如何在AndroidApp上自动切换到暗色模式？

Answer 1

也许您可以看看AppCompatDelegate.setDefaultNightMode（）

您只需用daynight的父级定义主题：

<style name="MyTheme" parent="Theme.AppCompat.DayNight">    
<!-- Blah blah -->
</style>

每种样式都带有：

<style name="Theme.AppCompat.DayNight" 
       parent="Theme.AppCompat.Light" />

<style name="Theme.AppCompat.DayNight" 
       parent="Theme.AppCompat" />

MODE_NIGHT_NO. Always use the day (light) theme.
MODE_NIGHT_YES. Always use the night (dark) theme.
MODE_NIGHT_FOLLOW_SYSTEM (default). This setting follows the system’s setting, which on Android Q and above is a system setting (more on this below).
MODE_NIGHT_AUTO_BATTERY. Changes to dark when the device has its ‘Battery Saver’ feature enabled, light otherwise.
MODE_NIGHT_AUTO_TIME & MODE_NIGHT_AUTO. Changes between day/night based on the time of day.

public class MyApplication extends Application {

    public void onCreate() {
        super.onCreate();        
        AppCompatDelegate.setDefaultNightMode(
            AppCompatDelegate.MODE_NIGHT_YES);
    }
}