fix(recognition): 防止识别时重复触发导致多次并发处理

- 新增 isRecognizing 标记防止识别过程重复进入
- 在识别开始时设置标记，结束时释放标记
- 多处识别终止和异常处理处均释放识别锁
- 在重量回调中增加去重逻辑，避免同一重量重复触发回调
- 更新 lastCallbackWeight，确保仅在重量变化时触发回调

app/src/main/java/com/sw/dualscreen/activity/MainActivity.kt

@@ -178,6 +178,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
     private var lastPhotoUri: Uri? = null // 最后拍照的图片
     private var debouncer = Debouncer(2000)
     private var isRecognitionFood = true
+    private var isRecognizing = false
     private var isFirstOpen = true
 
     private var isStartRecognize = false
@@ -520,6 +521,15 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
     private var startTime = 0L
 
     fun recognizeFood() {
+        // 防重入：识别进行中则跳过，避免重量变化触发多次并发识别
+        if (isRecognizing) {
+            log("recognizeFood 已在识别中，跳过重复调用")
+            return
+        }
+        isRecognizing = true
+        // 立即更新基准重量，缩小后续重量变化触发识别的窗口
+        lastWeight = currentWeight
+
         startTime = System.currentTimeMillis()
 //        LightManager.openRedLight()
         LightManager.closeRedLight()
@@ -545,6 +555,8 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
             shutdownCamera()
             setupCamera()
 
+            // 释放识别锁，允许递归重试时重新获取
+            isRecognizing = false
             binding.root.postDelayed({
                 recognizeFood()
             }, 1000)
@@ -568,6 +580,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
         log("registerDataChange识别后查询接口数据：$queryData,识别数据：$recData")
         if (list.isEmpty()) {
             foodRecognizeState = false
+            isRecognizing = false
             tvToSearch.let {
                 it.text = "未查询到，手动搜索"
                 it.visible()
@@ -575,6 +588,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
             return
         }
         foodRecognizeState = true
+        isRecognizing = false
         //查询到菜品信息，同步设置lastWeight=currentWeight
         lastWeight = currentWeight
         presentation?.updateWeight(currentWeight)
@@ -790,6 +804,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
         checkedItem = null
         lastWeight = 0
         foodRecognizeState = true
+        isRecognizing = false
         isSwitchFood = false
     }
 
@@ -1358,6 +1373,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
             //binding.layoutRescan.visibility = View.VISIBLE
 
             withContext(Dispatchers.Main) {
+                isRecognizing = false
                 tvToSearch.let {
                     it.text = "未识别到，手动搜索"
                     it.visible()

app/src/main/java/com/sw/dualscreen/sdk/SensorScaleUtils.kt

@@ -24,6 +24,7 @@ object SensorScaleUtils {
       var isZero = false
     private var callback: Callback? = {}
     private var lastWeight: Double? = null
+    private var lastCallbackWeight: Double? = null
 
     private fun init() {
         mSensorScale = SensorScale(object : OnScaleResult {
@@ -45,9 +46,13 @@ object SensorScaleUtils {
                         callback?.invoke(value)
                     }
 
-                    weightCallbackList.forEach {
-                        val currentWeight = value * 1000
-                        it.invoke(currentWeight.roundToInt())
+                    // 去重：仅在重量变化时回调 weightCallbackList，避免同一重量反复触发
+                    if (lastCallbackWeight != value) {
+                        lastCallbackWeight = value
+                        weightCallbackList.forEach {
+                            val currentWeight = value * 1000
+                            it.invoke(currentWeight.roundToInt())
+                        }
                     }
                 }
             }