App crashing when updating listviews in Android Kotlin

My code below fails when I call adapter.notifyDataSetChanged(). I got this code from an example. Not important to the question but I am filling an editText box with a scanned barcode. I then try to add it to the listview. I want to keep adding barcodes to the listview.

From the stack trace I believe this is the error: FATAL EXCEPTION: main Process: com.example.barcodereaderwedge, PID: 31252 java.lang.IllegalStateException: ArrayAdapter requires the resource ID to be a TextView

class MainActivity : AppCompatActivity() {

    private lateinit var editText: EditText
    private lateinit var listView: ListView
    private lateinit var adapter: ArrayAdapter<String>
    private val itemList = mutableListOf<String>()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        enableEdgeToEdge()
        setContentView(R.layout.activity_main)
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
            val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
            insets
        }

        listView = findViewById(R.id.myListView)

        editText = findViewById(R.id.editTextText)
        editText.isFocusable = true
        editText.requestFocus()

        adapter = ArrayAdapter(this, R.layout.item_view, itemList)
        listView.adapter = adapter

        editText.addTextChangedListener(object : TextWatcher {
            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
                // This method is called before the text is changed.
            }

            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                // This method is called when the text is changed.
                //Toast.makeText(this@MainActivity, "Text changed: $s", Toast.LENGTH_SHORT).show()
            }

            override fun afterTextChanged(s: Editable?) {
                //just using a dummy value for testing
                val newItem = "test"
                if (newItem.isNotEmpty()) {
                    itemList.add("newItem")
                    adapter.notifyDataSetChanged()
                    editText.requestFocus()
                }
            }
        })
    }
}