Android,Kotlin妙用suspendCancellableCoroutine,同步执行异步回调代码

Posted 2022-10-22

妙用suspendCancellableCoroutine,同步执行异步回调代码

For Example

interface onRes 
    fun onSuccess(msg: String)
    fun onFailed(e: Exception)

• 原先我们写耗时回调

fun longTimeMethod(result: onRes) 
    //耗时操作
    result.onSuccess(msg)
    result.onFailed(Exception("..."))        

• 妙用suspendCancellableCoroutine

suspend fun longTimeMethod(): String = suspendCancellableCoroutine 
  longTimeMethod(object : onRes 
      override fun onSuccess(msg: String) 
          if (it.isCancelled) return
            it.resume(t)
    

        override fun onFailed(e: Exception) 
          it.resumeWithException(e)
    
  )