diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 6452a95..94266cf 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     package="com.yinuo.safetywatcher">
 
     <uses-feature
@@ -8,7 +9,13 @@
 
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
-    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
+    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
+
+    <!-- 修改系统屏幕亮度 -->
+    <uses-permission
+        android:name="android.permission.WRITE_SETTINGS"
+        tools:ignore="ProtectedPermissions" />
+
 
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
@@ -41,43 +48,43 @@
         <activity
             android:name=".watcher.ui.SettingActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.CloudActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.WarnDataActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.SensorActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.SensorDataActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.SensorSettingActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.QueryDataActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.TimeSettingActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.LightSettingActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
         <activity
             android:name=".watcher.ui.SensorThresholdSetActivity"
             android:exported="false"
-            android:screenOrientation="landscape"/>
+            android:screenOrientation="landscape" />
 
         <activity
             android:name=".MainActivity"
diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/LightSettingActivity.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/LightSettingActivity.kt
index 0832c38..da3e0d7 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/LightSettingActivity.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/ui/LightSettingActivity.kt
@@ -1,14 +1,16 @@
 package com.yinuo.safetywatcher.watcher.ui
 
+import android.provider.Settings
 import android.view.View
+import android.widget.SeekBar
+import android.widget.SeekBar.OnSeekBarChangeListener
 import com.yinuo.safetywatcher.R
 import com.yinuo.safetywatcher.databinding.ActivityLightSettingBinding
-import com.yinuo.safetywatcher.databinding.ActivitySensorBinding
 import com.yinuo.safetywatcher.watcher.base.NoOptionsActivity
 
 class LightSettingActivity : NoOptionsActivity() {
 
-    private val mBingding by lazy {
+    private val mBinding by lazy {
         ActivityLightSettingBinding.inflate(layoutInflater)
     }
 
@@ -17,9 +19,96 @@ class LightSettingActivity : NoOptionsActivity() {
     }
 
     override fun generateContentView(): View {
-        return mBingding.root
+        return mBinding.root
     }
 
     override fun initView() {
+        val initLight = getScreenBrightness()
+        mBinding.sbLight.progress = initLight
+        mBinding.sbLight.setOnSeekBarChangeListener(object : OnSeekBarChangeListener {
+            override fun onProgressChanged(p0: SeekBar?, p1: Int, p2: Boolean) {
+                setWindowBrightness(p1)
+            }
+
+            override fun onStartTrackingTouch(p0: SeekBar?) {
+            }
+
+            override fun onStopTrackingTouch(p0: SeekBar?) {
+            }
+        })
+
+        mBinding.tvCancel.setOnClickListener {
+            setWindowBrightness(initLight)
+        }
+        mBinding.tvConfirm.setOnClickListener {
+            setScreenBrightness(mBinding.sbLight.progress)
+        }
+    }
+
+
+    /**
+     * 获取系统屏幕亮度(0-255)
+     */
+    private fun getScreenBrightness(): Int {
+        try {
+            return Settings.System.getInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS)
+        } catch (e: Settings.SettingNotFoundException) {
+            e.printStackTrace()
+        }
+        return 0
+    }
+
+    /**
+     * 设置当前应用屏幕亮度，只当前有效
+     */
+    private fun setWindowBrightness(brightness: Int) {
+        val window = window
+        val lp = window.attributes
+        lp.screenBrightness = brightness / 255.0f
+        window.attributes = lp
+    }
+
+
+    /**
+     * 设置系统屏幕亮度，影响所有页面和app
+     * 注意：这种方式是需要手动权限的（android.permission.WRITE_SETTINGS）
+     */
+    private fun setScreenBrightness(brightness: Int) {
+        try {
+            //先检测调节模式
+            setScreenManualMode()
+            //再设置
+            Settings.System.putInt(
+                this.contentResolver,
+                Settings.System.SCREEN_BRIGHTNESS,
+                brightness
+            )
+        } catch (e: Settings.SettingNotFoundException) {
+            e.printStackTrace()
+        }
+    }
+
+
+    /**
+     * 设置系统亮度调节模式(SCREEN_BRIGHTNESS_MODE)
+     * SCREEN_BRIGHTNESS_MODE_MANUAL 手动调节
+     * SCREEN_BRIGHTNESS_MODE_AUTOMATIC 自动调节
+     */
+    private fun setScreenManualMode() {
+        try {
+            //获取当前系统亮度调节模式
+            val mode =
+                Settings.System.getInt(this.contentResolver, Settings.System.SCREEN_BRIGHTNESS_MODE)
+            //如果是自动，则改为手动
+            if (mode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC) {
+                Settings.System.putInt(
+                    this.contentResolver,
+                    Settings.System.SCREEN_BRIGHTNESS_MODE,
+                    Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL
+                )
+            }
+        } catch (e: Settings.SettingNotFoundException) {
+            e.printStackTrace()
+        }
     }
 }
\ No newline at end of file
diff --git a/app/src/main/res/drawable/cancel_btn_bg.xml b/app/src/main/res/drawable/cancel_btn_bg.xml
new file mode 100644
index 0000000..e05a7c2
--- /dev/null
+++ b/app/src/main/res/drawable/cancel_btn_bg.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/_2A4284_30" />
+    <corners
+        android:bottomRightRadius="0dp"
+        android:bottomLeftRadius="@dimen/_20dp"
+        android:topLeftRadius="0dp"
+        android:topRightRadius="0dp"/>
+</shape>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/confirm_btn_bg.xml b/app/src/main/res/drawable/confirm_btn_bg.xml
new file mode 100644
index 0000000..3caee33
--- /dev/null
+++ b/app/src/main/res/drawable/confirm_btn_bg.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="@color/_2A4284" />
+    <corners
+        android:bottomRightRadius="@dimen/_20dp"
+        android:bottomLeftRadius="0dp"
+        android:topLeftRadius="0dp"
+        android:topRightRadius="0dp"/>
+</shape>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/light_seekbar_progress_drawable.xml b/app/src/main/res/drawable/light_seekbar_progress_drawable.xml
new file mode 100644
index 0000000..8107ddc
--- /dev/null
+++ b/app/src/main/res/drawable/light_seekbar_progress_drawable.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!--定义seekbar滑动条的底色-->
+    <item android:id="@android:id/background">
+        <shape>
+            <corners android:radius="@dimen/_20dp" />
+            <gradient
+                android:angle="270"
+                android:centerColor="@color/_505971"
+                android:centerY="0.75"
+                android:endColor="@color/_505971"
+                android:startColor="@color/_505971" />
+        </shape>
+    </item>
+    <!--定义seekbar滑动条进度颜色-->
+    <item android:id="@android:id/progress">
+        <clip>
+            <shape>
+                <corners android:radius="@dimen/_20dp" />
+                <solid android:color="@color/white" />
+            </shape>
+        </clip>
+    </item>
+</layer-list>
diff --git a/app/src/main/res/layout/activity_light_setting.xml b/app/src/main/res/layout/activity_light_setting.xml
index d829e29..cc3ae92 100644
--- a/app/src/main/res/layout/activity_light_setting.xml
+++ b/app/src/main/res/layout/activity_light_setting.xml
@@ -1,7 +1,60 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:gravity="center_horizontal"
+    android:orientation="vertical">
 
+    <RelativeLayout
+        android:layout_width="@dimen/_960dp"
+        android:layout_height="@dimen/_511dp"
+        android:layout_marginTop="@dimen/_201dp"
+        android:background="@drawable/warn_setting_btn_bg">
+
+        <SeekBar
+            android:id="@+id/sb_light"
+            style="@style/LightSeekbarStyle"
+            android:layout_width="@dimen/_630dp"
+            android:layout_height="@dimen/_100dp"
+            android:layout_marginStart="@dimen/_140dp"
+            android:layout_marginTop="@dimen/_160dp"
+            android:max="255"
+            android:min="0"
+            android:padding="0dp"
+            android:progress="20" />
+
+        <TextView
+            android:id="@+id/tv_light"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_alignParentEnd="true"
+            android:layout_marginTop="@dimen/_185dp"
+            android:layout_marginEnd="@dimen/_132dp"
+            android:text="55%"
+            android:textColor="@color/white"
+            android:textSize="@dimen/_36dp" />
+
+        <TextView
+            android:id="@+id/tv_cancel"
+            android:layout_width="@dimen/_480dp"
+            android:layout_height="@dimen/_81dp"
+            android:layout_alignParentBottom="true"
+            android:background="@drawable/cancel_btn_bg"
+            android:gravity="center"
+            android:text="@string/cancel"
+            android:textColor="@color/white_30"
+            android:textSize="@dimen/_36dp" />
+
+        <TextView
+            android:id="@+id/tv_confirm"
+            android:layout_width="@dimen/_480dp"
+            android:layout_height="@dimen/_81dp"
+            android:layout_alignParentEnd="true"
+            android:layout_alignParentBottom="true"
+            android:background="@drawable/confirm_btn_bg"
+            android:gravity="center"
+            android:text="@string/confirm"
+            android:textColor="@color/white"
+            android:textSize="@dimen/_36dp" />
+    </RelativeLayout>
 </LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/mipmap-hdpi/ic_light.png b/app/src/main/res/mipmap-hdpi/ic_light.png
new file mode 100644
index 0000000..5abffcc
Binary files /dev/null and b/app/src/main/res/mipmap-hdpi/ic_light.png differ
diff --git a/app/src/main/res/values/colors.xml b/app/src/main/res/values/colors.xml
index e550f20..ae94474 100644
--- a/app/src/main/res/values/colors.xml
+++ b/app/src/main/res/values/colors.xml
@@ -6,6 +6,7 @@
 
     <color name="white">#ffffff</color>
     <color name="white_20">#33ffffff</color>
+    <color name="white_30">#4Cffffff</color>
     <color name="colorTheme">#1ED5CA</color>
     <color name="black_overlay">#66000000</color>
 
@@ -14,7 +15,9 @@
     <color name="_242f4d_30">#4C242F4D</color>
     <color name="_303852">#303852</color>
     <color name="_2A4284">#2A4284</color>
+    <color name="_2A4284_30">#4C2A4284</color>
     <color name="_842A2A">#842A2A</color>
+    <color name="_505971">#505971</color>
 
     <color name="color_ok">#01E41C</color>
     <color name="color_offline">#999999</color>
diff --git a/app/src/main/res/values/dimens.xml b/app/src/main/res/values/dimens.xml
index 7f368d1..6e17cda 100644
--- a/app/src/main/res/values/dimens.xml
+++ b/app/src/main/res/values/dimens.xml
@@ -46,4 +46,11 @@
     <dimen name="_20dp">20px</dimen>
     <dimen name="_17dp">17px</dimen>
     <dimen name="_300dp">300px</dimen>
+    <dimen name="_960dp">960px</dimen>
+    <dimen name="_511dp">511px</dimen>
+    <dimen name="_201dp">201px</dimen>
+    <dimen name="_140dp">140px</dimen>
+    <dimen name="_630dp">630px</dimen>
+    <dimen name="_81dp">81px</dimen>
+    <dimen name="_480dp">480px</dimen>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 26489ee..63e3689 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -34,6 +34,8 @@
     <string name="sensor_name_txt">传感器名称</string>
     <string name="sensor_step_txt">传感器量程</string>
     <string name="sensor_type_txt">传感器种类</string>
+    <string name="cancel">取消</string>
+    <string name="confirm">确认</string>
 
     <string-array name="excel_column">
         <item>时间</item>
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 66c4e6e..70e8928 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -27,7 +27,7 @@
     </style>
 
     <!--自定义seekbarstyle-->
-    <style name="CustomSeekbarStyle" >
+    <style name="CustomSeekbarStyle">
         <item name="android:maxHeight">4dp</item>
         <item name="android:indeterminateOnly">false</item>
         <item name="android:indeterminateDrawable">@color/colorAccent</item>
@@ -35,4 +35,15 @@
         <item name="android:minHeight">10dp</item>
         <item name="android:thumb">@drawable/new_thumb</item>
     </style>
+
+
+    <!--自定义seekbarstyle-->
+    <style name="LightSeekbarStyle">
+        <item name="android:minHeight">@dimen/_100dp</item>
+        <item name="android:maxHeight">@dimen/_100dp</item>
+        <item name="android:indeterminateOnly">false</item>
+        <item name="android:indeterminateDrawable">@color/colorAccent</item>
+        <item name="android:progressDrawable">@drawable/light_seekbar_progress_drawable</item>
+        <item name="android:thumb">@null</item>
+    </style>
 </resources>