Flutter红外传感器功能插件ir_sensor_plugin的使用

ir_sensor_plugin

此插件允许Flutter应用程序使用红外传感器。

使用方法 Usage

注意事项

• 仅支持Android。如果在iOS上调用该插件，将会导致应用崩溃。
• 需要在AndroidManifest.xml中添加权限：

<uses-permission android:name="android.permission.TRANSMIT_IR" />

方法使用 How to use the methods

1. 检查设备是否具有红外发射器

   final bool hasIrEmitter = await IrSensorPlugin.hasIrEmitter;
   

2. 查询红外发射器支持的载波频率（单位：赫兹）

   final String getCarrierFrequencies = await IrSensorPlugin.getCarrierFrequencies;
   

3. 更改传输频率，默认为38020 Hz

   final String result = await IrSensorPlugin.setFrequencies(40000);
   

4. 传输红外模式

   • 使用HEX字符串形式的模式：

     static const TV_POWER_HEX = "0000 006d 0022 0003 00a9 00a8 0015 003f ..."; // 示例HEX字符串
     
     final String result = await IrSensorPlugin.transmitString(pattern: TV_POWER_HEX);
     

   • 使用整数列表形式的模式：

     var power = [169, 168, 21, 63, 21, 63, 21, 63, 21, 63, 21, 63, 21, 63, 21, 63, 21, 1794, 169, 168, 21, 21, 21, 3694];
     
     final String result = await IrSensorPlugin.transmitListInt(list: power);
     

示例代码 Example Code

以下是一个完整的示例应用程序，展示了如何使用ir_sensor_plugin插件。

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:ir_sensor_plugin/ir_sensor_plugin.dart';

const laskoOnOff =
    '0000 006D 0000 000C 002E 000E 002E 000E 000E 002E 002E 000E 002E 000E 000E 002E 000E 002E 000E 002E 000E 002E 000E 002E 000E 002E 002E 010D';

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

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  MyAppState createState() => MyAppState();
}

class MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';
  bool _hasIrEmitter = false;
  String _getCarrierFrequencies = 'Unknown';

  var power = [
    169,
    168,
    21,
    63,
    21,
    63,
    21,
    63,
    21,
    63,
    21,
    63,
    21,
    63,
    21,
    63,
    21,
    1794,
    169,
    168,
    21,
    21,
    21,
    3694
  ];

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

  Future<void> initPlatformState() async {
    String platformVersion;
    bool hasIrEmitter;
    String getCarrierFrequencies;

    try {
      platformVersion = await IrSensorPlugin.platformVersion;
      hasIrEmitter = await IrSensorPlugin.hasIrEmitter;
      getCarrierFrequencies = await IrSensorPlugin.getCarrierFrequencies;
    } on PlatformException {
      platformVersion = 'Failed to get data in a platform.';
      hasIrEmitter = false;
      getCarrierFrequencies = 'None';
    }

    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
      _hasIrEmitter = hasIrEmitter;
      _getCarrierFrequencies = getCarrierFrequencies;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            children: [
              Container(height: 15.0),
              Text('Running on: $_platformVersion\n'),
              Text('Has Ir Emitter: $_hasIrEmitter\n'),
              Text('IR Carrier Frequencies:$_getCarrierFrequencies'),
              Container(height: 15.0),
              MaterialButton(
                color: Colors.amber,
                onPressed: () async {
                  if (_hasIrEmitter) {
                    final String result = await IrSensorPlugin.transmitListInt(list: power);
                    debugPrint('Emitting List Int Signal: $result');
                  } else {
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Not has Ir emitter')));
                  }
                },
                child: Text('Transmitt List Int'),
              ),
              Container(height: 15.0),
              FormSpecificCode(hasIrEmitter: _hasIrEmitter),
            ],
          ),
        ),
      ),
    );
  }
}

class FormSpecificCode extends StatelessWidget {
  FormSpecificCode({
    super.key,
    required this.hasIrEmitter,
  });

  final bool hasIrEmitter;
  final _formKey = GlobalKey<FormState>();
  final _textController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Column(children: [
      Form(
        key: _formKey,
        child: Column(children: <Widget>[
          Padding(
            padding: const EdgeInsets.all(8.0),
            child: TextFormField(
              decoration: InputDecoration(
                hintText: 'Write specific String code to transmit',
                suffixIcon: IconButton(
                  onPressed: () => _textController.clear(),
                  icon: Icon(Icons.clear),
                ),
              ),
              controller: _textController,
              validator: (value) {
                if (value?.isEmpty ?? true) {
                  return 'Write the code to transmit';
                }
                return null;
              },
            ),
          )
        ]),
      ),
      Container(height: 15.0),
      MaterialButton(
        color: Colors.amber,
        onPressed: () async {
          if (hasIrEmitter && (_formKey.currentState?.validate() ?? false)) {
            final String result = await IrSensorPlugin.transmitString(pattern: _textController.text);
            if (result.contains('Emitting') && context.mounted) {
              ScaffoldMessenger.of(context)
                ..clearSnackBars()
                ..showSnackBar(
                  SnackBar(
                    content: Text('Broadcasting... ${_textController.text}'),
                  ),
                );
            }
          } else {
            ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text('Not has Ir emitter or invalid code')));
          }
        },
        child: Text('Transmit Specific Code HEX'),
      )
    ]);
  }
}

通过以上内容，您可以了解如何在Flutter项目中使用ir_sensor_plugin插件来实现红外传感器的功能。希望这些信息对您有所帮助！