Spinner & kotlin

fragment_test.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    
    <Spinner
        android:id="@+id/picker"
        android:layout_width="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_height="wrap_content"/>

</androidx.constraintlayout.widget.ConstraintLayout>

TestFragment.kt

class TestFragment : Fragment(), AdapterView.OnItemSelectedListener {

    override fun onNothingSelected(parent: AdapterView<*>?) {
        Logger.v(TAG, "onItemSelected onNothingSelected")
    }

    override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
        Logger.v(TAG, "onItemSelected position=$position")
    }

    private val endPointSelectionListener = object : AdapterView.OnItemSelectedListener {
        override fun onNothingSelected(parent: AdapterView<*>?) {
            Logger.v(TAG, "onItemSelected onNothingSelected")
        }

        override fun onItemSelected(parent: AdapterView<*>?, view: View?, position: Int, id: Long) {
            Logger.v(TAG, "onItemSelected position=$position")
        }
    }
  
    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
        return inflater.inflate(R.layout.fragment_test, container, false)
    }
  
    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        logv("onItemSelected set")
        val adapter = ArrayAdapter.createFromResource(context, R.array.endpoints, android.R.layout.simple_spinner_item)
        picker.adapter = adapter
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
//        endpoint_picker.onItemSelectedListener = this
        picker.onItemSelectedListener = endPointSelectionListener
    }
}