CODEWITHSUNDEEP
asynchronouskotlincoroutine
essetwopoints
essetwopoints

Reputation: 11

Async Co-Routine in Kotlin

I never use async in Kotlin. I'm not sure whether I understand is correctly.

I need that the method buttonChange(result) wait the thread is finish, to obtain the result.

fun sendConnection(view: View) {

    var result = ""

    if (!connected) {

                async {

                    val runnable = Runnable()
                    {
                        result =  me.connect("connection")
                    }
                    val threadSend = Thread(runnable)
                    threadSend.start()
                    }
                    buttonChange(result)
                }

             catch (e: Exception) {}

        } else {

            try {

                async {

                    val runnable = Runnable()
                    {
                        result =  me.connect("disconnection")
                    }
                    val threadSend = Thread(runnable)
                    threadSend.start()
                }
                buttonChange(result)
        } catch (e: Exception) {

            }
}

Upvotes: 0

Views: 334

Answers (1)

tynn
tynn

Reputation: 39863

The pattern you should use is async/await.

It'll return a Deferred from async { } which you can use to call await() on. Since buttonChange seems to need the UI context, you might need to launch the coroutines as well.

launch(UI) {
    try {
        val result = async { me.connect("disconnection") }
        buttonChange(result.await())
    } catch (_: Exception) { }
}

You should not create a thread manually.

Upvotes: 2

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