Flutter血氧仪数据获取插件flutter_oximeter的使用

Flutter血氧仪数据获取插件flutter_oximeter的使用

获取开始

该项目目前处于依赖阶段，请参阅示例以了解如何使用它。

示例代码

以下是一个完整的示例代码，展示如何使用flutter_oximeter插件来连接和读取血氧仪数据。该插件主要用于Android设备，iOS设备的支持将在未来推出。

import 'package:flutter/material.dart';
import 'package:flutter_bluetooth_serial/flutter_bluetooth_serial.dart';
import 'dart:async';
import 'package:flutter_oximeter/flutter_oximeter.dart';
import 'package:permission_handler/permission_handler.dart';

import 'location_service.dart';

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

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

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

class _MyAppState extends State<MyApp> {
  bool isScanning = false;
  bool isConnected = false;

  FlutterOximeter oxi = FlutterOximeter();

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

  // 平台消息是异步的，所以我们初始化在一个异步方法中。
  Future<void> initPlatformState() async {
    oxi.getScanningStateStream.listen((event) {
      print('My Scanning State ' + event.toString());
      isScanning = event;
      setState(() {});
    });

    oxi.getConnectionStateStream.listen((event) {
      isConnected = event;
      setState(() {});
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
        ),
        body: Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Text(isConnected ? '已连接' : '未连接',
                  style: TextStyle(
                    color: isConnected ? Colors.green : Colors.red,
                  )),

              StreamBuilder<DeviceData>(
                  stream: oxi.deviceFoundStream,
                  builder: (context, snapshot) {
                    return snapshot.data == null
                        ? const Text('未找到设备')
                        : Column(
                            children: [
                              Text((snapshot.data!.deviceName ?? '0').toString()),
                              Text((snapshot.data!.macAddress ?? '0').toString()),
                              TextButton(
                                onPressed: () {
                                  oxi.connect(
                                      macAddress: snapshot.data!.macAddress ?? '',
                                      deviceName: snapshot.data!.deviceName ?? '');
                                },
                                child: const Text('连接'),
                              ),
                              TextButton(
                                onPressed: () {
                                  oxi.disconnect(
                                      macAddress: snapshot.data!.macAddress ?? '');
                                },
                                child: const Text('断开连接'),
                              ),
                            ],
                          );
                  }),

              const SizedBox(height: 10),
              StreamBuilder<OximeterData>(
                  stream: oxi.detectedDataStream,
                  builder: (context, snapshot) {
                    return snapshot.data == null
                        ? const Text('暂无数据')
                        : Column(
                            children: [
                              Text((snapshot.data!.spo2 ?? '0').toString()),
                              Text((snapshot.data!.heartRate ?? '0').toString()),
                              Text((snapshot.data!.hrv ?? '0').toString()),
                              Text((snapshot.data!.perfusionIndex?.toStringAsFixed(2)) ?? ''),
                            ],
                          );
                  }),
              isScanning
                  ? const CircularProgressIndicator()
                  : TextButton(
                      onPressed: () async {
                        startScan();
                      },
                      child: const Text('开始扫描'),
                    ),
            ],
          ),
        ),
      ),
    );
  }

  void startScan() async {
    bool locationEnable = await LocationService().enableGPS();
    await FlutterBluetoothSerial.instance.requestEnable();
    await Permission.location.request();

    if (locationEnable) {
      bool bluetoothEnable = (await FlutterBluetoothSerial.instance.isEnabled) ?? false;

      if (bluetoothEnable) {
        if (await Permission.location.isGranted) {
          oxi.startScanDevice();
        } else {
          alertToast(context, '位置权限是必须的以使用此功能');
        }
      } else {
        alertToast(context, '请开启蓝牙以使用此功能');
      }
    } else {
      alertToast(context, '请开启位置服务以使用此功能');
    }
  }
}