dynamic_theme

Dynamically changing your theme without hassle

This packages manages changing your theme during runtime and persiting that theme.

I wrote a medium post about this, check it out here!

Include in your project

dependencies:
  dynamic_theme:
    git:
      url: git://github.com/Norbert515/dynamic_theme.git

run packages get and import it

import 'package:dynamic_theme/dynamic_theme.dart';

if you want the dialog:

import 'package:dynamic_theme/theme_switcher_widgets.dart';

If you are not able to import it, restart your IDE see: https://github.com/flutter/flutter/issues/17016

Usage

Wrap your material app like this:


class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new DynamicTheme(
      defaultBrightness: Brightness.light,
      data: (brightness) => new ThemeData(
        primarySwatch: Colors.indigo,
        brightness: brightness,
      ),
      themedWidgetBuilder: (context, theme) {
        return new MaterialApp(
          title: 'Flutter Demo',
          theme: theme,
          home: new MyHomePage(title: 'Flutter Demo Home Page'),
        );
      }
    );
  }
}

Change the theme like this:

  void changeBrightness() {
    DynamicTheme.of(context).setBrightness(Theme.of(context).brightness == Brightness.dark? Brightness.light: Brightness.dark);
  }
  
  void changeColor() {
    DynamicTheme.of(context).setThemeData(new ThemeData(
        primaryColor: Theme.of(context).primaryColor == Colors.indigo? Colors.red: Colors.indigo
    ));
  }

When changing the brightness with setBrightness, it is additionally stored in the shared preferences.

Also included

A dialog widget to change the brightness!

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing package code, view the documentation.

Libraries

dynamic_theme
theme_switcher_widgets

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. [...]