Flutter手写识别插件flutter_myscript的使用

在本教程中，我们将展示如何在Flutter应用程序中使用flutter_myscript插件来实现手写识别功能。该插件允许用户通过手写输入来识别文本。

使用步骤

1. 添加依赖

首先，在你的pubspec.yaml文件中添加flutter_myscript作为依赖项：

dependencies:
  flutter_myscript: ^版本号

然后运行以下命令以获取依赖项：

flutter pub get

2. 初始化插件

在main.dart文件中初始化插件并设置状态变量：

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

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

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _platformVersion = 'Unknown';

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

  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await FlutterMyscript.getPlatformVersion();
    } catch (e) {
      platformVersion = 'Failed to get platform version.';
    }
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter MyScript Example'),
      ),
      body: Center(
        child: Text('Running on: $_platformVersion\n'),
      ),
    );
  }
}

3. 请求权限

在使用手写识别功能之前，你需要请求必要的权限（如相机或照片库访问权限）：

Future<void> requestPermission() async {
  final status = await GetPermission.camera.request();
  if (status == GetPermissionStatus.granted) {
    print('Camera permission granted');
  } else {
    print('Camera permission not granted');
  }
}

4. 检查权限状态

检查权限是否已被授予：

Future<void> checkPermission() async {
  final status = await GetPermission.camera.status;
  if (status == GetPermissionStatus.granted) {
    print('Camera permission is granted');
  } else {
    print('Camera permission is not granted');
  }
}

5. 手写识别功能

使用flutter_myscript进行手写识别的具体实现如下：

Future<void> textRecognition() async {
  FilePickerResult? result = await FilePicker.platform.pickFiles(
    type: FileType.custom,
    allowedExtensions: ['jpg', 'jpeg', 'png'],
  );

  if (result != null && result.files.isNotEmpty) {
    String imagePath = result.files.first.path!;
    await MaskController()
        .processImage(imagePath: imagePath)
        .then((value) {
      print('Recognition Result: $value');
    });
  }
}

6. 完整示例代码

以下是完整的示例代码，展示了如何集成上述所有功能：

import 'package:file_picker/file_picker.dart';
import 'package:flutter/material.dart';
import 'package:flutter_myscript/flutter_myscript.dart';

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

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

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  [@override](/user/override)
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  String _platformVersion = 'Unknown';
  String _permissionStatus = 'Not Checked';

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

  Future<void> initPlatformState() async {
    String platformVersion;
    try {
      platformVersion = await FlutterMyscript.getPlatformVersion();
    } catch (e) {
      platformVersion = 'Failed to get platform version.';
    }
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  Future<void> requestPermission() async {
    final status = await GetPermission.camera.request();
    setState(() {
      _permissionStatus = status == GetPermissionStatus.granted
          ? 'Permission Granted'
          : 'Permission Not Granted';
    });
  }

  Future<void> checkPermission() async {
    final status = await GetPermission.camera.status;
    setState(() {
      _permissionStatus = status == GetPermissionStatus.granted
          ? 'Permission Granted'
          : 'Permission Not Granted';
    });
  }

  Future<void> textRecognition() async {
    FilePickerResult? result = await FilePicker.platform.pickFiles(
      type: FileType.custom,
      allowedExtensions: ['jpg', 'jpeg', 'png'],
    );

    if (result != null && result.files.isNotEmpty) {
      String imagePath = result.files.first.path!;
      await MaskController()
          .processImage(imagePath: imagePath)
          .then((value) {
        print('Recognition Result: $value');
      });
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Flutter MyScript Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text('Running on: $_platformVersion\n'),
            ElevatedButton(
              onPressed: requestPermission,
              child: Text('Request Camera Permission'),
            ),
            SizedBox(height: 20),
            Text(_permissionStatus),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: checkPermission,
              child: Text('Check Camera Permission'),
            ),
            SizedBox(height: 20),
            ElevatedButton(
              onPressed: textRecognition,
              child: Text('Handwriting Recognition'),
            ),
          ],
        ),
      ),
    );
  }
}