diff --git a/app/src/main/java/com/casic/endoscope/view/MainActivity.kt b/app/src/main/java/com/casic/endoscope/view/MainActivity.kt
index 39709c9..635bb97 100644
--- a/app/src/main/java/com/casic/endoscope/view/MainActivity.kt
+++ b/app/src/main/java/com/casic/endoscope/view/MainActivity.kt
@@ -67,6 +67,7 @@
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.onCompletion
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import java.io.File
@@ -469,9 +470,11 @@
                     val serialSend = hkSDK.NET_DVR_SerialSend(
                         serialHandle, 1, horizontalCommand, horizontalCommand.size
                     )
-
                     delay(500)
                     emit(serialSend)
+                }.onCompletion {
+                    //关闭通道
+                    hkSDK.NET_DVR_SerialStop(serialHandle)
                 }.collect { value ->
                     if (value) {
                         //向透明通道发送数据，垂直
@@ -479,16 +482,16 @@
                         val serialSend = hkSDK.NET_DVR_SerialSend(
                             serialHandle, 1, verticalCommand, verticalCommand.size
                         )
-
-                        delay(500)
                         if (!serialSend) {
-                            "垂直角度指令执行失败".show(context)
+                            withContext(Dispatchers.Main) {
+                                "垂直角度指令执行失败".show(context)
+                            }
                         }
-
-                        //关闭通道
-                        hkSDK.NET_DVR_SerialStop(serialHandle)
+                        delay(500)
                     } else {
-                        "水平角度指令执行失败".show(context)
+                        withContext(Dispatchers.Main) {
+                            "水平角度指令执行失败".show(context)
+                        }
                     }
                 }
             }