Kotlin高阶函数及函数作为参数传递

zhangphil2026-01-27 8:23

Kotlin高阶函数及函数作为参数传递

Kotlin 复制代码

import kotlin.random.Random

fun main() {
    var n = 2025
    var s = "zhang"
    myTask(n, s, ::onStart)

    n = 2026
    s = "phil"
    myTask(n, s, ::onStop)
}

private fun myTask(n: Int, s: String, func: (n: Int, s: String, result: Boolean?) -> Unit) {
    apiTask(n, s, object : ApiCallback {
        override fun apiExec(n: Int, s: String, result: Boolean) {
            func.invoke(n, s, result)
        }
    })
}

private fun onStart(n: Int, s: String, result: Boolean? = false) {
    println("onStart $n $s $result")
}

private fun onStop(n: Int, s: String, result: Boolean? = false) {
    println("onStop $n $s")
}

fun apiTask(n: Int, s: String, callback: ApiCallback) {
    println("task $n $s")
    callback.apiExec(n, s, Random.nextBoolean())
}

interface ApiCallback {
    fun apiExec(n: Int, s: String, result: Boolean) {}
}

运行输出：

task 2025 zhang

onStart 2025 zhang false

task 2026 phil

onStop 2026 phil