英文:
cancel Kotlin coroutine job on certain points
问题
Kotlin协程的作业会在执行到第一个可暂停的函数时被取消。但我希望取消在我想要的特定点发生，而不是在任何可暂停的函数调用时。
我想在特定的点检查取消并手动完成作业，就像线程中断一样。
假设一个作业正在运行并达到了一个延迟函数，然后发生了取消，我想捕获取消异常并设置标志 running = false，然后继续执行作业，并在我想要的地方稍后完成作业。
考虑到当取消发生时，我希望取消延迟函数的调用，而不是等待延迟。
另外，我想提醒一下，我是在Android Studio中进行这个操作。
英文:
Kotlin coroutines jobs will be canceled when the execution reaches the first suspendable function. but I want this cancellation to happen on certain points that I want, not any suspendable function calls.
I want to check cancellation on certain points and manually finish the job, just like Thread interruptions.
Assume that a job is running and reached a delay function, then cancellation occurred, I want to catch the cancellation exception and set flag running = false, then continue executing the job and finish the job later on where I want.
Consider that I want delay function calls to be cancelled when cancellation occurs, and don't wait for the delay.
Also I want to mention that I'm doing this in android studio.
答案1
得分: 1
你尝试过使用invokeOnCompletion函数来在该任务被取消时执行所需操作吗？
大致如下：
val job = launch {
// ...
}
job.invokeOnCompletion {
if (job.isCancelled) {
// 在任务被取消时，在此处执行所需操作
// ...
}
}
如果需要在任务取消后继续执行任务，可以设计一些检查点来实现。
英文:
Have you tried the invokeOnCompletion function to do whatever you need when that job is cancelled?
It would be something like this:
val job = launch {
...
}
job.invokeOnCompletion {
if (job.isCancelled) {
//Do whatever you need here when the job is cancelled
...
}
}
If you need to continue with the task after its cancellation, then design it with some kind of checkpoints and then you're set.
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