Flutter蓝牙通信插件rtk_bluetooth的使用

rtk_bluetooth 插件用于经典蓝牙连接支持NMEA语句输出的RTK设备，例如合众思壮、中海达等厂商的产品。

使用方法

以下是一个完整的示例代码，展示如何在Flutter应用中使用 rtk_bluetooth 插件进行蓝牙通信。

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

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

class App extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      routes: {
        "/": (context) => const MyApp(),
      },
    );
  }
}

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List<String> list = [];
  bool isConnected = false;

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('经典蓝牙'),
          actions: [
            TextButton(
                onPressed: () {
                  if (isConnected) {
                    RtkBluetooth.close(callBack: (data) {
                      setState(() {
                        isConnected = false;
                      });
                    });
                  } else {
                    initBlueTooth();
                  }
                },
                child: Text(!isConnected ? "连接" : "断开",
                    style: const TextStyle(
                      color: Colors.white,
                    ))),
            TextButton(
                onPressed: () {
                  showAboutDialog(
                      context: context,
                      children: [SelectableText(list.join("|"))]);
                },
                child: const Text("导出",
                    style: TextStyle(
                      color: Colors.white,
                    )))
          ],
        ),
        body: Center(
          child: ListView(
            children: list
                .map((e) => ListTile(
                      title: Text(e),
                    ))
                .toList(),
          ),
        ),
      ),
    );
  }

  initBlueTooth() async {
    var nema = NmeaUitls(locationCallBack: (location) {
      print(location);
    });
    List<DeviceInfo> devices = await RtkBluetooth.getBondDevices;
    // 直接使用第一个已配对的设备
    RtkBluetooth.connect(
        callBack: (info) {
          print(info);
          setState(() {
            isConnected = true;
          });
        },
        address: devices.first.address!);
    RtkBluetooth.onNmeaChange.listen((event) {
      print(event);
      list.insert(0, event);

      setState(() {});
      nema.handleNmea(event);
    });
  }
}

代码说明

1. 导入必要的包：

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

2. 初始化应用：

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

3. 定义主应用类：

   class App extends StatelessWidget {
     @override
     Widget build(BuildContext context) {
       return MaterialApp(
         routes: {
           "/": (context) => const MyApp(),
         },
       );
     }
   }
   

4. 定义状态管理类：

   class MyApp extends StatefulWidget {
     const MyApp({Key? key}) : super(key: key);
   
     @override
     State<MyApp> createState() => _MyAppState();
   }
   
   class _MyAppState extends State<MyApp> {
     List<String> list = [];
     bool isConnected = false;
   
     @override
     void initState() {
       super.initState();
     }
   
     @override
     Widget build(BuildContext context) {
       return MaterialApp(
         home: Scaffold(
           appBar: AppBar(
             title: const Text('经典蓝牙'),
             actions: [
               TextButton(
                   onPressed: () {
                     if (isConnected) {
                       RtkBluetooth.close(callBack: (data) {
                         setState(() {
                           isConnected = false;
                         });
                       });
                     } else {
                       initBlueTooth();
                     }
                   },
                   child: Text(!isConnected ? "连接" : "断开",
                       style: const TextStyle(
                         color: Colors.white,
                       ))),
               TextButton(
                   onPressed: () {
                     showAboutDialog(
                         context: context,
                         children: [SelectableText(list.join("|"))]);
                   },
                   child: const Text("导出",
                       style: TextStyle(
                         color: Colors.white,
                       )))
             ],
           ),
           body: Center(
             child: ListView(
               children: list
                   .map((e) => ListTile(
                         title: Text(e),
                       ))
                   .toList(),
             ),
           ),
         ),
       );
     }
   }
   

5. 初始化蓝牙连接：

   initBlueTooth() async {
     var nema = NmeaUitls(locationCallBack: (location) {
       print(location);
     });
     List<DeviceInfo> devices = await RtkBluetooth.getBondDevices;
     // 直接使用第一个已配对的设备
     RtkBluetooth.connect(
         callBack: (info) {
           print(info);
           setState(() {
             isConnected = true;
           });
         },
         address: devices.first.address!);
     RtkBluetooth.onNmeaChange.listen((event) {
       print(event);
       list.insert(0, event);
   
       setState(() {});
       nema.handleNmea(event);
     });
   }