recyclerview No adapter attached; skipping layout

Question

Just implemented RecyclerView in my code, replacing ListView.

Everything works fine. The data is displayed.

But error messages are

Answer 1

Adding yet another answer since I came across this thread googling the error. I was trying to initialize a PreferenceFragmentCompat but I forgot to inflate the preference XML in onCreatePreferences like this:

class SettingsFragment : PreferenceFragmentCompat() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val inflater = LayoutInflater.from(context)
        inflater.inflate(R.layout.fragment_settings, null)
    }

    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
        // Missing this line here:
        //   setPreferencesFromResource(R.xml.settings, rootKey)
    }
}

The error was a mystery until I realized that PreferenceFragmentCompat must be using a RecyclerView internally.