Kotlin extension functions unresolved reference : navGraphViewModels

Question

I am trying to convert some part my code from java to kotlin. Currently, I am facing a problem. To scope a viewmodel to NavGrap im using

private val mPrintsViewModel : PrintsViewModel by navGraphViewModels(R.id.nav_print)

It compiles fine. But I get an error while running the app.

Unresolved reference: navGraphViewModels

I viewed several solutions like

Add following lines to gradle

    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
    
    apply plugin: 'kotlin-android'
    apply plugin: 'kotlin-android-extensions'

Clear cache and restart
Verify if the IDE kotlin version matches with the project kotlin version.

None of the above solutions work.

This issue happens for all kotlin extension functions.

I am using kotlin-1.4.10

Similar question : Question 1, Question 2

Check the code is actually in a Fragment. You cannot access it from an Activity etc. — tagy22, Apr 04 '22 at 11:13

score 1 · Answer 1 · answered Nov 04 '20 at 17:35

1

The navGraphViewModels property delegate is part of the navigation-fragment-ktx dependency. It isn't part of Kotlin, nor part of the kotlin-android or kotlin-android-extensions plugins.

Make sure your dependencies block has a dependency on navigation-fragment-ktx (and specifically not just navigation-fragment.

answered Nov 04 '20 at 17:35

ianhanniballake

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Thanks for the reply. Yes, it has the dependency ``` implementation "androidx.navigation:navigation-fragment-ktx:2.3.1" ``` – Saravana Gunaseelan Nov 04 '20 at 17:46

Kotlin extension functions unresolved reference : navGraphViewModels

1 Answers1