修复了多次步骤2到步骤3问题

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

@@ -4,6 +4,7 @@ import android.content.Context
 import android.graphics.Outline
 import android.graphics.Typeface
 import android.hardware.display.DisplayManager
+import android.net.Uri
 import android.os.Bundle
 import android.view.View
 import android.view.ViewOutlineProvider
@@ -54,7 +55,7 @@ class MainActivity : AppCompatActivity() {
     private var checkedItem: FoodInfo? = null
     private var imageAnalysis: ImageAnalysis? = null
     private var cameraProviderFuture: ListenableFuture<ProcessCameraProvider>? = null
-    private var canIdentify: Boolean = true
+    private var canIdentify: Boolean = false
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -132,8 +133,8 @@ class MainActivity : AppCompatActivity() {
     }
 
     fun updateCurrentFood(foodInfo: FoodInfo?) {
-        presentation.updateFood(foodInfo)
         if (foodInfo != null) {
+            presentation.updateFood(foodInfo)
             binding.tvFoodName.text = foodInfo.foodName
             binding.previewView.visibility = View.GONE
             binding.ivImg.visibility = View.VISIBLE
@@ -156,7 +157,6 @@ class MainActivity : AppCompatActivity() {
 //                presentation.step2()
             }
         }
-        viewModel.getIdentifiedFoodList()
         SensorScaleUtils.startScale { weight ->
 //            Timber.d("weight = $weight")
             if (weight > 0.0) {
@@ -289,7 +289,7 @@ class MainActivity : AppCompatActivity() {
     }
 
     // 拍照功能
-    private fun takePhoto() {
+    private fun takePhoto(callback: (Uri) -> Unit) {
         // 临时停止分析以避免干扰
         isAnalyzing = false
 
@@ -306,7 +306,11 @@ class MainActivity : AppCompatActivity() {
             object : ImageCapture.OnImageSavedCallback {
                 override fun onImageSaved(outputFileResults: ImageCapture.OutputFileResults) {
                     runOnUiThread {
-                        ToastUtils.showToast("照片保存成功: ${outputFileResults.savedUri}")
+                        val savedUri = outputFileResults.savedUri
+                        ToastUtils.showToast("照片保存成功: $savedUri")
+                        if (savedUri != null) {
+                            callback(savedUri)
+                        }
                     }
                     // 恢复图像分析
                     isAnalyzing = true