Flutter屏幕亮度控制插件screen_brightness

Flutter屏幕亮度控制插件screen_brightness_ios的使用

screen_brightness_ios 是一个iOS平台上的插件实现，用于控制屏幕亮度。该插件是被官方支持的（endorsed），这意味着你可以直接使用 screen_brightness 包，并且它将自动包含在你的应用中。

使用方法

首先，在你的项目中添加依赖项：

dependencies:
  screen_brightness: ^0.3.0

然后运行 flutter pub get 来获取新添加的依赖项。

接下来，我们通过一个完整的示例来展示如何使用这个插件来控制屏幕亮度。

示例代码

以下是一个完整的示例代码，展示了如何使用 screen_brightness_ios 插件来控制屏幕亮度。

import 'package:flutter/material.dart';
import 'package:screen_brightness_platform_interface/screen_brightness_platform_interface.dart';

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

class MyApp extends StatelessWidget {
  static final RouteObserver<Route> routeObserver = RouteObserver<Route>();

  const MyApp({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: const HomePage(),
      onGenerateRoute: (settings) {
        late final Widget page;
        switch (settings.name) {
          case HomePage.routeName:
            page = const HomePage();
            break;

          case ControllerPage.routeName:
            page = const ControllerPage();
            break;

          case RouteAwarePage.routeName:
            page = const RouteAwarePage();
            break;

          case BlankPage.routeName:
            page = const BlankPage();
            break;

          case SettingPage.routeName:
            page = const SettingPage();
            break;

          default:
            throw UnimplementedError('page name not found');
        }

        return MaterialPageRoute(
          builder: (context) => page,
          settings: settings,
        );
      },
      navigatorObservers: [
        routeObserver,
      ],
    );
  }
}

class HomePage extends StatelessWidget {
  static const routeName = '/home';

  const HomePage({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('屏幕亮度示例'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            FutureBuilder<double>(
              future: ScreenBrightnessPlatform.instance.application,
              builder: (context, snapshot) {
                double applicationBrightness = 0;
                if (snapshot.hasData) {
                  applicationBrightness = snapshot.data!;
                }

                return StreamBuilder<double>(
                  stream: ScreenBrightnessPlatform
                      .instance.onApplicationScreenBrightnessChanged,
                  builder: (context, snapshot) {
                    double changedApplicationBrightness = applicationBrightness;
                    if (snapshot.hasData) {
                      changedApplicationBrightness = snapshot.data!;
                    }

                    return Text(
                        '应用程序亮度 $changedApplicationBrightness');
                  },
                );
              },
            ),
            ElevatedButton(
              onPressed: () =>
                  Navigator.of(context).pushNamed(ControllerPage.routeName),
              child: const Text('控制器示例页面'),
            ),
            ElevatedButton(
              onPressed: () =>
                  Navigator.of(context).pushNamed(RouteAwarePage.routeName),
              child: const Text('路由感知示例页面'),
            ),
            ElevatedButton(
              onPressed: () =>
                  Navigator.of(context).pushNamed(SettingPage.routeName),
              child: const Text('设置页面'),
            ),
          ],
        ),
      ),
    );
  }
}

class ControllerPage extends StatefulWidget {
  static const routeName = '/controller';

  const ControllerPage({super.key});

  [@override](/user/override)
  State<ControllerPage> createState() => _ControllerPageState();
}

class _ControllerPageState extends State<ControllerPage> {
  Future<void> setSystemBrightness(double brightness) async {
    try {
      await ScreenBrightnessPlatform.instance
          .setSystemScreenBrightness(brightness);
    } catch (e) {
      debugPrint(e.toString());
      throw '设置系统亮度失败';
    }
  }

  Future<void> setApplicationBrightness(double brightness) async {
    try {
      await ScreenBrightnessPlatform.instance
          .setApplicationScreenBrightness(brightness);
    } catch (e) {
      debugPrint(e.toString());
      throw '设置应用程序亮度失败';
    }
  }

  Future<void> resetApplicationBrightness() async {
    try {
      await ScreenBrightnessPlatform.instance
          .resetApplicationScreenBrightness();
    } catch (e) {
      debugPrint(e.toString());
      throw '重置应用程序亮度失败';
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('控制器'),
      ),
      body: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          FutureBuilder<double>(
            future: ScreenBrightnessPlatform.instance.system,
            builder: (context, snapshot) {
              double systemBrightness = 0;
              if (snapshot.hasData) {
                systemBrightness = snapshot.data!;
              }

              return StreamBuilder<double>(
                  stream: ScreenBrightnessPlatform
                      .instance.onSystemScreenBrightnessChanged,
                  builder: (context, snapshot) {
                    double changedSystemBrightness = systemBrightness;
                    if (snapshot.hasData) {
                      changedSystemBrightness = snapshot.data!;
                    }
                    return Column(
                      mainAxisSize: MainAxisSize.min,
                      children: [
                        Text('系统亮度: $changedSystemBrightness'),
                        Slider.adaptive(
                          value: changedSystemBrightness,
                          onChanged: (value) {
                            setSystemBrightness(value);
                          },
                        ),
                      ],
                    );
                  });
            },
          ),
          FutureBuilder<double>(
            future: ScreenBrightnessPlatform.instance.application,
            builder: (context, snapshot) {
              double applicationBrightness = 0;
              if (snapshot.hasData) {
                applicationBrightness = snapshot.data!;
              }

              return StreamBuilder<double>(
                stream: ScreenBrightnessPlatform
                    .instance.onApplicationScreenBrightnessChanged,
                builder: (context, snapshot) {
                  double changedApplicationBrightness = applicationBrightness;
                  if (snapshot.hasData) {
                    changedApplicationBrightness = snapshot.data!;
                  }

                  return Column(
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      FutureBuilder<bool>(
                        future: ScreenBrightnessPlatform
                            .instance.hasApplicationScreenBrightnessChanged,
                        builder: (context, snapshot) {
                          return Text(
                              '应用程序亮度是否已更改: ${snapshot.data}');
                        },
                      ),
                      Text(
                          '应用程序亮度: $changedApplicationBrightness'),
                      Slider.adaptive(
                        value: changedApplicationBrightness,
                        onChanged: (value) {
                          setApplicationBrightness(value);
                        },
                      ),
                      ElevatedButton(
                        onPressed: () {
                          resetApplicationBrightness();
                        },
                        child: const Text('重置亮度'),
                      ),
                    ],
                  );
                },
              );
            },
          ),
        ],
      ),
    );
  }
}

class RouteAwarePage extends StatefulWidget {
  static const routeName = '/routeAware';

  const RouteAwarePage({super.key});

  [@override](/user/override)
  State<RouteAwarePage> createState() => _RouteAwarePageState();
}

class _RouteAwarePageState extends State<RouteAwarePage> with RouteAware {
  [@override](/user/override)
  void didChangeDependencies() {
    super.didChangeDependencies();
    MyApp.routeObserver.subscribe(this, ModalRoute.of(context)!);
  }

  [@override](/user/override)
  void dispose() {
    MyApp.routeObserver.unsubscribe(this);
    super.dispose();
  }

  [@override](/user/override)
  void didPush() {
    super.didPush();
    ScreenBrightnessPlatform.instance.setApplicationScreenBrightness(0.7);
  }

  [@override](/user/override)
  void didPushNext() {
    super.didPushNext();
    ScreenBrightnessPlatform.instance.resetApplicationScreenBrightness();
  }

  [@override](/user/override)
  void didPop() {
    super.didPop();
    ScreenBrightnessPlatform.instance.resetApplicationScreenBrightness();
  }

  [@override](/user/override)
  void didPopNext() {
    super.didPopNext();
    ScreenBrightnessPlatform.instance.setApplicationScreenBrightness(0.7);
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('路由感知'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () => Navigator.of(context).pushNamed(BlankPage.routeName),
          child: const Text('下一个页面'),
        ),
      ),
    );
  }
}

class BlankPage extends StatelessWidget {
  static const routeName = '/blankPage';

  const BlankPage({super.key});

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('空白页'),
      ),
    );
  }
}

class SettingPage extends StatefulWidget {
  static const routeName = '/setting';

  const SettingPage({super.key});

  [@override](/user/override)
  State<SettingPage> createState() => _SettingPageState();
}

class _SettingPageState extends State<SettingPage> {
  bool isAutoReset = true;
  bool isAnimate = true;
  bool canChangeSystemBrightness = true;

  [@override](/user/override)
  void initState() {
    super.initState();
    getIsAutoResetSetting();
    getIsAnimateSetting();
    getCanChangeSystemBrightness();
  }

  Future<void> getIsAutoResetSetting() async {
    final isAutoReset = await ScreenBrightnessPlatform.instance.isAutoReset;
    setState(() {
      this.isAutoReset = isAutoReset;
    });
  }

  Future<void> getIsAnimateSetting() async {
    final isAnimate = await ScreenBrightnessPlatform.instance.isAnimate;
    setState(() {
      this.isAnimate = isAnimate;
    });
  }

  Future<void> getCanChangeSystemBrightness() async {
    final canChangeSystemBrightness =
        await ScreenBrightnessPlatform.instance.canChangeSystemBrightness;
    setState(() {
      this.canChangeSystemBrightness = canChangeSystemBrightness;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('设置'),
      ),
      body: ListView(
        children: [
          ListTile(
            title: const Text('自动重置'),
            trailing: Switch(
              value: isAutoReset,
              onChanged: (value) async {
                await ScreenBrightnessPlatform.instance.setAutoReset(value);
                await getIsAutoResetSetting();
              },
            ),
          ),
          ListTile(
            title: const Text('动画效果'),
            trailing: Switch(
              value: isAnimate,
              onChanged: (value) async {
                await ScreenBrightnessPlatform.instance.setAnimate(value);
                await getIsAnimateSetting();
              },
            ),
          ),
          ListTile(
            title: const Text('可以改变系统亮度'),
            trailing: Switch(
              value: canChangeSystemBrightness,
              onChanged: (value) {},
            ),
          ),
        ],
      ),
    );
  }
}

更多关于Flutter屏幕亮度控制插件screen_brightness_ios的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

wuwangju 1楼•2 天前

更多关于Flutter屏幕亮度控制插件screen_brightness_ios的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

当然，以下是如何在Flutter应用中使用screen_brightness_ios插件来控制iOS设备屏幕亮度的代码示例。请注意，这个插件专门用于iOS设备，因此在Android上不会生效。

首先，确保你的Flutter项目已经添加了screen_brightness_ios插件。你可以在pubspec.yaml文件中添加以下依赖项：

dependencies:
  flutter:
    sdk: flutter
  screen_brightness_ios: ^0.0.5  # 请检查最新版本号

然后运行flutter pub get来安装依赖。

接下来，你需要编写一些Dart代码来调用这个插件的功能。以下是一个简单的示例，展示如何在Flutter应用中设置屏幕亮度：

import 'package:flutter/material.dart';
import 'package:screen_brightness_ios/screen_brightness_ios.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  double _brightness = 1.0; // 默认亮度为1.0（最大值）

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Screen Brightness Control'),
        ),
        body: Padding(
          padding: const EdgeInsets.all(16.0),
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Slider(
                value: _brightness,
                min: 0.0,
                max: 1.0,
                divisions: 10,
                onChanged: (value) {
                  setState(() {
                    _brightness = value;
                    // 更新屏幕亮度
                    _setScreenBrightness(_brightness);
                  });
                },
              ),
              SizedBox(height: 20),
              Text(
                'Current Brightness: $_brightness',
                style: TextStyle(fontSize: 20),
              ),
            ],
          ),
        ),
      ),
    );
  }

  Future<void> _setScreenBrightness(double brightness) async {
    if (Platform.isIOS) {
      try {
        // 设置屏幕亮度
        await ScreenBrightness.setBrightness(brightness);
      } catch (e) {
        print('Failed to set brightness: $e');
      }
    } else {
      print('This feature is only available on iOS.');
    }
  }
}

在这个示例中，我们创建了一个Flutter应用，其中包含一个滑动条（Slider）用于调整屏幕亮度。当用户滑动滑动条时，我们调用_setScreenBrightness函数来更新屏幕亮度。

请注意以下几点：

我们使用Platform.isIOS来检查当前平台是否为iOS，因为这个插件只支持iOS。
我们使用ScreenBrightness.setBrightness(brightness)方法来设置屏幕亮度。

确保在实际部署前测试代码，并处理可能出现的任何异常或错误情况。这个插件可能需要额外的权限或配置才能在真实设备上工作，因此请查阅插件的官方文档以获取更多信息。