diff --git a/app/src/main/java/com/casic/detector/common/extensions/String.kt b/app/src/main/java/com/casic/detector/common/extensions/String.kt
index c6d8862..4b058ec 100644
--- a/app/src/main/java/com/casic/detector/common/extensions/String.kt
+++ b/app/src/main/java/com/casic/detector/common/extensions/String.kt
@@ -142,7 +142,7 @@
 fun String.calculateCheckDigit(): String {
     var checksum = 0
     for (i in 1 until this.length - 3) {
-        checksum = checksum xor this[i].toInt()
+        checksum = checksum xor this[i].code
     }
 
     val hexChecksum = checksum.toString(16).uppercase(Locale.getDefault())

diff --git a/app/src/main/java/com/casic/detector/common/extensions/String.kt b/app/src/main/java/com/casic/detector/common/extensions/String.kt
index c6d8862..4b058ec 100644
--- a/app/src/main/java/com/casic/detector/common/extensions/String.kt
+++ b/app/src/main/java/com/casic/detector/common/extensions/String.kt
@@ -142,7 +142,7 @@
 fun String.calculateCheckDigit(): String {
     var checksum = 0
     for (i in 1 until this.length - 3) {
-        checksum = checksum xor this[i].toInt()
+        checksum = checksum xor this[i].code
     }
 
     val hexChecksum = checksum.toString(16).uppercase(Locale.getDefault())
diff --git a/app/src/main/java/com/casic/detector/common/service/NtripConnectService.kt b/app/src/main/java/com/casic/detector/common/service/NtripConnectService.kt
index 4b09b42..5916711 100644
--- a/app/src/main/java/com/casic/detector/common/service/NtripConnectService.kt
+++ b/app/src/main/java/com/casic/detector/common/service/NtripConnectService.kt
@@ -113,7 +113,7 @@
             if (result.contains("ICY 200 OK")) {
                 "高精度定位服务连接成功".show(this)
                 //连接服务即打开串口
-                this.outStream = serialPortService?.getOutputStream()
+                outStream = serialPortService?.getOutputStream()
             }
         } else {
             "收到千寻数据返回，长度：${data.size}".show(this)
@@ -135,11 +135,16 @@
             val byteArray = "$account:$pwd".toByteArray()
             val base64 = android.util.Base64.encodeToString(byteArray, android.util.Base64.DEFAULT)
 
-            val msg = NtripAuthorizationCreator().append("GET /RTCM32_GGB HTTP/1.1")
-                .append("Host: ${LocaleConstant.QX_RTK_HOST}").append("Ntrip-Version: Ntrip/2.0")
-                .append("User-Agent: NTRIP GNSSInternetRadio 2.0.10").append("Accept: */*")
-                .append("Connection: close").append("Accept:*/*")
-                .append("Authorization: Basic $base64").toString()
+            val msg = NtripAuthorizationCreator()
+                .append("GET /RTCM32_GGB HTTP/1.1")
+                .append("Host: ${LocaleConstant.QX_RTK_HOST}")
+                .append("Ntrip-Version: Ntrip/2.0")
+                .append("User-Agent: NTRIP GNSSInternetRadio 2.0.10")
+                .append("Accept: */*")
+                .append("Connection: close")
+                .append("Accept:*/*")
+                .append("Authorization: Basic $base64")
+                .toString()
 
             val byteBuf = Unpooled.wrappedBuffer(msg.toByteArray())
             socketClient.sendData(byteBuf)
@@ -155,8 +160,12 @@
             LocaleConstant.RTK_PORT, "8003"
         ) as String
 
-        socketClient = SocketClient.Builder().setHostname(remoteHost).setPort(remotePort.toInt())
-            .setTimeout(5000).setOnSocketListener(this).build()
+        socketClient = SocketClient.Builder()
+            .setHostname(remoteHost)
+            .setPort(remotePort.toInt())
+            .setTimeout(5000)
+            .setOnSocketListener(this)
+            .build()
         socketClient.connect()
     }