Android, Type argument listadapter

Question

so i'm following a guide online to make a room db. In the adapter section i followed his way of doing it but when i did it, i keep having the "No Type Argument expected for Interface ListAdapter".

Error example: https://imgur.com/kPT7DkE

Here's the whole project so far on github.

https://github.com/OlivierLabelle/BudgetProject/tree/master/app/src/main/java/com/example/android/budgetproject

And the guide i was following.

https://medium.com/@trionkidnapper/recyclerview-more-animations-with-less-code-using-support-library-listadapter-62e65126acdb

Answer 1

So with the help of devboi, i found out i was using the wrong import.

In the top right corner on the Dev documentation it show the right import.

https://imgur.com/vGrCOVd

And here how the import on my project should look like.

import android.support.v7.recyclerview.extensions.ListAdapter

Answer 2

Just came across this very problem myself.

If you're using AndroidX/Jetpack/whatever the official name is I'm still new at this, Android Studio might
import android.widget.ListAdapter
automatically, but the one you want is
import androidx.recyclerview.widget.ListAdapter