Here is a Kotlin example of how to listen to keyboard keys for example Enter Key.

import android.os.Bundle
import android.widget.EditText
import androidx.appcompat.app.AppCompatActivity
import android.view.KeyEvent
import android.widget.Toast

class MainActivity : AppCompatActivity() {

    private lateinit var editText: EditText

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main) // Replace with your layout

        editText = findViewById(R.id.editText) // Replace with your EditText id

        // Set up the listener for the Enter key press
        editText.setOnKeyListener { _, keyCode, event ->
            if (keyCode == KeyEvent.KEYCODE_ENTER && event.action == KeyEvent.ACTION_DOWN) {
                // Perform your action here
                val text = editText.text.toString()
                Toast.makeText(this, "You entered: $text", Toast.LENGTH_SHORT).show()
                // Clear the EditText
                editText.setText("")
                return@setOnKeyListener true
            }
            false
        }
    }
}

1. Import necessary classes:

• android.view.KeyEvent for handling key events.
• android.widget.Toast for displaying a simple message.

1. Initialize the EditText:

• Get a reference to the EditText using findViewById().

1. Set up the listener:

• Use editText.setOnKeyListener() to attach a listener for key events.
• Inside the listener:
  • Check if the pressed key is KeyEvent.KEYCODE_ENTER and the action is KeyEvent.ACTION_DOWN (key pressed, not released).
  • If it is, perform your desired action. In this example:
  • Get the text from the EditText using editText.text.toString().
  • Display a Toast message showing the entered text.
  • Clear the EditText using editText.setText("").
  • Return true to consume the event, preventing the Enter key from performing its default action (moving to the next line).
• If the pressed key is not Enter or the action is not down, return false to let the system handle the event.