Hello guys, first of all my apologies for my bad English :) I have an exception in my code, probably...

# coroutines

[Santiago Laport]

Hello guys, first of all my apologies for my bad English :)
I have an exception in my code, probably I need to do it in a better way but I dont know how yet.
I want to call a bunch of listeners of a library as a sequence, so I added a continuation in every callback

The code is more less like this:

fun method(){
    viewModelScope.launch {
        val result1 = getSomeData1()
        val result2 = getSomeData2()
        val result3=  getSomeData3()
        ...
    }
}

suspend fun getSomeData1() : String? = suspendCoroutine { continuation ->
    someInstance.addListener(SomeListener {
                continuation.resume(data)
            })
}
...

First time works well, but sometimes I need to execute again and I get the next exception:
IllegalStateException : Already resumed
this occurs in in the continuation.resume

[octylFractal]

can the listener be called more than once? if so, you need to prevent that

[octylFractal]

most likely you want to detach the listener before/after you resume the coroutine

[kevindmoore]

Every time you call getSomeData1, you are adding a new anonymous listener.

[Santiago Laport]

You are right guys, the problem was that the listener is called more than once for some reason, but removing the listener(as Octavia says) after the resume works well