kotlin unresolved reference none of the following candidates is applicable because of receiver type mismatch

Question

HandleAPIError in Utils class. create custom method for Snackbar for the API Error.

Unresolved reference. None of the following candidates is applicable because of receiver type mismatch: public fun View.snackbar(message: String, action: (() → Unit)? = ...): Unit defined in file Utils.kt

Receiver type in Fragment in requireview(). which receiver type used for activity.

Utils.kt

fun View.snackbar(message: String, action: (() -> Unit)? = null){
    val snackbar = Snackbar.make(this, message, Snackbar.LENGTH_LONG)
    action?.let {
        snackbar.setAction("Retry"){
            it()
        }
        snackbar.show()
    }
}

fun Fragment.handleApiError(
    failure : Resource.Failure,
    retry : (() -> Unit)? = null
    ){
    when{
        failure.isNetworkError -> requireView().snackbar("Please check internet Connection", retry )
    }
}

fun Activity.handleApiError(
    failure : Resource.Failure,
    retry : (() -> Unit)? = null
){
    when{
        //which receiver type used for snackbar?
        failure.isNetworkError -> snackbar(
            "Please check internet Connection",
            retry
        )
}
}

Do you solution it? i have a sample problem, can you help me? — hungcuiga1

Nongthonbam Tonthoi Nongthonbam Tonthoi · Accepted Answer · 2021-02-07T04:41:15

Try using this.window.decorView.rootView as:

fun Activity.handleApiError(
        failure : Resource.Failure,
        retry : (() -> Unit)? = null
){
    when{
        //which receiver type used for snackbar?
        failure.isNetworkError -> this.window.decorView.rootView.snackbar(
                "Please check internet Connection",
                retry
        )
    }
}

kotlin unresolved reference none of the following candidates is applicable because of receiver type mismatch

1 Answers