I’m not sure if this is a Kotlin question, an Andr...

# android

[Iain]

I’m not sure if this is a Kotlin question, an Android question, or a Retrofit question but here goes,

class GetCoordinatesApiManager: Callback<LocationResult> {

    var completionHandler: (flag:Boolean) -> Unit = {}

    fun getCoordinates(userIds: ArrayList<Int>, handler: (flag: Boolean) -> Unit) {
        completionHandler = handler
        ApiClient.apiInterface.getCoordinates(userIds, UserState.bearerToken!!).enqueue(this)
    }

Android Studio complains that this in enqueue(this) is Type Mismatch Required: Callback <LocationResult!>! Found: GetCoordinatesApiManager

[adam-mcneilly]

Just for kicks - did you triple check if it is importing the right callback class? I've been bit by this before when multiple libraries have a class named Callback.

[Iain]

Yeah, it’s importing retrofit2.Callback just like the other class. I’ve been bitten by that one already.

[Iain]

It seems to have something to do with the type in the callback

[Iain]

It’s in the ApiClient.apiInterface. It’s pulling in a Google UserLocation object instead of my UserLocation.

[Iain]

So it was importing the wrong class, after all. 😜

[adam-mcneilly]

nailed it 😜

[adam-mcneilly]

I just guessed the wrong one.

[Iain]

Yup. Thanks for pointing me in the right direction.

[adam-mcneilly]

No problem. A good chunk of software development is silly errors like this.

[louiscad]

@Iain Doesn't directly solve your problem, but can help: https://github.com/gildor/kotlin-coroutines-retrofit

[Katariya]

Thanks for your replies, I have made a mistake in model class. Actually I have copied param names from json2pojo and pojo param replace user_name to username.