CODEWITHSUNDEEP
androidandroid-studiokotlin
user1725145
user1725145

Reputation: 4042

Android Studio 3.4.1, Kotlin "unresolved reference: mutableListOf"

I am building an AAR with Kotlin in Android Studio 3.4.1, and I get the dreaded "unresolved reference" error when I try to use mutableListOf.

 val myBuffer: mutableListOf<Byte>()

I updated Kotlin to the latest version at the time of writing enter image description here

In build.gradle, the Kotlin version is also consistently defined. kotlinversion

In the module build.gradle, the following plugins are used:

apply plugin: 'com.android.library'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

I understood from what I read, that the Kotlin language plugin, including collection classes, should be automatically included in Android Studio. In any case, I'm using other Kotlin classes, e.g. ByteArray, without a problem.

Following advice that I found online, I cleaned and re-built, also selected File | Invalidate Caches/Restart and re-built. It did not work; the reference is still unresolved.

The Kotlin documentation doesn't say that this function is deprecated, which was another possible cause that I found.

What am I missing?

Upvotes: 6

Views: 9620

Answers (3)

ds0218
ds0218

Reputation: 31

lates version:

val myBuffer: MutableList<Byte> = mutableListOf()

mutableListOf <> ()

Upvotes: 0

Hor Chanpheng
Hor Chanpheng

Reputation: 871

Unresolved reference of mutableListOf or MutableList please try to implement this dependency:

implementation 'androidx.core:core-ktx:$kotlin_version'

Upvotes: 1

S-Sh
S-Sh

Reputation: 3893

You have made some typo error: use = and not ::

 val myBuffer = mutableListOf<Byte>()

or specify type explicitly:

 val myBuffer: MutableList<Byte> = mutableListOf<>()

Upvotes: 12

Related Questions