第二步：将用户的昵称展示界面上 第三步：然后再通过这个...
//Always use immutable collection interfaces (Collection, List, Set, Map) to declare collections which are not mutated. //Default parameter values fun foo(a: String = "a") { ... } //If you have a functional type or a type with type parameters which is used multiple times in a code...
Imagine you’re creating a game of cards, and you want to store the players’ names in a list. The list will need to change as players join or leave the game, so you need to declare a mutable list:val players = mutableListOf("Alice", "Bob", "Cindy", "Dan") Heads up... You...
<declare-styleable name="RefreshRecyclerView"> <attr name="recycler_background" format="color" /> </declare-styleable> 使用示例 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent...
*/ class VariableVSValue { fun declareVar() { var a = 1 a = 2 println(a) println(a::class) println(a::class.java) var x = 5 // 自动推断出 `Int` 类型 x += 1 println("x = $x") } fun declareVal() { val b = "a" //b = "b" //编译器会报错: Val cannot be ...
fun declareVal() { val b = "a" //b = "b" //编译器会报错: Val cannot be reassigned println(b) println(b::class) println(b::class.java) val c: Int = 1 // 立即赋值 val d = 2 // 自动推断出 `Int` 类型 val e: Int // 如果没有初始值类型不能省略 ...
KT-40904 No warning when declare actual in the same target (module) as expect KT-56707 K2: Unexpected TYPECHECKER_HAS_RUN_INTO_RECURSIVE_PROBLEM where only getter type specified explicitly KT-56508 Context receivers: Internal compiler error when compiling code containing a class with a secondary ...
在经历了MVC和MVP之后,MVVM开发模式应运而生,MVVM的高度解耦和搭配ViewModel、LiveData等JetPack组件使用,减少因生命周期搞出的BUG的同时,也让我们可以更加关注业务代码,减少一些细节的关注,总的来说就是不但省心还能偷懒。 Kotlin Android开发的亲儿子,使用过JAVA语言的话,上手难度很低,看看语法,一周之内就能掌握,对于...