secugen_ble_plugin 是一个用于在 Flutter 应用中实现蓝牙通信的插件。它提供了一些基本的蓝牙功能，如扫描设备、连接设备、发送和接收数据等。以下是如何使用 secugen_ble_plugin 进行蓝牙通信的基本步骤。

1. 添加依赖

首先，你需要在 pubspec.yaml 文件中添加 secugen_ble_plugin 的依赖：

dependencies:
  flutter:
    sdk: flutter
  secugen_ble_plugin: ^0.0.1  # 请使用最新版本

然后运行 flutter pub get 来安装依赖。

2. 初始化插件

在你的 Dart 代码中，导入并初始化 secugen_ble_plugin：

import 'package:secugen_ble_plugin/secugen_ble_plugin.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  SecugenBlePlugin blePlugin = SecugenBlePlugin();
  runApp(MyApp(blePlugin: blePlugin));
}

3. 扫描蓝牙设备

使用 scanDevices 方法来扫描附近的蓝牙设备：

void scanDevices() async {
  List<BluetoothDevice> devices = await blePlugin.scanDevices();
  devices.forEach((device) {
    print('Device: ${device.name}, Address: ${device.address}');
  });
}

4. 连接蓝牙设备

使用 connect 方法来连接选定的蓝牙设备：

void connectToDevice(String deviceAddress) async {
  bool isConnected = await blePlugin.connect(deviceAddress);
  if (isConnected) {
    print('Connected to device');
  } else {
    print('Failed to connect to device');
  }
}

5. 发送数据

使用 sendData 方法向已连接的设备发送数据：

void sendDataToDevice(String data) async {
  bool isSent = await blePlugin.sendData(data);
  if (isSent) {
    print('Data sent successfully');
  } else {
    print('Failed to send data');
  }
}

6. 接收数据

使用 setOnDataReceivedListener 来监听从设备接收到的数据：

void setupDataListener() {
  blePlugin.setOnDataReceivedListener((String data) {
    print('Received data: $data');
  });
}

7. 断开连接

使用 disconnect 方法来断开与设备的连接：

void disconnectDevice() async {
  bool isDisconnected = await blePlugin.disconnect();
  if (isDisconnected) {
    print('Disconnected from device');
  } else {
    print('Failed to disconnect');
  }
}

8. 处理权限和蓝牙状态

在 Android 和 iOS 上，蓝牙功能可能需要特定的权限。确保在 AndroidManifest.xml 和 Info.plist 中配置了必要的权限。

Android

在 AndroidManifest.xml 中添加以下权限：

<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>

iOS

在 Info.plist 中添加以下键值对：

<key>NSBluetoothAlwaysUsageDescription</key>
<string>We need access to Bluetooth to connect to devices.</string>
<key>NSBluetoothPeripheralUsageDescription</key>
<string>We need access to Bluetooth to connect to devices.</string>

9. 处理蓝牙开关状态

你可以在应用程序中检查蓝牙是否已启用，并提示用户打开蓝牙：

void checkBluetoothStatus() async {
  bool isBluetoothEnabled = await blePlugin.isBluetoothEnabled();
  if (!isBluetoothEnabled) {
    // 提示用户打开蓝牙
  }
}

10. 完整示例

以下是一个简单的 Flutter 应用程序示例，展示了如何使用 secugen_ble_plugin 进行蓝牙通信：

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

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  SecugenBlePlugin blePlugin = SecugenBlePlugin();
  runApp(MyApp(blePlugin: blePlugin));
}

class MyApp extends StatelessWidget {
  final SecugenBlePlugin blePlugin;

  MyApp({required this.blePlugin});

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

class BluetoothScreen extends StatefulWidget {
  final SecugenBlePlugin blePlugin;

  BluetoothScreen({required this.blePlugin});

  [@override](/user/override)
  _BluetoothScreenState createState() => _BluetoothScreenState();
}

class _BluetoothScreenState extends State<BluetoothScreen> {
  [@override](/user/override)
  void initState() {
    super.initState();
    setupDataListener();
  }

  void scanDevices() async {
    List<BluetoothDevice> devices = await widget.blePlugin.scanDevices();
    devices.forEach((device) {
      print('Device: ${device.name}, Address: ${device.address}');
    });
  }

  void connectToDevice(String deviceAddress) async {
    bool isConnected = await widget.blePlugin.connect(deviceAddress);
    if (isConnected) {
      print('Connected to device');
    } else {
      print('Failed to connect to device');
    }
  }

  void sendDataToDevice(String data) async {
    bool isSent = await widget.blePlugin.sendData(data);
    if (isSent) {
      print('Data sent successfully');
    } else {
      print('Failed to send data');
    }
  }

  void setupDataListener() {
    widget.blePlugin.setOnDataReceivedListener((String data) {
      print('Received data: $data');
    });
  }

  void disconnectDevice() async {
    bool isDisconnected = await widget.blePlugin.disconnect();
    if (isDisconnected) {
      print('Disconnected from device');
    } else {
      print('Failed to disconnect');
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Bluetooth Communication'),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: scanDevices,
              child: Text('Scan Devices'),
            ),
            ElevatedButton(
              onPressed: () => connectToDevice('DEVICE_ADDRESS'),
              child: Text('Connect to Device'),
            ),
            ElevatedButton(
              onPressed: () => sendDataToDevice('Hello, Bluetooth!'),
              child: Text('Send Data'),
            ),
            ElevatedButton(
              onPressed: disconnectDevice,
              child: Text('Disconnect'),
            ),
          ],
        ),
      ),
    );
  }
}