Android协程async并发执行结构化并发。

首先我们先看一下错误的案例

/*** 按照顺序执行携程*/&＃64;Testfun &＃96;test sync&＃96;() &＃61; runBlocking {//统计函数执行时间val userTime &＃61; measureTimeMillis {val one &＃61; doOne()val two &＃61; doTwo()println("相加之和为&＃xff1a;${one &＃43; two}")}println(" userTime ${userTime}")}private suspend fun doOne(): Int {delay(1000)return 14}private suspend fun doTwo(): Int {delay(1000)return 15}

2s多

那我们肯定是想在1s左右处理完。这明显有些耗时间。。如何优化呢

改为并发执行

/*** 按照顺序执行携程*/&＃64;Testfun &＃96;test sync&＃96;() &＃61; runBlocking {//统计函数执行时间val userTime &＃61; measureTimeMillis {val one &＃61; async { doOne() }val two &＃61; async { doTwo() }println("相加之和为&＃xff1a;${one.await() &＃43; two.await()}")}println(" userTime ${userTime}")}

如何改为并发执行呢&＃xff1f;

但是千万不要使用这种写法

//错误示范val time3 &＃61; measureTimeMillis {val one &＃61; async { doOne() }.await()val two &＃61; async { doTwo() }.await()Log.e(TAG, "the 3 result:${one &＃43; two}")}Log.e(TAG, "Completed 3 in $time3 ms")


否则还会是2s

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