从Kotlin调用Java varargs方法 [英] Call java varargs method from kotlin

问题描述

我有一个Java函数:

I have a java function:

public static void initialize(@NonNull Activity activity, Settings... settings) {}

我想用Kotlin来称呼它

I want to call it from kotlin:

fun initialize(activity: Activity, vararg settings: settings) = JavaClass.initialize(activity, settings)

但是它不能编译，告诉我类型不匹配，需要Settings，但是参数是kotlin.Array<out Settings>

But it does not compile, telling me that there is type mismatch, Settings is required, but the argument is kotlin.Array<out Settings>

我看到它正在尝试将其与签名匹配

I see that it's trying to match it with signture

public static void initialize(@NonNull Activity activity, Settings settings) {}

但我想使用

public static void initialize(@NonNull Activity activity, Settings[] settings) {}

推荐答案

您应使用以下语法:

fun initialize(activity: Activity, vararg settings: settings) =
    JavaClass.initialize(activity, *settings)

https://kotlinlang.org/docs/reference/java-interop.html#java -varargs

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