diff --git a/app/src/main/java/com/casic/common/detector/gd/view/InstallMarkerActivity.kt b/app/src/main/java/com/casic/common/detector/gd/view/InstallMarkerActivity.kt
index 3dc737e..03976a6 100644
--- a/app/src/main/java/com/casic/common/detector/gd/view/InstallMarkerActivity.kt
+++ b/app/src/main/java/com/casic/common/detector/gd/view/InstallMarkerActivity.kt
@@ -266,7 +266,6 @@
             runOnUiThread {
                 LoadingDialog.dismiss()
                 countDownTimer.cancel()
-                serialPortService?.closeSerialPort()
                 binding.readMarkerButton.isEnabled = true
                 binding.identifierInclude.identifierIdView.text = markerId
             }
@@ -285,7 +284,6 @@
             LoadingDialog.dismiss()
             "读取此标识器ID超时，请重试".show(context)
             binding.readMarkerButton.isEnabled = true
-            serialPortService?.closeSerialPort()
         }
     }
 
@@ -362,9 +360,15 @@
 
     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")
             }
         }
 
@@ -537,6 +541,7 @@
 
     override fun onDestroy() {
         super.onDestroy()
+        serialPortService?.closeSerialPort()
         locationKit.stopLocation()
         unbindService(serviceConnection)
     }