Brightness: set brightness by "openfdelight" service

app/src/main/aidl/android/openfde/ILight.aidl

@@ -0,0 +1,22 @@
+/*
+**
+** Copyright (C) 2021 The WayDroid Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+package android.openfde;
+interface ILight {
+    int setBacklight(int brightness);
+    int getBacklight();
+}

app/src/main/java/com/boringdroid/systemui/utils/Light.java

@@ -0,0 +1,76 @@
+package com.boringdroid.systemui.utils;
+
+import android.content.Context;
+import android.openfde.ILight;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceManager;
+import android.util.Log;
+
+public class Light {
+    private static final String TAG = "openfdelight";
+    public static final String LIGHT_SERVICE = "openfdelight";
+
+    /**
+     * Unable to determine status, an error occured
+     */
+    public static final int ERROR_UNDEFINED = -1;
+
+    private static ILight sService;
+    private static Light sInstance;
+
+    private Context mContext;
+
+    private Light(Context context) {
+        mContext = context == null ? null : context.getApplicationContext();
+        sService = getService();
+    }
+
+    public static Light getInstance(Context context) {
+        if (sInstance == null) {
+            sInstance = new Light(context);
+        }
+        return sInstance;
+    }
+
+    public static ILight getService() {
+        if (sService != null) {
+            return sService;
+        }
+        IBinder b = ServiceManager.getService(LIGHT_SERVICE);
+
+        if (b == null) {
+            Log.e(TAG, "null service. SAD!");
+            return null;
+        }
+
+        sService = ILight.Stub.asInterface(b);
+        return sService;
+    }
+
+    public int setBacklight(int brightness) {
+        ILight service = getService();
+        if (service == null) {
+            return ERROR_UNDEFINED;
+        }
+        try {
+            return service.setBacklight(brightness);
+        } catch (RemoteException e) {
+            Log.e(TAG, e.getLocalizedMessage(), e);
+        }
+        return ERROR_UNDEFINED;
+    }
+
+    public int getBacklight() {
+        ILight service = getService();
+        if (service == null) {
+            return ERROR_UNDEFINED;
+        }
+        try {
+            return service.getBacklight();
+        } catch (RemoteException e) {
+            Log.e(TAG, e.getLocalizedMessage(), e);
+        }
+        return ERROR_UNDEFINED;
+    }
+}

app/src/main/java/com/boringdroid/systemui/utils/Utils.kt

@@ -400,17 +400,8 @@ object Utils {
     }
 
     fun getScreenBrightness(context: Context): Int {
-        return try {
-            // 获取系统亮度值（范围 0-255）
-            val brightness = Settings.System.getInt(
-                context.contentResolver,
-                Settings.System.SCREEN_BRIGHTNESS
-            )
-            brightness
-        } catch (e: Settings.SettingNotFoundException) {
-            // 如果设置不存在，返回默认值（如 128）
-            128
-        }
+        val backlight = Light.getInstance(context).backlight
+        return if (backlight > 0) backlight else 255
     }
 
     fun setScreenBrightness(context: Context, brightness: Int) {