fun hideKeybord() {

            val view = this.currentFocus

            if (view != null) {

                val hideKey = getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager

                hideKey.hideSoftInputFromWindow(view.windowToken, 0)

            } else {

                window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN)

            }

        }

​

// Call your function whatever you want

​

    hideKeybord() 

​