在有的设备中没有永不息屏的选项，客户需要这时就需要自己来添加，是需要将screen_timeout_entries文件给为dream_timeout_entries文件，这些都是系统自带的，替换就可以。另外在PhoneWindowManager和PowerManagerService进行更改。

--- frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java    (版本 7704)
+++ frameworks/base/services/core/java/com/android/server/policy/PhoneWindowManager.java    (版本 7708)
@@ -4921,7 +4921,11 @@
                 if (enable) {
                     if (localLOGV) Log.v(TAG, "setting lockscreen timer");
                     mHandler.removeCallbacks(mScreenLockTimeout); // remove any pending requests
-                    mHandler.postDelayed(mScreenLockTimeout, mLockScreenTimeout);
+                     //added by wxw start
+                 if(mLockScreenTimeout != 0){
+                      mHandler.postDelayed(mScreenLockTimeout, mLockScreenTimeout);
+                    }
+           //added by wxw end
                 } else {
                     if (localLOGV) Log.v(TAG, "clearing lockscreen timer");
                     mHandler.removeCallbacks(mScreenLockTimeout);

===================================================================
--- frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java    (版本 7704)
+++ frameworks/base/services/core/java/com/android/server/power/PowerManagerService.java    (版本 7708)
@@ -2598,7 +2598,9 @@
                     groupUserActivitySummary = USER_ACTIVITY_SCREEN_DREAM;
                     groupNextTimeout = -1;
                 }
-
+             //added by wxw start
+            
+            if(mScreenOffTimeoutSetting != 0){
                 if ((groupUserActivitySummary & USER_ACTIVITY_SCREEN_BRIGHT) != 0
                         && (mDisplayGroupPowerStateMapper.getWakeLockSummaryLocked(groupId)
                         & WAKE_LOCK_STAY_AWAKE) == 0) {
@@ -2613,6 +2615,10 @@
                 } else if (groupNextTimeout != -1) {
                     nextTimeout = Math.min(nextTimeout, groupNextTimeout);
                 }
+             }else{
+                    groupUserActivitySummary |= USER_ACTIVITY_SCREEN_BRIGHT;
+        }
+       //added by wxw end
             }
 
             mDisplayGroupPowerStateMapper.setUserActivitySummaryLocked(groupId,

===================================================================
--- vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/display/ScreenTimeoutPreferenceController.java   (版本 7651)
+++ vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/display/ScreenTimeoutPreferenceController.java   (版本 7652)
@@ -45,8 +45,8 @@
 
     public ScreenTimeoutPreferenceController(Context context, String key) {
         super(context, key);
-        mTimeoutEntries = context.getResources().getStringArray(R.array.screen_timeout_entries);
-        mTimeoutValues = context.getResources().getStringArray(R.array.screen_timeout_values);
+        mTimeoutEntries = context.getResources().getStringArray(R.array.dream_timeout_entries);
+        mTimeoutValues = context.getResources().getStringArray(R.array.dream_timeout_values);
     }
 
     @Override

===================================================================
--- vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/display/ScreenTimeoutSettings.java   (版本 7651)
+++ vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/display/ScreenTimeoutSettings.java   (版本 7652)
@@ -114,8 +114,8 @@
     public void onAttach(Context context) {
         super.onAttach(context);
         mContext = context;
-        mInitialEntries = getResources().getStringArray(R.array.screen_timeout_entries);
-        mInitialValues = getResources().getStringArray(R.array.screen_timeout_values);
+        mInitialEntries = getResources().getStringArray(R.array.dream_timeout_entries);
+        mInitialValues = getResources().getStringArray(R.array.dream_timeout_values);
         mAdaptiveSleepController = new AdaptiveSleepPreferenceController(context);
         mAdaptiveSleepPermissionController = new AdaptiveSleepPermissionPreferenceController(
                 context);