Detecting deivces night mode programmatically

DetectingNightMode.kt

// check device state is in dark mode
val isDarkMode = this@BaseActivity.resources.configuration.uiMode
    .and(Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES

// retrieve current themes background color
val typedValue = TypedValue()
this@BaseActivity.theme.resolveAttribute(android.R.attr.colorBackground, typedValue, true)

// allow activity can update system system bars
this@BaseActivity.window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS)

// apply system StatusBar/NavigationBar color based on background color
this@BaseActivity.window.statusBarColor = typedValue.data
this@BaseActivity.window.navigationBarColor = typedValue.data

// for Day mode, make light system bars to make dark content visible on light background color.
if (!isDarkMode) {
    this@BaseActivity.window.decorView.systemUiVisibility =
        View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR or View.SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR
}