Not able to “findViewById” in Kotlin. Getting error “Type inference failed”

Question

Try something like:

val recyclerView = findViewById<RecyclerView>(R.id.recycler_view)

You can use Kotlin Android Extensions too for that. Check the doc here.
With it, you can call recycler_view directly in your code.

Kotlin Android Extensions:

In your app gradle.build add apply plugin: 'kotlin-android-extensions'
In your class add import for import kotlinx.android.synthetic.main.<layout>.* where <layout> is the filename of your layout.
That’s it, you can call recycler_view directly in your code.

How does it work? The first time that you call recycler_view, a call to findViewById is done and cached.