Screen Usage

Supported operating systems (as of September 10th 2018)

  • Android: ✔
  • iOS: ✖

Events

Registers the following events (also while the application is running in the background):

  • SCREEN_UNLOCKED
  • SCREEN_ON
  • SCREEN_OFF

Usage

class Class {
  Screen _screenListener = new Screen();
  ScreenEvent _screenEvent;
  StreamSubscription<ScreenEvent> _screenEventSubscription;
  
  ...
  
  void function() {
    ...
     _screenEventSubscription =
        _screenListener.screenEvents.listen((ScreenEvent event) {
          setState(() {
            _screenEvent = event;
            /// Use _screenEvent
          });
        });
     ...
  }
}

Libraries

screen_usage

Dart

dart:ui
Built-in types and core primitives for a Flutter application. [...]

Core

dart:async
Support for asynchronous programming, with classes such as Future and Stream. [...]
dart:collection
Classes and utilities that supplement the collection support in dart:core. [...]
dart:convert
Encoders and decoders for converting between different data representations, including JSON and UTF-8. [...]
dart:core
Built-in types, collections, and other core functionality for every Dart program. [...]
dart:developer
Interact with developer tools such as the debugger and inspector. [...]
dart:math
Mathematical constants and functions, plus a random number generator. [...]
dart:typed_data
Lists that efficiently handle fixed sized data (for example, unsigned 8 byte integers) and SIMD numeric types. [...]

VM

dart:io
File, socket, HTTP, and other I/O support for non-web applications. [...]
dart:isolate
Concurrent programming using isolates: independent workers that are similar to threads but don't share memory, communicating only via messages. [...]