处理副屏加载失败导致的崩溃问题

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

@@ -46,7 +46,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
     private val viewModel by viewModels<UserViewModel>()
     private var imageCapture: ImageCapture? = null
     private var isAnalyzing = true // 控制是否进行图像分析
-    private lateinit var presentation: SecondaryScreenPresentation
+    private var presentation: SecondaryScreenPresentation? = null
     private val executor = Executors.newSingleThreadExecutor()
     private lateinit var adapter: GenericItemAdapter<FoodInfo, ItemFoodInfoBinding>
     private var checkedItem: FoodInfo? = null
@@ -74,7 +74,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
 
     private fun initData() {
         viewModel.getEquipmentToken()
-        presentation.step1()
+        presentation?.step1()
     }
 
     private fun initView() {
@@ -106,7 +106,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
                 position: Int,
                 id: Long
             ) {
-                presentation.updateMealPickupMode(position)
+                presentation?.updateMealPickupMode(position)
             }
 
             override fun onNothingSelected(parent: AdapterView<*>?) {}
@@ -129,7 +129,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
 
     fun updateCurrentFood(foodInfo: FoodInfo?) {
         if (foodInfo != null) {
-            presentation.updateFood(foodInfo)
+            presentation?.updateFood(foodInfo)
             binding.tvFoodName.text = foodInfo.foodName
             binding.previewView.visibility = View.GONE
             binding.ivImg.visibility = View.VISIBLE
@@ -137,7 +137,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
             if (TextUtils.isEmpty(imgUrl)) {
                 takePhoto { imgUri ->
                     GlideUtils.loadRoundCornerImage(this, imgUri, binding.ivImg, 12)
-                    presentation.updateFood(foodInfo.copy(imgUrl = imgUri.toString()))
+                    presentation?.updateFood(foodInfo.copy(imgUrl = imgUri.toString()))
                 }
             } else {
                 GlideUtils.loadRoundCornerImage(this, foodInfo.imgUrl, binding.ivImg, 12)
@@ -163,7 +163,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
         }
         SensorScaleUtils.startScale { weight ->
             Timber.d("registerDataChange weight = $weight")
-            presentation.updateWeight(weight)
+            presentation?.updateWeight(weight)
             if (weight > 0.0) {
                 if (canIdentify) {
                     canIdentify = false
@@ -222,7 +222,7 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
                         // 仅在步骤1时传递
                         if (isAnalyzing) {
                             val bitmap = imageProxy.toBitmap()
-                            presentation.updateImage(bitmap) // 更新副屏
+                            presentation?.updateImage(bitmap) // 更新副屏
                         }
                         imageProxy.close() // 必须关闭以释放资源
                     }
@@ -262,9 +262,9 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
         if (isAnalyzing) return
         isAnalyzing = true
         imageAnalysis?.setAnalyzer(executor) { imageProxy ->
-            if (presentation.currentStep == 1) {
+            if (presentation?.currentStep == 1) {
                 val bitmap = imageProxy.toBitmap()
-                presentation.updateImage(bitmap)
+                presentation?.updateImage(bitmap)
             }
             imageProxy.close()
         }
@@ -356,19 +356,21 @@ class MainActivity : BaseActivity<ActivityMainBinding>() {
                     viewModel = viewModel,
                     recognizeViewModel = viewModels<RecognizeViewModel>().value
                 )
-            presentation.setStepChangeCallback { step ->
+            presentation!!.setStepChangeCallback { step ->
                 if (step == 1) {
                     updateCurrentFood(null)
                     bottomSheetDialog?.dismiss()
                 }
             }
-            presentation.show()
+            presentation!!.show()
+        } else {
+            ToastUtils.showToast("获取副屏失败")
         }
     }
 
     override fun onDestroy() {
         SensorScaleUtils.closeScale()
-        presentation.dismiss()
+        presentation?.dismiss()
         super.onDestroy()
     }
 }

app/src/main/res/layout/presentation_secondary_screen.xml

@@ -121,6 +121,7 @@
             android:layout_height="486dp"
             android:layout_gravity="bottom"
             android:background="@drawable/rounded_border_transparent"
+            android:orientation="vertical"
             android:gravity="center">
 
             <TextView