Unresolved reference: viewModelScope - Kotlin Android

Question

I try to add viewModelScope to a basic viewModel but android studio doesn't recognize it.

I tried to change my gradle build file with some solution I found but nothing works.

Here an extract of my build.gradle app

implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0-alpha01"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-alpha01"
implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:1.0.0-alpha01"
kapt "androidx.lifecycle:lifecycle-compiler:2.2.0-alpha01"

When I type viewModelScope in my viewModel it say Unresolved reference: viewModelScope.

Answer 1

for now its in alpha, so please update your gradle to use the following dependencies:

implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0"

Answer 2

In my case i forgot to extends ViewModel in that class, the class you use for viewModelScope must be like yourModelClass : ViewModel() in kotlin and for java yourModelClass extends ViewModel

Hope its help

Answer 3

I've had the same issue and I've just imported: "androidx.navigation:navigation-fragment-ktx:2.2.0-rc03" "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-rc03" Even though I thought fragment-ktx was not really related. Took me a while to figure that out. Hope it helps!

Answer 4

Also check that you are in the correct file. I had the same problem for a moment and I came to this page, but later on, I realized I accidentally tried to run viewModelScope.launch on my Fragment.

viewModelScope.launch is only available in your ViewModels and lifecycleScope.launch in your lifecycle aware components.