when (this.resources?.configuration?.uiMode?.and(Configuration.UI_MODE_NIGHT_MASK)) {
    Configuration.UI_MODE_NIGHT_YES -> {
    //write code here for night mode
    }
    Configuration.UI_MODE_NIGHT_NO -> {
    //write code here for light mode
    }
    Configuration.UI_MODE_NIGHT_UNDEFINED -> {
      //write code here when undefined
    }
  }