diff --git a/app/src/main/java/com/casic/common/detector/gd/view/MainActivity.kt b/app/src/main/java/com/casic/common/detector/gd/view/MainActivity.kt
index db1574b..881eb33 100644
--- a/app/src/main/java/com/casic/common/detector/gd/view/MainActivity.kt
+++ b/app/src/main/java/com/casic/common/detector/gd/view/MainActivity.kt
@@ -122,9 +122,15 @@
 
     private val serviceConnection = object : ServiceConnection {
         override fun onServiceConnected(name: ComponentName?, iBinder: IBinder?) {
-            if (iBinder is SerialPortService.ServiceBinder) {
-                serialPortService = iBinder.getSerialPortService()
-                Log.d(kTag, "onServiceConnected: 服务已绑定")
+            if (name != null && iBinder != null && iBinder is SerialPortService.ServiceBinder) {
+                try {
+                    serialPortService = iBinder.getSerialPortService()
+                    Log.d(kTag, "onServiceConnected: 服务已绑定")
+                } catch (e: Exception) {
+                    Log.e(kTag, "onServiceConnected: 绑定服务时发生异常", e)
+                }
+            } else {
+                Log.w(kTag, "onServiceConnected: name 或 iBinder 为 null")
             }
         }
 
@@ -909,9 +915,8 @@
         clusterOverlay?.onDestroy()
         binding.mapView.onDestroy()
         soundPool.autoPause()
-        serialPortService?.closeSerialPort()
-        unbindService(serviceConnection)
         locationKit.stopLocation()
+        unbindService(serviceConnection)
         BaseApplication.get().closeSerialPort()
     }
 }
\ No newline at end of file