Flutter主题动态切换插件flutter_dynamic_theme的使用

Flutter主题动态切换插件flutter_dynamic_theme的使用

简介

flutter_dynamic_theme插件允许您指定多个颜色主题，用户可以在其中选择。选定的主题在应用程序重启时会保留。

在项目中包含该插件

1. 在pubspec.yaml文件中添加依赖：

   dependencies:
     flutter_dynamic_theme: <lastedVersion>
   

2. 运行packages get命令并导入插件：

   import 'package:flutter_dynamic_theme/flutter_dynamic_theme.dart';
   

如果您需要显示对话框：

import 'package:flutter_dynamic_theme/theme_switcher_widgets.dart';

如果您需要颜色列表：

import 'package:flutter_dynamic_theme/dynamic_colors.dart';

以下是示例图片：

开始使用

以下是一个完整的示例代码，展示如何使用flutter_dynamic_theme插件：

import 'package:flutter/material.dart';

import 'package:flutter_dynamic_theme/flutter_dynamic_theme.dart';
import 'package:flutter_dynamic_theme/theme_switcher_widgets.dart';
import 'package:flutter_dynamic_theme/color_theme_dialog.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  @override
  Widget build(BuildContext context) {
    return FlutterDynamicTheme(
      // 默认亮度为亮色
      defaultBrightness: Brightness.light,
      // 根据亮度返回主题数据
      data: (Brightness brightness) => ThemeData(
        primarySwatch: Colors.indigo, // 主色调
        brightness: brightness, // 亮度
      ),
      loadBrightnessOnStart: true, // 启动时加载保存的亮度设置
      themedWidgetBuilder: (BuildContext context, ThemeData theme) {
        return MaterialApp(
          title: 'Flutter Dynamic Theme',
          theme: theme,
          home: MyHomePage(title: 'Flutter Dynamic Theme Home Page'),
        );
      },
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: FlutterDynamicTheme.of(context)?.toggleBrightness, // 切换亮度
              child: const Text('Toggle brightness'),
            ),
            ElevatedButton(
              onPressed: showChooser, // 显示亮度和颜色选择器
              child: const Text('Pop Up Change brightness'),
            ),
            const Divider(),
            ElevatedButton(
              onPressed: showActionsSettingsColorTheme, // 显示颜色选择器
              child: const Text('Change color'),
            ),
          ],
        ),
      ),
      bottomNavigationBar: BottomNavigationBar(
        items: const <BottomNavigationBarItem>[
          BottomNavigationBarItem(
            icon: Icon(Icons.insert_drive_file),
            label: 'Tab 1',
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.show_chart),
            label: 'Tab 2',
          ),
        ],
      ),
    );
  }

  // 显示颜色主题选择器
  showActionsSettingsColorTheme() {
    showDialog(
        context: context,
        barrierDismissible: true,
        builder: (BuildContext context) {
          return const ColorThemeDialog();
        });
  }

  // 显示亮度选择器
  void showChooser() {
    showDialog<void>(
      context: context,
      builder: (BuildContext context) {
        return BrightnessSwitcherDialog(
          activeToggleMode: true, // 激活亮度切换模式
          activeColor: true, // 激活颜色选项
          textDarkMode: 'Mode Dark :(', // 暗模式文本
          textLightMode: 'Light Mode :)', // 亮模式文本
          onSelectedTheme: (Brightness brightness) {
            FlutterDynamicTheme.of(context)?.setBrightness(brightness); // 设置亮度
          },
        );
      },
    );
  }
}

更改颜色主题

您可以使用以下方法更改颜色主题：

FlutterDynamicTheme.of(context)?.setThemeData(new ThemeData(primarySwatch: Colors.red));
// 或者
FlutterDynamicTheme.of(context)?.setThemeData(new ThemeData(primaryColor: Colors.red));

显示弹出窗口以同时更改亮度和颜色

void showChooser() {
    showDialog<void>(
      context: context,
      builder: (BuildContext context) {
        return BrightnessSwitcherDialog(
          activeToggleMode: true,
          activeColor: true, // 激活颜色选项
          textDarkMode: 'Mode Dark :(',
          textLightMode: 'Light Mode :)',
          onSelectedTheme: (Brightness brightness) {
            FlutterDynamicTheme.of(context)?.setBrightness(brightness);
          },
        );
      },
    );
}

激活颜色选项：

activeColor: true