Flutter插件flutter_aoi的使用_flutter_aoi主要用于蓝牙低功耗（BLE）设备的连接与数据交互

在本文中，我们将探讨一个名为flutter_aoi的未知功能插件，并通过一个完整的示例演示其潜在用途。此插件主要用于蓝牙低功耗（BLE）设备的连接与数据交互。

示例代码

以下是一个完整的示例代码，展示了如何使用flutter_aoi插件来发现、连接和读写BLE设备的特征值（characteristics）。

import 'dart:convert';
import 'dart:typed_data';

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

void main() {
  init();
}

Future<void> init() async {
  final adapters = await AoiAdapter.getAdapters(bridge: aoi);
  final adapter = adapters.first;

  final peripheral =
      await adapter.startScan().first.timeout(const Duration(seconds: 10));

  print('Found peripheral: ${peripheral.prettyPrint()}');

  print('Stopping scan...');
  await adapter.stopScan();
  print('Scan stopped');

  AoiConnectedPeripheral connectedPeripheral;
  try {
    print('Connecting...');
    connectedPeripheral =
        await peripheral.connect().timeout(const Duration(seconds: 10));
    print('Connected');
  } catch (e) {
    print('Could not connect: $e');
    return;
  }

  print(
      'connectedPeripheral characteristics: ${connectedPeripheral.characteristics}');

  for (final c in connectedPeripheral.characteristics) {
    print('Characteristic: ${c.prettyPrint()}');

    if (c.hasProperty(AoiCharacteristicProperty.read)) {
      print('Trying to read it...');
      try {
        final data = await connectedPeripheral
            .read(characteristic: c)
            .timeout(const Duration(seconds: 10));
        print('Data: $data');
        try {
          print('Data as string: ${const Utf8Decoder().convert(data)}');
        } catch (e) {
          print('Not a valid string');
        }
      } catch (e) {
        print('Error while reading characteristic: $e');
      }
    }

    if (c.hasProperty(AoiCharacteristicProperty.write)) {
      print('Trying to write it...');
      try {
        await connectedPeripheral
            .write(characteristic: c, data: Uint8List.fromList([0x42, 0x42]))
            .timeout(const Duration(seconds: 10));
      } catch (e) {
        print('Error while writing characteristic: $e');
      }
    }

    print('Trying to read it...');
    try {
      final data = await connectedPeripheral
          .read(characteristic: c)
          .timeout(const Duration(seconds: 10));
      print('Data: $data');
      try {
        print('Data as string: ${const Utf8Decoder().convert(data)}');
      } catch (e) {
        print('Not a valid string');
      }
    } catch (e) {
      print('Error while reading characteristic: $e');
    }
  }

  print('Disconnect');
  await connectedPeripheral.disconnect();

  print('Done');
}

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late Future<List<AoiPeripheral>> peripherals = Future(() => []);

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text("You're running on"),
            FutureBuilder<List<dynamic>>(
              future: Future.wait([peripherals]),
              builder: (context, snap) {
                final style = Theme.of(context).textTheme.headline4;
                if (snap.error != null) {
                  debugPrint(snap.error.toString());
                  return Tooltip(
                    message: snap.error.toString(),
                    child: Text('Unknown OS', style: style),
                  );
                }

                final data = snap.data;
                if (data == null) return const CircularProgressIndicator();

                return Text('');
              },
            )
          ],
        ),
      ),
    );
  }
}

代码解释

导入必要的库

import 'dart:convert';
import 'dart:typed_data';

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

初始化并启动扫描

void main() {
  init();
}

Future<void> init() async {
  final adapters = await AoiAdapter.getAdapters(bridge: aoi);
  final adapter = adapters.first;

  final peripheral =
      await adapter.startScan().first.timeout(const Duration(seconds: 10));

  print('Found peripheral: ${peripheral.prettyPrint()}');

  print('Stopping scan...');
  await adapter.stopScan();
  print('Scan stopped');

连接到设备并读取/写入特征值

  AoiConnectedPeripheral connectedPeripheral;
  try {
    print('Connecting...');
    connectedPeripheral =
        await peripheral.connect().timeout(const Duration(seconds: 10));
    print('Connected');
  } catch (e) {
    print('Could not connect: $e');
    return;
  }

  print(
      'connectedPeripheral characteristics: ${connectedPeripheral.characteristics}');

  for (final c in connectedPeripheral.characteristics) {
    print('Characteristic: ${c.prettyPrint()}');

    if (c.hasProperty(AoiCharacteristicProperty.read)) {
      print('Trying to read it...');
      try {
        final data = await connectedPeripheral
            .read(characteristic: c)
            .timeout(const Duration(seconds: 10));
        print('Data: $data');
        try {
          print('Data as string: ${const Utf8Decoder().convert(data)}');
        } catch (e) {
          print('Not a valid string');
        }
      } catch (e) {
        print('Error while reading characteristic: $e');
      }
    }

    if (c.hasProperty(AoiCharacteristicProperty.write)) {
      print('Trying to write it...');
      try {
        await connectedPeripheral
            .write(characteristic: c, data: Uint8List.fromList([0x42, 0x42]))
            .timeout(const Duration(seconds: 10));
      } catch (e) {
        print('Error while writing characteristic: $e');
      }
    }

    print('Trying to read it...');
    try {
      final data = await connectedPeripheral
          .read(characteristic: c)
          .timeout(const Duration(seconds: 10));
      print('Data: $data');
      try {
        print('Data as string: ${const Utf8Decoder().convert(data)}');
      } catch (e) {
        print('Not a valid string');
      }
    } catch (e) {
      print('Error while reading characteristic: $e');
    }
  }

断开连接并完成操作

  print('Disconnect');
  await connectedPeripheral.disconnect();

  print('Done');
}

创建Flutter应用

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late Future<List<AoiPeripheral>> peripherals = Future(() => []);

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text("You're running on"),
            FutureBuilder<List<dynamic>>(
              future: Future.wait([peripherals]),
              builder: (context, snap) {
                final style = Theme.of(context).textTheme.headline4;
                if (snap.error != null) {
                  debugPrint(snap.error.toString());
                  return Tooltip(
                    message: snap.error.toString(),
                    child: Text('Unknown OS', style: style),
                  );
                }

                final data = snap.data;
                if (data == null) return const CircularProgressIndicator();

                return Text('');
              },
            )
          ],
        ),
      ),
    );
  }
}

更多关于Flutter插件flutter_aoi的使用_flutter_aoi主要用于蓝牙低功耗（BLE）设备的连接与数据交互的实战教程也可以访问 https://www.itying.com/category-92-b0.html

bupafengyu 1楼

更多关于Flutter插件flutter_aoi的使用_flutter_aoi主要用于蓝牙低功耗（BLE）设备的连接与数据交互的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html

flutter_aoi 是一个尚未广泛流行或文档化的 Flutter 插件，因此其功能和用法可能不明确。不过，我们可以通过插件的名称、可能的关键词以及常见的 Flutter 插件开发模式来推测其潜在用途，并提供一些可能的使用场景。

1. 插件名称分析

flutter_aoi 中的 aoi 可能代表以下几种含义：

Area of Interest（兴趣区域）：可能用于处理地图、图像或特定区域的数据。
Application of Interest（应用兴趣）：可能用于管理应用内的特定功能或模块。
AI（Artificial Intelligence）：可能是一个拼写错误或缩写，用于人工智能相关的功能。

2. 潜在功能

基于上述推测，以下是 flutter_aoi 可能的功能：

地图或图像处理：如果 aoi 表示“兴趣区域”，插件可能用于在地图或图像上标记、分析或处理特定区域。
模块化应用管理：如果 aoi 表示“应用兴趣”，插件可能用于动态加载、管理或切换应用内的功能模块。
人工智能功能：如果与 AI 相关，插件可能提供机器学习、图像识别、自然语言处理等功能。

3. 可能的使用场景

以下是一些假设的使用场景：

地图或图像处理

// 假设 flutter_aoi 提供地图兴趣区域功能
import 'package:flutter_aoi/flutter_aoi.dart';

void main() {
  final aoiPlugin = FlutterAOI();

  // 设置兴趣区域
  aoiPlugin.setAreaOfInterest(latitude: 37.7749, longitude: -122.4194, radius: 1000);

  // 获取兴趣区域内的数据
  final data = aoiPlugin.getAreaData();
  print(data);
}

模块化应用管理

// 假设 flutter_aoi 用于动态加载模块
import 'package:flutter_aoi/flutter_aoi.dart';

void main() {
  final aoiPlugin = FlutterAOI();

  // 加载特定模块
  aoiPlugin.loadModule('user_profile');

  // 执行模块功能
  aoiPlugin.executeModuleFunction('updateProfile', {'name': 'John Doe'});
}

人工智能功能

// 假设 flutter_aoi 提供图像识别功能
import 'package:flutter_aoi/flutter_aoi.dart';

void main() async {
  final aoiPlugin = FlutterAOI();

  // 识别图像中的对象
  final result = await aoiPlugin.recognizeImage('path/to/image.jpg');
  print(result);
}