handlePlatformBrightnessChanged method

  1. @override
void handlePlatformBrightnessChanged()
override

Called when the platform brightness changes.

The current platform brightness can be queried from a Flutter binding or from a MediaQuery widget. The latter is preferred from widgets because it causes the widget to be automatically rebuilt when the brightness changes.

Querying MediaQuery.platformBrightnessOf directly. Preferred.
link 
final Brightness brightness = MediaQuery.platformBrightnessOf(context);

Querying PlatformDispatcher.platformBrightness.
link 
final Brightness brightness = WidgetsBinding.instance.platformDispatcher.platformBrightness;

See dart:ui.PlatformDispatcher.onPlatformBrightnessChanged.

Implementation

@override
void handlePlatformBrightnessChanged() {
  super.handlePlatformBrightnessChanged();
  for (final WidgetsBindingObserver observer in List<WidgetsBindingObserver>.of(_observers)) {
    observer.didChangePlatformBrightness();
  }
}