Update 优化称重页面，适配蓝牙称上传重量

UI/CF.APP/chicken_farm/lib/pages/breeding/individual_weighing_page.dart

@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:chicken_farm/components/vb_app_bar.dart';
 import 'package:chicken_farm/core/utils/toast.dart';
 import 'package:chicken_farm/components/vb_rfid_field.dart';
+import 'package:chicken_farm/core/utils/logger.dart';
+import 'dart:async';
 
 class IndividualWeighingPage extends StatefulWidget {
   const IndividualWeighingPage({super.key});
@@ -15,6 +17,26 @@ class _IndividualWeighingPageState extends State<IndividualWeighingPage> {
   double? _weight;
   bool _isReadingWeight = false;
 
+  // 添加TextController和FocusNode用于重量输入框
+  final TextEditingController _weightController = TextEditingController();
+  final FocusNode _weightFocusNode = FocusNode();
+
+  // 添加Timer用于延迟处理输入
+  Timer? _inputDebounceTimer;
+  // 添加超时Timer
+  Timer? _timeoutTimer;
+
+  @override
+  void dispose() {
+    // 释放TextEditingController和FocusNode
+    _weightController.dispose();
+    _weightFocusNode.dispose();
+    // 取消定时器
+    _inputDebounceTimer?.cancel();
+    _timeoutTimer?.cancel();
+    super.dispose();
+  }
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -62,6 +84,7 @@ class _IndividualWeighingPageState extends State<IndividualWeighingPage> {
           _rfid = rfid;
         });
         ToastUtil.success('电子编号识别成功');
+        _handleReadWeight();
       },
       label: '电子编号',
       placeholder: '未识别',
@@ -83,24 +106,79 @@ class _IndividualWeighingPageState extends State<IndividualWeighingPage> {
           child: Row(
             children: [
               Expanded(
-                child: Text(
-                  _weight != null ? _weight!.toStringAsFixed(2) : '未读取',
+                child: TextField(
+                  focusNode: _weightFocusNode,
+                  controller: _weightController,
+                  enabled: _weight == null,
+                  decoration: InputDecoration(
+                    border: InputBorder.none,
+                    hintText: _weight != null
+                        ? null
+                        : _isReadingWeight
+                        ? "正在读取重量"
+                        : '请读取重量',
+                    hintStyle: TextStyle(
+                      color: _isReadingWeight
+                          ? Colors.red
+                          : _weight != null
+                          ? Colors.black
+                          : Colors.grey,
+                      fontSize: 16,
+                    ),
+                  ),
                   style: TextStyle(
                     color: _weight != null ? Colors.black : Colors.grey,
                     fontSize: 16,
                   ),
+                  keyboardType: TextInputType.numberWithOptions(decimal: true),
+                  onChanged: (text) {
+                    // 取消之前的定时器
+                    _inputDebounceTimer?.cancel();
+                    // 设置新的定时器，延时处理输入
+                    _inputDebounceTimer = Timer(
+                      const Duration(milliseconds: 500),
+                      () {
+                        if (text.isEmpty) {
+                          setState(() {
+                            _weight = null;
+                          });
+                        } else {
+                          try {
+                            final parsedValue = double.tryParse(text);
+                            if (parsedValue != null) {
+                              setState(() {
+                                _weight = parsedValue;
+                              });
+                              ToastUtil.success('重量读取成功');
+                            }
+                            _isReadingWeight = false;
+                          } catch (e) {
+                            // 输入无效时不更新_weight
+                            logger.e('解析重量值失败: $e');
+                          }
+                        }
+                      },
+                    );
+                  },
                 ),
               ),
-              IconButton(
-                icon: _isReadingWeight
-                    ? const SizedBox(
-                        width: 20,
-                        height: 20,
-                        child: CircularProgressIndicator(strokeWidth: 2),
-                      )
-                    : const Icon(Icons.sync, size: 20),
-                onPressed: _simulateReadWeight,
-              ),
+              if (_weight != null) ...[
+                IconButton(
+                  icon: const Icon(Icons.refresh, size: 20),
+                  onPressed: _handleReadWeight,
+                ),
+              ] else ...[
+                IconButton(
+                  icon: _isReadingWeight
+                      ? const SizedBox(
+                          width: 20,
+                          height: 20,
+                          child: CircularProgressIndicator(strokeWidth: 2),
+                        )
+                      : const Icon(Icons.sync, size: 20),
+                  onPressed: _handleReadWeight,
+                ),
+              ],
             ],
           ),
         ),
@@ -108,24 +186,29 @@ class _IndividualWeighingPageState extends State<IndividualWeighingPage> {
     );
   }
 
-  // 模拟读取重量
-  void _simulateReadWeight() {
-    if (_isReadingWeight) return;
-
+  void _handleReadWeight() {
     setState(() {
+      _weight = null;
+      _weightController.clear();
       _isReadingWeight = true;
     });
-
-    // 模拟读取重量过程
-    Future.delayed(const Duration(seconds: 1), () {
+    // 重置后输入框获得焦点
+    WidgetsBinding.instance.addPostFrameCallback((_) {
       if (mounted) {
+        _weightFocusNode.requestFocus();
+      }
+    });
+
+    // 设置3秒超时
+    _timeoutTimer?.cancel(); // 取消之前的超时定时器
+    _timeoutTimer = Timer(const Duration(seconds: 15), () {
+      if (mounted && _isReadingWeight == true) {
         setState(() {
-          _weight = double.parse(
-            (5.0 + DateTime.now().millisecond % 50 / 10).toStringAsFixed(2),
-          );
+          _weight = null;
           _isReadingWeight = false;
+          _weightFocusNode.unfocus();
         });
-        ToastUtil.success('重量读取成功');
+        ToastUtil.error('读取重量超时');
       }
     });
   }
@@ -141,6 +224,7 @@ class _IndividualWeighingPageState extends State<IndividualWeighingPage> {
     setState(() {
       _rfid = null;
       _weight = null;
+      _weightController.clear();
     });
   }
 }