How to cancel a coroutine inside the coroutine Something lik

Question

How to cancel a coroutine inside the coroutine Something like in normal coding I can do `return` then the statement after this `return` will not be executed But what about inside a coroutine You can t `return` in a coroutine Seems the answer is `coroutineContext cancel ` But with `Anko` it said `coroutineContext of type CoroutineContext can t be invoked as a function`

gildor · Answer

Could you show some sample code

gildor · Answer

gt coroutineContext of type CoroutineContext can t be invoked as a function Because `coroutineContext` is not a function but property please check docs of kotlinx coroutines

albertgao · Answer

For this i suppose i just need to introduce real kotlin coroutine rather than the Anko one

albertgao · Answer

The code is here ``` private fun handleLogDetails = launch UI val result HttpResponse = bg authHelper logDetails await if result error showErrorDialog result errorMessage throw CancellationException do something when no error in result how to return above if I don t want to write if else ```

gildor · Answer

gt For this i suppose i just need to introduce real kotlin coroutine rather than the Anko one Anko uses real coroutines just update version of kotlinx coroutines in your project

gildor · Answer

Just use return instead of Cancellation ```if result error showErrorDialog result errorMessage return launch ```

albertgao · Answer

Save my day Thanks

albertgao · Answer

I use coroutine by adding these ``` implementation org jetbrains anko anko coroutines $anko version implementation org jetbrains anko anko sdk25 coroutines $anko version implementation org jetbrains anko anko appcompat v7 coroutines $anko version ``` No kotlin coroutine here is it fine

gildor · Answer

It s fine but you use transitive version of kotlinx coroutines I would just remove `org jetbrains anko anko coroutines` and add ``` implementation org jetbrains kotlinx kotlinx coroutines core 0 22 5 compile org jetbrains kotlinx kotlinx coroutines android 0 22 5 ```

gildor · Answer

If you use `bg` or `asReference` just copy them to your project

gildor · Answer

asReference actually would be helpful for your case because looks like your blocking network request is non cancellable to avoid memory leasks

albertgao · Answer

Really thanks 1 For that gradle could I remove that `anko sdk25 coroutines` and `anko appcompat v7 coroutines` With just use the two you mentoined 2 Every time I need to invoke some methods from activity class inside a coroutine if my API doesn t support cancellation which is exactly my case I should use the `asReference ` as a bridge to invoke activity methods to avoid mem leak right

gildor · Answer

Yes you can try depends which APIs of anko you use You can keep using them just update Kotlin dependency add them explicitly