diff --git a/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt b/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
index 0404dce..edfc98f 100644
--- a/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
+++ b/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
@@ -41,7 +41,7 @@
     private val kTag = "HikVisionActivity"
     private val context = this@HikVisionActivity
     private val hkSDK by lazy { HCNetSDK.getInstance() }
-    private val wifiManager by lazy { applicationContext.getSystemService<WifiManager>() }
+    private val wifiManager by lazy { getSystemService<WifiManager>() }
     private val wifiSsids = ArrayList<String>()
     private val cameraItems = ArrayList<String>()
     private var previewHandle = -1

diff --git a/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt b/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
index 0404dce..edfc98f 100644
--- a/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
+++ b/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
@@ -41,7 +41,7 @@
     private val kTag = "HikVisionActivity"
     private val context = this@HikVisionActivity
     private val hkSDK by lazy { HCNetSDK.getInstance() }
-    private val wifiManager by lazy { applicationContext.getSystemService<WifiManager>() }
+    private val wifiManager by lazy { getSystemService<WifiManager>() }
     private val wifiSsids = ArrayList<String>()
     private val cameraItems = ArrayList<String>()
     private var previewHandle = -1
diff --git a/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt b/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt
index 52edf7b..5fcd595 100644
--- a/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt
+++ b/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt
@@ -35,7 +35,7 @@
 
     private val kTag = "MethaneActivity"
     private val context = this@MethaneActivity
-    private val wifiManager by lazy { applicationContext.getSystemService<WifiManager>() }
+    private val wifiManager by lazy { getSystemService<WifiManager>() }
     private val udpClient by lazy { UdpClient() }
     private val wifiSsids = ArrayList<String>()
     private val gasTreeItems = ArrayList<String>()

diff --git a/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt b/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
index 0404dce..edfc98f 100644
--- a/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
+++ b/app/src/main/java/com/casic/br/operationsite/view/HikVisionActivity.kt
@@ -41,7 +41,7 @@
     private val kTag = "HikVisionActivity"
     private val context = this@HikVisionActivity
     private val hkSDK by lazy { HCNetSDK.getInstance() }
-    private val wifiManager by lazy { applicationContext.getSystemService<WifiManager>() }
+    private val wifiManager by lazy { getSystemService<WifiManager>() }
     private val wifiSsids = ArrayList<String>()
     private val cameraItems = ArrayList<String>()
     private var previewHandle = -1
diff --git a/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt b/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt
index 52edf7b..5fcd595 100644
--- a/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt
+++ b/app/src/main/java/com/casic/br/operationsite/view/MethaneActivity.kt
@@ -35,7 +35,7 @@
 
     private val kTag = "MethaneActivity"
     private val context = this@MethaneActivity
-    private val wifiManager by lazy { applicationContext.getSystemService<WifiManager>() }
+    private val wifiManager by lazy { getSystemService<WifiManager>() }
     private val udpClient by lazy { UdpClient() }
     private val wifiSsids = ArrayList<String>()
     private val gasTreeItems = ArrayList<String>()
diff --git a/app/src/main/res/layout/activity_methane.xml b/app/src/main/res/layout/activity_methane.xml
index e527312..8063b91 100644
--- a/app/src/main/res/layout/activity_methane.xml
+++ b/app/src/main/res/layout/activity_methane.xml
@@ -156,9 +156,8 @@
 
         <com.pengxh.kt.lite.widget.SteeringWheelController
             android:id="@+id/wheelController"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_margin="@dimen/dp_7"
+            android:layout_width="180dp"
+            android:layout_height="180dp"
             app:controller_borderColor="@color/mainThemeColor"
             app:controller_borderStroke="7"
             app:controller_outerCircleDiameter="175" />