kotlin - 从 kotlin 调用 java varargs 方法

Question

我有一个java函数:

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

我想从 kotlin 调用它:

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

但是编译不出来，告诉我有类型不匹配，Settings是必需的，但参数是 kotlin.Array<out Settings>

我看到它正在尝试将其与签名匹配

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

但我想用

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

Answer 1

您应该使用以下语法:

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

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