refactor(PrepareCookActivity): 优化菜品识别逻辑和代码结构

- 移除未使用的 Bitmap 和 PreviewView 导入
- 添加 abs 函数导入用于重量比较计算
- 新增 WEIGHT_CHANGE_VALUE 和 WEIGHT_RECOGNIZE_VALUE 常量定义
- 实现重量变化阈值检测，避免频繁识别拍照
- 添加 lastWeight 变量记录上次重量值
- 将菜品选择逻辑提取为独立回调函数 foodSelectCallback
- 重命名 onItemClick 为 onFoodItemClick 并添加注释
- 为多个方法添加 KDoc 注释说明功能
- 在拍照失败回调中显示错误提示
- 优化菜品识别条件判断逻辑

app/src/main/java/com/shuwei/dish/match/ui/PrepareCookActivity.kt

@@ -1,7 +1,6 @@
 package com.shuwei.dish.match.ui
 
 import android.annotation.SuppressLint
-import android.graphics.Bitmap
 import android.graphics.Typeface
 import android.net.Uri
 import android.os.Bundle
@@ -20,7 +19,6 @@ import com.shuwei.dish.match.entity.CookFoodEntity
 import com.shuwei.dish.match.entity.CookFoodGoodsEntity
 import com.shuwei.dish.match.entity.FoodRecord
 import android.view.ViewGroup
-import androidx.camera.view.PreviewView
 import androidx.lifecycle.lifecycleScope
 import com.shuwei.dish.match.databinding.LayoutCameraPreviewBinding
 import com.shuwei.dish.match.objbox.FoodModule
@@ -41,6 +39,7 @@ import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.io.Serializable
 import java.util.concurrent.atomic.AtomicBoolean
+import kotlin.math.abs
 
 @SuppressLint("NotifyDataSetChanged")
 class PrepareCookActivity : BaseActivity() {
@@ -48,6 +47,8 @@ class PrepareCookActivity : BaseActivity() {
     companion object {
         const val TAG = "CookActivity"
         const val FOOD_ITEM = "foodItem"
+        const val WEIGHT_CHANGE_VALUE = 5
+        const val WEIGHT_RECOGNIZE_VALUE = 10
     }
 
     private lateinit var binding: ActivityPrepareCookBinding
@@ -126,6 +127,9 @@ class PrepareCookActivity : BaseActivity() {
         }
     }
 
+    /**
+     * 添加重量信息到食材数据
+     */
     private fun addWeight() {
         if (clickIndex == -1) {
             toast("请选择菜品构成")
@@ -153,30 +157,34 @@ class PrepareCookActivity : BaseActivity() {
     }
 
     private val isTakingPhoto = AtomicBoolean(false)
+    private var lastWeight = 0.0
 
     /**
      * 重量稳定时触发菜品识别
      * @param weight 当前稳定重量
      */
     private fun recognizeFood(weight: Double) {
-        if (weight < 10) {
+        if (weight < WEIGHT_RECOGNIZE_VALUE) {
             if (recognizeDialog.isShowing) recognizeDialog.dismiss()
             return
         }
-        if (isTakingPhoto.get() || recognizeDialog.isShowing) return
+        if (isTakingPhoto.get() || recognizeDialog.isShowing || abs(lastWeight - weight) <= WEIGHT_CHANGE_VALUE) return
         isTakingPhoto.set(true)
         cameraUtils.takePhoto(
             succCallback = cameraSuccessCallback,
             failCallback = cameraFailureCallback
         )
+        lastWeight = weight
     }
 
-    private fun addFood() {
+    /**
-        FoodSearchDialog().show(this) { item ->
+     * 菜品选择回调
+     */
+    private val foodSelectCallback: (CookFoodGoodsEntity) -> Unit = foodSelectCallback@{ item ->
         val filterResult = list.firstOrNull { it.goodsId == item.goodsId }
         if (filterResult != null) {
             toast("不允许重复添加同一食材")
-                return@show
+            return@foodSelectCallback
         }
         list.add(CookFoodGoodsEntity().apply {
             goodsId = item.goodsId
@@ -185,9 +193,15 @@ class PrepareCookActivity : BaseActivity() {
             isNewDishType = true
             isOriginalData = false
         })
-            onItemClick(list.size - 1)
+        onFoodItemClick(list.size - 1)
         binding.rvDishPartList.smoothScrollToPosition(list.size - 1)
     }
+
+    /**
+     * 添加食材
+     */
+    private fun addFood() {
+        FoodSearchDialog().show(activity = this, callback = foodSelectCallback)
     }
 
     private fun openSubmitPage() {
@@ -301,12 +315,15 @@ class PrepareCookActivity : BaseActivity() {
     private val dishPartAdapter by lazy {
         DishPartAdapter(list).apply {
             setOnItemClickListener { _, _, positon ->
-                onItemClick(positon)
+                onFoodItemClick(positon)
             }
         }
     }
 
-    private fun onItemClick(positon: Int) {
+    /**
+     * 菜品列表item点击
+     */
+    private fun onFoodItemClick(positon: Int) {
         this@PrepareCookActivity.clickIndex = positon
         list[clickIndex].let { it ->
             binding.tvDishShowName.run {
@@ -349,6 +366,9 @@ class PrepareCookActivity : BaseActivity() {
 
     private var clickIndex = -1
 
+    /**
+     * RecyclerView初始化
+     */
     private fun initRecyclerView() {
         binding.rvDishPartList.run {
             layoutManager =
@@ -417,6 +437,9 @@ class PrepareCookActivity : BaseActivity() {
         super.onBackPressed()
     }
 
+    /**
+     * 未保存数据提醒
+     */
     private fun saveDataRemindDialog() {
         val remindBinding = LayoutFoodRemindBinding.inflate(layoutInflater)
         remindBinding.tvDialogTitle.text = "温馨提示"
@@ -434,6 +457,9 @@ class PrepareCookActivity : BaseActivity() {
         }.show()
     }
 
+    /**
+     * 拍照成功回调
+     */
     private val cameraSuccessCallback: (Uri) -> Unit = { uri ->
         Log.d(TAG, "takePhoto success")
         lifecycleScope.launch {
@@ -457,11 +483,19 @@ class PrepareCookActivity : BaseActivity() {
         }
     }
 
+    /**
+     * 拍照失败回调
+     */
     private val cameraFailureCallback: (String) -> Unit = { errMsg ->
         Log.d(TAG, "takePhoto failure")
         isTakingPhoto.set(false)
+        toast(errMsg)
     }
 
+    /**
+     * 调用接口查询识别到的菜品
+     * @param list 食材列表
+     */
     private fun queryFood(list: List<FoodModule.IdNameScore>) {
         Log.d(TAG, "takePhoto queryFood, list=${list.toString()}")
         //调用接口成功，返回食材列表设置isTakingPhoto.set(false)，暂时写死数据