[移动开发]Android多线程执行判断结束标志

fun test2() {
    val countDownLatch = CountDownLatch(5)
    val start = System.currentTimeMillis()
    for (i in 0 until 5) {
        val thread = Thread(Runnable {
            Thread.sleep((i * 1000).toLong())
            println("${Thread.currentThread().name}:执行结束")
            countDownLatch.countDown()
        })
        thread.start()
    }
    //锁住主线程
    countDownLatch.await()
    println("所有线程结束")
    val end = System.currentTimeMillis()
    println((end - start) / 1000)
}

private fun test1() {
    val newFixedThreadPool = Executors.newFixedThreadPool(5)
    val start = System.currentTimeMillis()
    for (i in 0 until 5) {
        val runnable = Runnable {
            Thread.sleep((i * 1000).toLong())
            println("${Thread.currentThread().name}:执行结束")
        }
        newFixedThreadPool.submit(runnable)
    }
    newFixedThreadPool.shutdown()
    while (true) {
        if (newFixedThreadPool.isTerminated) {
            println("所有线程结束")
            break
        }
    }
    val end = System.currentTimeMillis()
    println((end - start) / 1000)
}