Flutter体重秤数据交互插件dopos_weight_scale的使用

Flutter体重秤数据交互插件dopos_weight_scale的使用

本项目是一个新的Flutter插件项目。它包含用于Android和/或iOS的平台特定实现代码。

开始使用

这个项目是开始使用Flutter开发的一个起点。如果你想要了解如何开始Flutter开发，可以查看在线文档，里面有教程、示例、移动开发指南以及完整的API引用。

示例代码

以下是一个简单的示例代码，展示了如何使用dopos_weight_scale插件来列出可用的体重秤设备，并获取选定设备上的重量数据。

import 'dart:developer';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:dopos_weight_scale/dopos_weight_scale.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('DoPOS Weight Scale')),
        body: DeviceListScreen(),
      ),
    );
  }
}

class DeviceListScreen extends StatefulWidget {
  [@override](/user/override)
  _DeviceListScreenState createState() => _DeviceListScreenState();
}

class _DeviceListScreenState extends State<DeviceListScreen> {
  List<String> devices = [];
  DoposWeightScale _doposWeightScale = DoposWeightScale();
  TextEditingController wv = new TextEditingController();

  Future<void> fetchDevices() async {
    devices = await _doposWeightScale.listDevices();
    setState(() {});
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Column(
      children: [
        ElevatedButton(
          onPressed: fetchDevices,
          child: const Text('List Devices'),
        ),
        Expanded(
          child: ListView.builder(
            itemCount: devices.length,
            itemBuilder: (_, index) {
              return ListTile(
                title: Text(devices[index]),
                onTap: () {
                  // 调用方法或处理点击事件
                  _onDeviceTapped(index);
                },
              );
            },
          ),
        ),
        Padding(
          padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
          child: TextField(
            controller: wv,
            textAlign: TextAlign.center,
            style: const TextStyle(
                fontSize: 20, fontWeight: FontWeight.bold, color: Colors.red),
            decoration: const InputDecoration(
              border: OutlineInputBorder(),
            ),
          ),
        ),
      ],
    );
  }

  // 方法以处理设备点击事件
  void _onDeviceTapped(int index) async {
    String selectedDevice = devices[index];
    String myWeight = await _doposWeightScale.getWeight(selectedDevice);
    // String myWeight = await _doposWeightScale.readWeight(index);
    log(myWeight);
    wv.text = myWeight;
    setState(() {});
  }
}

说明

1. 导入必要的包:

   import 'dart:developer';
   import 'package:flutter/material.dart';
   import 'dart:async';
   import 'package:dopos_weight_scale/dopos_weight_scale.dart';
   

2. 创建主应用类:

   void main() => runApp(MyApp());
   class MyApp extends StatelessWidget {
     [@override](/user/override)
     Widget build(BuildContext context) {
       return MaterialApp(
         home: Scaffold(
           appBar: AppBar(title: Text('DoPOS Weight Scale')),
           body: DeviceListScreen(),
         ),
       );
     }
   }
   

3. 定义设备列表屏幕:

   class DeviceListScreen extends StatefulWidget {
     [@override](/user/override)
     _DeviceListScreenState createState() => _DeviceListScreenState();
   }
   

4. 定义状态类并初始化变量:

   class _DeviceListScreenState extends State<DeviceListScreen> {
     List<String> devices = [];
     DoposWeightScale _doposWeightScale = DoposWeightScale();
     TextEditingController wv = new TextEditingController();
   

5. 获取设备列表:

   Future<void> fetchDevices() async {
     devices = await _doposWeightScale.listDevices();
     setState(() {});
   }
   

6. 构建UI界面:

   [@override](/user/override)
   Widget build(BuildContext context) {
     return Column(
       children: [
         ElevatedButton(
           onPressed: fetchDevices,
           child: const Text('List Devices'),
         ),
         Expanded(
           child: ListView.builder(
             itemCount: devices.length,
             itemBuilder: (_, index) {
               return ListTile(
                 title: Text(devices[index]),
                 onTap: () {
                   _onDeviceTapped(index);
                 },
               );
             },
           ),
         ),
         Padding(
           padding: const EdgeInsets.symmetric(horizontal: 16.0, vertical: 8.0),
           child: TextField(
             controller: wv,
             textAlign: TextAlign.center,
             style: const TextStyle(fontSize: 20, fontWeight: FontWeight.bold, color: Colors.red),
             decoration: const InputDecoration(border: OutlineInputBorder()),
           ),
         ),
       ],
     );
   }
   

7. 处理设备点击事件并获取重量:

   void _onDeviceTapped(int index) async {
     String selectedDevice = devices[index];
     String myWeight = await _doposWeightScale.getWeight(selectedDevice);
     log(myWeight);
     wv.text = myWeight;
     setState(() {});
   }