Listener for enter key input for EditText

EnterActionListener.kt

/**
 * Simple [TextView.OnEditorActionListener] implementation for handling IME action
 * @param onAction called when IME action selected or Enter is clicked
 */
class EnterActionListener(private val onAction: () -> Unit) : TextView.OnEditorActionListener {
    override fun onEditorAction(v: TextView?, actionId: Int, event: KeyEvent?): Boolean {
        // If triggered by an enter key, this is the event; otherwise, this is null.
        // if shift key is down, then we want to insert the '\n' char in the TextView;
        if (event == null || event.isShiftPressed) return false

        onAction()
        return true
    }
}

fun TextView.setOnEnterActionListener(onAction: () -> Unit) =
        this.setOnEditorActionListener(EnterActionListener(onAction))

// and use it like that
// editText.setOnEnterActionListener {
//     Toast.makeText(context, "Click", Toast.LENGTH_SHORT).show()
// }