Update CameraFragment.kt (#420)

the fix was to update the onItemSelectedListener for spinnerModel. Instead of setting objectDetectorHelper.currentDelegate, we now directly set objectDetectorHelper.currentModel = p2. This ensures that when a new model is selected, the objectDetectorHelper actually uses the correct model for predictions, resolving the issue where results weren't updating.

examples/object_detection/android/app/src/main/java/com/google/mediapipe/examples/objectdetection/fragments/CameraFragment.kt

@@ -232,7 +232,7 @@ class CameraFragment : Fragment(), ObjectDetectorHelper.DetectorListener {
                     p3: Long
                 ) {
                     try {
-                        objectDetectorHelper.currentDelegate = p2
+                        objectDetectorHelper.currentModel = p2
                         updateControlsUi()
                     } catch(e: UninitializedPropertyAccessException) {
                         Log.e(TAG, "ObjectDetectorHelper has not been initialized yet.")