private fun test() {
        // 原來的寫法，現(xiàn)在會崩潰
//        runBlocking {
//            Log.d("TAG", "Start")
//            launch {
//                delay(100)
//                Log.d("TAG", "Task from runBlocking")
//            }
//            supervisorScope {
//                val firstChild = launch {
//                    Log.d("TAG", "First Child")
//                    throw AssertionError("First child is cancelled")
//                }
//                val secondChild = launch {
//                    Log.d("TAG", "Second Child")
//                }
//                Log.d("TAG", "Cancelling supervisor")
//            }
//            Log.d("TAG", "End")
//        }
        // 最新的寫法
        runBlocking {
            Log.d("TAG", "Start")
            launch {
                delay(100)
                Log.d("TAG", "Task from runBlocking")
            }
            supervisorScope {
                // 需要將CoroutineExceptionHandler，作為參數(shù)，才有效果，不然會崩潰
                val firstChild = launch(CoroutineExceptionHandler { _, _ -> }) {
                    Log.d("TAG", "First Child")
                    throw AssertionError("First child is cancelled")
                }
                val secondChild = launch {
                    Log.d("TAG", "Second Child")
                }
                Log.d("TAG", "Cancelling supervisor")
            }
            Log.d("TAG", "End")
        }
    }

import kotlinx.coroutines.*
import java.net.URL
suspend fun fetchResponse(code: Int, delay: Int) = coroutineScope {
    val deferred: Deferred<String?> = async {
            URL("http://httpstat.us/$code?sleep=$delay").readText()
        }
    try {
        val response = deferred.await()
        println(response)
    } catch(ex: CancellationException) {
        println("${ex.message} for fetchResponse $code")
    }
}
runBlocking {
    val handler = CoroutineExceptionHandler {_, ex ->
        println("exception handled: ${ex.message}")
    }
    val job = launch(Dispatchers.IO + SupervisorJob() + handler) {
        // 協(xié)程1
        launch{fetchResponse(202, 1000)} // 協(xié)程2
        launch{fetchResponse(404, 2000)} // 協(xié)程3
        launch{fetchResponse(200, 3000)} // 協(xié)程4
    }
    job.join()
}