AppCompat DayNight theme not work on Android 6.0?

Question

I am using the new Theme.AppCompat.DayNight added in Android Support Library 23.2

On Android 5.1 it works well.

On Android 6.0, act

Answer 1

The best solution is to update context with proper config. Here is a snippet of what I do:

public Context setupTheme(Context context) {

    Resources res = context.getResources();
    int mode = res.getConfiguration().uiMode;
    switch (getTheme(context)) {
        case DARK:
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
            mode = Configuration.UI_MODE_NIGHT_YES;
            break;
        case LIGHT:
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
            mode = Configuration.UI_MODE_NIGHT_NO;
            break;
        default:
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_AUTO);
            break;
    }

    Configuration config = new Configuration(res.getConfiguration());
    config.uiMode = mode;
    if (Build.VERSION.SDK_INT >= 17) {
        context = context.createConfigurationContext(config);
    } else {
        res.updateConfiguration(config, res.getDisplayMetrics());
    }
    return context;
}

Then use the context in your Application like so

@Override
protected void attachBaseContext(Context base) {
    Context context = ThemePicker.getInstance().setupTheme(base);
    super.attachBaseContext(context);
}