解决录制结束后，无法重新预览相机问题

android/app/src/main/kotlin/com/qxy/dronex/recording/RecordingPlatformHandler.kt

@@ -161,22 +161,31 @@ class RecordingPlatformHandler(
         controller.stopRecording { path ->
             RecordingSession.stopForeground(activity)
             DoNotDisturbHelper.disable(activity)
-            mainHandler.post {
-                val gallerySaved = path != null && controller.status.state != RecordingState.ERROR
-                val payload =
-                        mutableMapOf<String, Any?>(
-                                "outputPath" to path,
-                                "status" to controller.status.toMap(),
-                                "gallerySaved" to gallerySaved,
-                        )
-                if (!gallerySaved) {
-                    payload["galleryErrorMessage"] = controller.status.message ?: "保存到相册失败"
-                }
-                result.success(payload)
+            val previewView = activity.recordingPreviewView
+            if (previewView == null) {
+                mainHandler.post { deliverStopResult(result, path) }
+                return@stopRecording
+            }
+            controller.rebindForRecording(activity, previewView) { _ ->
+                mainHandler.post { deliverStopResult(result, path) }
             }
         }
     }
 
+    private fun deliverStopResult(result: MethodChannel.Result, path: String?) {
+        val gallerySaved = path != null && controller.status.state != RecordingState.ERROR
+        val payload =
+                mutableMapOf<String, Any?>(
+                        "outputPath" to path,
+                        "status" to controller.status.toMap(),
+                        "gallerySaved" to gallerySaved,
+                )
+        if (!gallerySaved) {
+            payload["galleryErrorMessage"] = controller.status.message ?: "保存到相册失败"
+        }
+        result.success(payload)
+    }
+
     private fun setImmersiveMode(enabled: Boolean) {
         val window = activity.window
         WindowCompat.setDecorFitsSystemWindows(window, !enabled)

lib/features/recording/view-model/view_model_recording.dart

@@ -196,6 +196,32 @@ class RecordingViewModel extends Notifier<RecordingModel> {
     throw StateError('initializePreview retry exhausted');
   }
 
+  /// 停止录制后重新绑定相机预览（重置 isPreviewReady 以显示加载遮罩）。
+  Future<void> restorePreview() async {
+    if (!RecordingPlatform.isSupported) return;
+
+    _updateSession((s) => s.copyWith(isPreviewReady: false, errorMessage: null));
+    try {
+      final status = await _initializePreviewWithRetry();
+      _updateSession(
+        (s) => s.copyWith(
+          status: status,
+          isPreviewReady: status.state == RecordingState.previewing,
+          errorMessage: status.state == RecordingState.previewing
+              ? null
+              : (status.message ?? '相机预览初始化失败'),
+        ),
+      );
+    } on PlatformException catch (error) {
+      _updateSession(
+        (s) => s.copyWith(
+          isPreviewReady: false,
+          errorMessage: error.message ?? '相机预览初始化失败',
+        ),
+      );
+    }
+  }
+
   List<Permission> _galleryPermissions() {
     if (Platform.isIOS) {
       return [Permission.photosAddOnly, Permission.photos];
@@ -280,6 +306,8 @@ class RecordingViewModel extends Notifier<RecordingModel> {
       _updateSession(
         (s) => s.copyWith(errorMessage: error.message ?? '停止录制失败'),
       );
+    } finally {
+      await restorePreview();
     }
   }