Android kotlin - ListView OnItemClickListener example

A Listview Android is an adapter view that does not know the details, such as type and contents, of the views it contains. Instead list view requests views on demand from a ListAdapter as needed, such as to display new views as the user scrolls up or down.

MainActivity.kt

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val list = mutableListOf(
            "African violet",
            "Alloy orange",
            "Amaranth pink",
            "Apple green",
            "Beau blue",
            "Black chocolate"
        )
        val adapter = ArrayAdapter<String>(
            this,
            android.R.layout.simple_list_item_1,list
        )
        listView.adapter = adapter
        listView.onItemClickListener = OnItemClickListener {
                parent, view, position, id ->
            val selectedItemText = parent.getItemAtPosition(position)
            textView.text = "Selected : $selectedItemText"
        }
    }
}

activity_main.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:id="@+id/constraintLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <ListView
        android:id="@+id/listView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <com.google.android.material.textview.MaterialTextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="16dp"
        android:textAppearance=
            "@style/TextAppearance.MaterialComponents.Subtitle1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        tools:text="TextView" />
</androidx.constraintlayout.widget.ConstraintLayout>