override fun onKeyUp(keyCode: Int, event: KeyEvent?): Boolean {
        hideSoftKeyboard()
        return super.onKeyUp(keyCode, event)
}

mEditText.setOnKeyListener { v, keyCode, event ->
       hideSoftKeyboard()
       return@setOnKeyListener when (keyCode) {
           KeyEvent.ACTION_UP -> {
               hideSoftKeyboard()
               true
           }
           else -> false
       }
}

fun hideSoftKeyboard() {
   try {
        val inputMethodManager = getSystemService(
            Activity.INPUT_METHOD_SERVICE
        ) as InputMethodManager
        inputMethodManager.hideSoftInputFromWindow(
            currentFocus!!.windowToken, 0)
    } catch (e: Exception) {}
}