Merge pull request #131 from YAPP-Github/BOOK-245-fix/#124

fix: 시스템 권한 팝업에서 허용 시 카메라 프리뷰 안보이는 문제 수정

Author: seoyoon513

feature/record/src/main/kotlin/com/ninecraft/booket/feature/record/ocr/OcrUi.kt

@@ -34,7 +34,10 @@ import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
@@ -89,11 +92,19 @@ private fun CameraPreview(
     val lifecycleOwner = LocalLifecycleOwner.current
     val permission = android.Manifest.permission.CAMERA
 
-    // UI에서 항상 권한 최신 상태 확인
-    val isGranted = ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED
-    val launcher = rememberLauncherForActivityResult(
+    /**
+     * Camera Permission Request
+     */
+    var isGranted by remember {
+        mutableStateOf(
+            ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED,
+        )
+    }
+    val permissionLauncher = rememberLauncherForActivityResult(
         contract = ActivityResultContracts.RequestPermission(),
     ) { granted ->
+        isGranted = granted
+
         if (!granted) {
             state.eventSink(OcrUiEvent.OnShowPermissionDialog)
         }
@@ -102,45 +113,20 @@ private fun CameraPreview(
         contract = ActivityResultContracts.StartActivityForResult(),
     ) { _ -> }
 
-    val cameraController = remember { LifecycleCameraController(context) }
-    val imageAnalyzer = remember {
-        ImageAnalysis.Analyzer { imageProxy ->
-            state.eventSink(OcrUiEvent.OnFrameReceived(imageProxy))
-        }
-    }
-
-    val systemUiController = rememberSystemUiController()
-
-    DisposableEffect(systemUiController) {
-        systemUiController.setSystemBarsColor(
-            color = Color.Transparent,
-            darkIcons = false,
-            isNavigationBarContrastEnforced = false,
-        )
-
-        onDispose {
-            systemUiController.setSystemBarsColor(
-                color = Color.Transparent,
-                darkIcons = true,
-                isNavigationBarContrastEnforced = false,
-            )
-        }
-    }
-
     // 최초 진입 시 권한 요청
     LaunchedEffect(Unit) {
         if (!isGranted) {
             state.eventSink(OcrUiEvent.OnHidePermissionDialog)
-            launcher.launch(permission)
+            permissionLauncher.launch(permission)
         }
     }
 
-    // 앱이 포그라운드로 북귀할 때 OS 권한 체크
+    // 앱이 포그라운드로 북귀할 때 OS 권한 동기화
     DisposableEffect(Unit) {
         val observer = LifecycleEventObserver { _, event ->
             if (event == Lifecycle.Event.ON_RESUME) {
-                val currentGrant = ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED
-                if (currentGrant) {
+                isGranted = ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED
+                if (isGranted) {
                     state.eventSink(OcrUiEvent.OnHidePermissionDialog)
                 } else {
                     state.eventSink(OcrUiEvent.OnShowPermissionDialog)
@@ -151,18 +137,52 @@ private fun CameraPreview(
         onDispose { lifecycleOwner.lifecycle.removeObserver(observer) }
     }
 
-    DisposableEffect(lifecycleOwner, cameraController) {
-        cameraController.bindToLifecycle(lifecycleOwner)
-        cameraController.setImageAnalysisAnalyzer(
-            ContextCompat.getMainExecutor(context),
-            imageAnalyzer,
-        )
+    /**
+     * Camera Controller & ImageAnalyzer
+     */
+    val cameraController = remember { LifecycleCameraController(context) }
+    val imageAnalyzer = remember {
+        ImageAnalysis.Analyzer { imageProxy ->
+            state.eventSink(OcrUiEvent.OnFrameReceived(imageProxy))
+        }
+    }
+
+    DisposableEffect(isGranted, lifecycleOwner, cameraController) {
+        if (isGranted) {
+            cameraController.bindToLifecycle(lifecycleOwner)
+            cameraController.setImageAnalysisAnalyzer(
+                ContextCompat.getMainExecutor(context),
+                imageAnalyzer,
+            )
+        }
+
         onDispose {
             cameraController.unbind()
             cameraController.clearImageAnalysisAnalyzer()
         }
     }
 
+    /**
+     * SystemStatusBar Color
+     */
+    val systemUiController = rememberSystemUiController()
+
+    DisposableEffect(systemUiController) {
+        systemUiController.setSystemBarsColor(
+            color = Color.Transparent,
+            darkIcons = false,
+            isNavigationBarContrastEnforced = false,
+        )
+
+        onDispose {
+            systemUiController.setSystemBarsColor(
+                color = Color.Transparent,
+                darkIcons = true,
+                isNavigationBarContrastEnforced = false,
+            )
+        }
+    }
+
     ReedScaffold(
         modifier = modifier.fillMaxSize(),
         containerColor = Neutral950,