How to get AppCompatDelegate current mode if default is auto

You can get the current mode using the following code,

int currentNightMode = getResources().getConfiguration().uiMode
        & Configuration.UI_MODE_NIGHT_MASK;
switch (currentNightMode) {
    case Configuration.UI_MODE_NIGHT_NO:
        // Night mode is not active, we're in day time
    case Configuration.UI_MODE_NIGHT_YES:
        // Night mode is active, we're at night!
    case Configuration.UI_MODE_NIGHT_UNDEFINED:
        // We don't know what mode we're in, assume notnight
}

The following article by Chris Banes explains it nicely.

If you are a kotlin developer, then you can use the code below to check which mode your app is in..

val mode = context?.resources?.configuration?.uiMode? and Configuration.UI_MODE_NIGHT_MASK
when (mode) {
    Configuration.UI_MODE_NIGHT_YES -> {}
    Configuration.UI_MODE_NIGHT_NO -> {}
    else -> {} //covers Configuration.UI_MODE_NIGHT_UNDEFINED
}

For more about the dark theme modes see;

https://github.com/googlesamples/android-DarkTheme/

Somehow @harshithdwivedi's answer didn't work for me when the night mode is set from inside the app (using AppCompatDelegate). Otherwise it works fine.

So I had to add some additional checks like this:

public static boolean isNightModeActive(Context context) {
    int defaultNightMode = AppCompatDelegate.getDefaultNightMode();
    if (defaultNightMode == AppCompatDelegate.MODE_NIGHT_YES) {
        return true;
    }
    if (defaultNightMode == AppCompatDelegate.MODE_NIGHT_NO) {
        return false;
    }

    int currentNightMode = context.getResources().getConfiguration().uiMode
            & Configuration.UI_MODE_NIGHT_MASK;
    switch (currentNightMode) {
        case Configuration.UI_MODE_NIGHT_NO:
            return false;
        case Configuration.UI_MODE_NIGHT_YES:
            return true;
        case Configuration.UI_MODE_NIGHT_UNDEFINED:
            return false;
    }
    return false;
}

More simple way...

val Context.isDarkMode
    get() = if (getDefaultNightMode() == MODE_NIGHT_FOLLOW_SYSTEM)
        resources.configuration.uiMode and UI_MODE_NIGHT_MASK == UI_MODE_NIGHT_YES
    else getDefaultNightMode() == MODE_NIGHT_YES