fix(fragment): 修复 CollectFragment 首次打开相机预览不显示的问题

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

@@ -92,9 +92,9 @@ class SingleFragmentActivity : BaseActivity() {
      * 根据页面类型返回对应标题文本
      */
     private fun getTitleForPage(pageType: PageType): String = when (pageType) {
-        PageType.FOOD_COLLECT -> "菜品采集"
+        PageType.FOOD_COLLECT -> "食材采样"
-        PageType.COOK_MODE -> "设备配置"
+        PageType.COOK_MODE -> "餐品模式"
-        PageType.SEASONING_CONFIG -> "调料配置"
+        PageType.SEASONING_CONFIG -> "调料区设置"
     }
 
     /**

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

@@ -11,6 +11,7 @@ import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo
 import android.view.inputmethod.InputMethodManager
 import androidx.camera.view.PreviewView
+import androidx.core.view.doOnLayout
 import androidx.core.view.updateLayoutParams
 import androidx.recyclerview.widget.GridLayoutManager
 import com.shuwei.dish.match.R
@@ -36,7 +37,7 @@ class CollectFragment : BaseFragment<FragmentCollectBinding>(){
 
     companion object {
         private const val TAG = "CollectFragment"
-        const val MAX_COUNT = 9
+        const val MAX_COUNT = 18
     }
 
     private var selectedFoodId: String? = ""
@@ -194,7 +195,11 @@ class CollectFragment : BaseFragment<FragmentCollectBinding>(){
         initCamera(binding.flCameraPreview)
         currentActivity.setLifecycleCallback(object : SingleFragmentActivity.LifecycleCallback {
             override fun onActivityResume() {
-                cameraUtils.bind()
+                // 首次进入时 previewView 尚未 attach，由 doOnLayout 负责首次 bind
+                // 从后台切回时 previewView 已 attach，直接 bind 恢复预览
+                if (::previewView.isInitialized && previewView.isAttachedToWindow) {
+                    cameraUtils.bind()
+                }
             }
 
             override fun onActivityPause() {
@@ -355,7 +360,7 @@ class CollectFragment : BaseFragment<FragmentCollectBinding>(){
 
     override fun onResume() {
         super.onResume()
-        if (isVisible.not()) return
+        // 不使用 isVisible 判断，首次打开时 View 尚未 attach 到 Window，isVisible 会返回 false 导致遮罩永不隐藏
         binding.llCameraFlag.run {
             visibility = View.VISIBLE
             postDelayed({
@@ -408,6 +413,10 @@ class CollectFragment : BaseFragment<FragmentCollectBinding>(){
             }
         }
         cameraUtils.setPreviewController(previewView)
+        // doOnLayout 确保 previewView 测量完成（有有效尺寸和 Surface）后再 bind，解决首次打开无预览问题
+        previewView.doOnLayout {
+            cameraUtils.bind()
+        }
     }
 
 }

app/src/main/java/com/shuwei/dish/match/utils/CameraUtils.kt

@@ -64,7 +64,7 @@ class CameraUtils(private var activity: ComponentActivity) {
                 )
                 cameraSelector = CameraSelector.DEFAULT_BACK_CAMERA
             }
-            bind()
+            // bind() 由外部在 previewView attach 到窗口后调用，避免首次无预览
         }
 
 //        if (isCameraReady.not()) {