Flutter屏幕管理与扩展功能插件screen_plus的使用

screen_plus 插件简介

screen_plus 是一个用于 Flutter 的屏幕管理和扩展功能的插件。它支持 Android 和 iOS 平台，并提供了多种屏幕控制功能。

使用说明

在 pubspec.yaml 文件中添加以下依赖：

dependencies:
  screen_plus: ^版本号

确保在 Android 的 AndroidManifest.xml 文件中添加以下权限：

<uses-permission android:name="android.permission.WAKE_LOCK" />

示例代码

以下是一个完整的示例代码，展示了如何使用 screen_plus 插件来管理屏幕亮度和保持屏幕常亮的功能。

示例代码

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:screen_plus/screen_plus.dart';

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;
  double? brightnessValue;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            CupertinoButton(
              child: const Text('点亮屏幕'),
              onPressed: () async {
                var status = await ScreenPlus.getBrightnessStatus();
                // 打印当前屏幕状态
                print(status);
                if (brightnessValue != null) {
                  ScreenPlus.setBrightness(brightnessValue!);
                }
                setState(() {});
              },
            ),
            CupertinoButton(
              child: const Text('降低屏幕亮度'),
              onPressed: () async {
                double brightness = await ScreenPlus.brightness();
                brightnessValue = brightness;
                ScreenPlus.setBrightness(0);
                setState(() {});
              },
            ),
            CupertinoButton(
              child: const Text('设置屏幕为常亮'),
              onPressed: () async {
                ScreenPlus.setScreenWake(true);
                setState(() {});
              },
            ),
            CupertinoButton(
              child: const Text('设置屏幕为非常亮'),
              onPressed: () async {
                ScreenPlus.setScreenWake(false);
                setState(() {});
              },
            ),
            Text(
              '当前亮度值：$brightnessValue',
              style: Theme.of(context).textTheme.headline4,
            ),
            FutureBuilder(
              builder: (BuildContext context, AsyncSnapshot<bool> snapshot) {
                if (snapshot.connectionState == ConnectionState.waiting) {
                  return Text("获取当前屏幕状态ing");
                } else if (snapshot.connectionState == ConnectionState.done) {
                  var currentData = snapshot.data;
                  return Text("当前屏幕状态$currentData");
                } else {
                  return Text("获取当前屏幕状态ing");
                }
              },
              future: _fetchLightStatus(),
              initialData: true,
            )
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.brightness_high),
      ),
    );
  }

  Future<bool> _fetchLightStatus() async {
    return await ScreenPlus.getBrightnessStatus();
  }
}

功能说明

1. 获取当前亮度：

   double brightness = await ScreenPlus.brightness();
   

2. 设置亮度：

   ScreenPlus.setBrightness(0.5);
   

3. 检查屏幕是否常亮：

   bool isKeptOn = await ScreenPlus.getBrightnessStatus;
   

4. 保持屏幕常亮：

   ScreenPlus.setScreenWake(true);
   

5. 取消屏幕常亮：

   ScreenPlus.setScreenWake(false);