Hide Keyboard in Android using Kotlin in 20 second

Write these extension function in utility class to hide the soft keyboard

fun Fragment.hideKeyboard() {
    view?.let { activity?.hideKeyboard(it) }
}

fun Activity.hideKeyboard() {
    hideKeyboard(currentFocus ?: View(this))
}

fun Context.hideKeyboard(view: View) {
    val inputMethodManager = getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
    inputMethodManager.hideSoftInputFromWindow(view.windowToken, 0)
}

Now use this method in your activity and fragment where you want hide keyboard.

hideKeyboard

This will close the keyboard regardless of your code either in dialog fragment and/or activity etc.