Flutter截图检测插件screenshot_detect_plugin_flutter的使用

<screenshot_detect_plugin_flutter>是一个简单的包，用于检测用户的截屏操作，并获取Android和iOS设备上的截屏路径。

目录

• 开始使用
• Android配置
• iOS配置
• 使用方法
• 完整示例

开始使用

Android配置

1. 需要设置 minSdkVersion >= 26 和 targetSdk 33
2. 在 AndroidManifest.xml 中添加用户权限：

   <!-- For sdk < 33 -->
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
       android:maxSdkVersion="32" />
   <!-- For sdk >= 33 -->
   <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
   

3. 对于Android 10，需要在 AndroidManifest.xml 中添加 requestLegacyExternalStorage：

   <activity
       ....
       android:requestLegacyExternalStorage="true">
   </activity>
   

iOS配置

1. 需要设置 iOS > 14
2. 在 Info.plist 中添加 NSPhotoLibraryUsageDescription：

   <key>NSPhotoLibraryUsageDescription</key>
   <string>This app requires access to the photo library.</string>
   

使用方法

你可以通过调用 checkPermission 方法来检查和请求权限。

Future<void> _checkPermission() async {
  _screenshotDetect.checkPermission().then((isGranted) {
    if (isGranted == null || !isGranted) {
      _screenshotDetect.requestPermission();
    }
  });
}

创建一个 Screenshot stream 并监听回调路径：

Future<void> _listenScreenShot() async {
  _stream = _screenshotDetect.screenShotStream();

  _stream.listen((String? path) {
    print("这是一张截屏的路径！\n $path");
  }).onError((error) {
    print("发生了一些错误：\n $error");
  });
}

完整示例

以下是一个完整的示例，展示了如何使用该插件。

import 'package:flutter/material.dart';
import 'package:screenshot_detect_plugin_flutter/screenshot_detect.dart';

class MyApp extends StatefulWidget {
  [@override](/user/override)
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final ScreenshotDetect _screenshotDetect = ScreenshotDetect();
  late Stream<String?> _stream;
  String _platformVersion = '未知';

  [@override](/user/override)
  void initState() {
    super.initState();
    _checkPermission();
    _listenScreenShot();
  }

  Future<void> _checkPermission() async {
    _screenshotDetect.checkPermission().then((isGranted) {
      if (isGranted == null || !isGranted) {
        _screenshotDetect.requestPermission();
      }
    });
  }

  Future<void> _listenScreenShot() async {
    _stream = _screenshotDetect.screenShotStream();

    _stream.listen((String? path) {
      print("这是一张截屏的路径！\n $path");
    }).onError((error) {
      print("发生了一些错误：\n $error");
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('截屏示例应用'),
        ),
        body: SizedBox(
          width: double.infinity,
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            crossAxisAlignment: CrossAxisAlignment.center,
            children: [
              Text('运行在: $_platformVersion\n'),
              StreamBuilder<String?>(
                stream: _stream,
                builder: (_, AsyncSnapshot<String?> snapshot) {
                  if (snapshot.data == null) {
                    return const Text('现在就来截屏吧！');
                  }
                  return Column(
                    children: [
                      Text('${snapshot.data}'),
                      SizedBox(
                        width: 200,
                        height: 200,
                        child: Image.file(File(snapshot.data!)),
                      ),
                    ],
                  );
                },
              ),
            ],
          ),
        ),
      ),
    );
  }
}

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