diff --git a/app/src/main/java/com/nova/brain/glass/helper/GlassMediaServiceHelper.kt b/app/src/main/java/com/nova/brain/glass/helper/GlassMediaServiceHelper.kt
index 8a62b2e..4ee6c84 100644
--- a/app/src/main/java/com/nova/brain/glass/helper/GlassMediaServiceHelper.kt
+++ b/app/src/main/java/com/nova/brain/glass/helper/GlassMediaServiceHelper.kt
@@ -2,14 +2,15 @@ package com.nova.brain.glass.helper
 
 import android.view.Surface
 import com.rokid.security.glass3.open.sdk.GlassSdk
+import com.rokid.security.system.server.media.IMediaServer
 import com.rokid.security.system.server.media.callback.ICameraSurfaceCallback
 import com.rokid.security.system.server.media.callback.PhotoFileCallback
 
 object GlassMediaServiceHelper {
     @Volatile
-    private var mediaService: Any? = null
+    private var mediaService: IMediaServer? = null
 
-    private fun service(): Any? {
+    private fun service(): IMediaServer? {
         val cached = mediaService
         if (cached != null) {
             return cached
@@ -20,51 +21,34 @@ object GlassMediaServiceHelper {
     }
 
     fun takePhoto(resolution: Int, path: String) {
-        val service = service() ?: return
-        service.javaClass.getMethod("takePhoto", Int::class.javaPrimitiveType, String::class.java)
-            .invoke(service, resolution, path)
+        service()?.takePhoto(resolution, path)
     }
 
     fun addPhotoCallback(callback: PhotoFileCallback) {
-        val service = service() ?: return
-        service.javaClass.getMethod("addPhotoCallback", PhotoFileCallback::class.java)
-            .invoke(service, callback)
+        service()?.addPhotoCallback(callback)
     }
 
     fun removePhotoCallback(callback: PhotoFileCallback) {
-        val service = service() ?: return
-        service.javaClass.getMethod("removePhotoCallback", PhotoFileCallback::class.java)
-            .invoke(service, callback)
+        service()?.removePhotoCallback(callback)
     }
 
     fun startCameraShare(surface: Surface, callback: ICameraSurfaceCallback) {
-        val service = service() ?: return
-        service.javaClass.getMethod(
-            "startCameraShare",
-            Surface::class.java,
-            ICameraSurfaceCallback::class.java
-        ).invoke(service, surface, callback)
+        service()?.startCameraShare(surface, callback)
     }
 
     fun stopCameraShare(callback: ICameraSurfaceCallback) {
-        val service = service() ?: return
-        service.javaClass.getMethod("stopCameraShare", ICameraSurfaceCallback::class.java)
-            .invoke(service, callback)
+        service()?.stopCameraShare(callback)
     }
 
     fun getMaxZoomLevel(): Int {
-        val service = service() ?: return 0
-        return (service.javaClass.getMethod("getMaxZoomLevel").invoke(service) as? Int) ?: 0
+        return service()?.maxZoomLevel ?: 0
     }
 
     fun getZoomLevel(): Int {
-        val service = service() ?: return 0
-        return (service.javaClass.getMethod("getZoomLevel").invoke(service) as? Int) ?: 0
+        return service()?.zoomLevel ?: 0
     }
 
     fun zoomCamera(level: Int) {
-        val service = service() ?: return
-        service.javaClass.getMethod("zoomCamera", Int::class.javaPrimitiveType)
-            .invoke(service, level)
+        service()?.zoomCamera(level)
     }
 }