diff --git a/api/current.txt b/api/current.txt
index af61de8688469..6c35586aa1e91 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -2086,6 +2086,21 @@ package android {
     field public static final int Theme_Light_Panel = 16973914; // 0x103005a
     field public static final int Theme_Light_WallpaperSettings = 16973922; // 0x1030062
     field public static final int Theme_Material = 16974372; // 0x1030224
+    field public static final int Theme_Material_DayNight = 16974548; // 0x10302d4
+    field public static final int Theme_Material_DayNight_DarkActionBar = 16974549; // 0x10302d5
+    field public static final int Theme_Material_DayNight_Dialog = 16974550; // 0x10302d6
+    field public static final int Theme_Material_DayNight_DialogWhenLarge = 16974556; // 0x10302dc
+    field public static final int Theme_Material_DayNight_DialogWhenLarge_NoActionBar = 16974557; // 0x10302dd
+    field public static final int Theme_Material_DayNight_Dialog_Alert = 16974551; // 0x10302d7
+    field public static final int Theme_Material_DayNight_Dialog_MinWidth = 16974552; // 0x10302d8
+    field public static final int Theme_Material_DayNight_Dialog_NoActionBar = 16974553; // 0x10302d9
+    field public static final int Theme_Material_DayNight_Dialog_NoActionBar_MinWidth = 16974554; // 0x10302da
+    field public static final int Theme_Material_DayNight_Dialog_Presentation = 16974555; // 0x10302db
+    field public static final int Theme_Material_DayNight_NoActionBar = 16974558; // 0x10302de
+    field public static final int Theme_Material_DayNight_NoActionBar_Fullscreen = 16974559; // 0x10302df
+    field public static final int Theme_Material_DayNight_NoActionBar_Overscan = 16974560; // 0x10302e0
+    field public static final int Theme_Material_DayNight_NoActionBar_TranslucentDecor = 16974561; // 0x10302e1
+    field public static final int Theme_Material_DayNight_Panel = 16974562; // 0x10302e2
     field public static final int Theme_Material_Dialog = 16974373; // 0x1030225
     field public static final int Theme_Material_DialogWhenLarge = 16974379; // 0x103022b
     field public static final int Theme_Material_DialogWhenLarge_NoActionBar = 16974380; // 0x103022c
diff --git a/api/system-current.txt b/api/system-current.txt
index 6b5060384eac7..d5a8f2726b09c 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -2165,6 +2165,21 @@ package android {
     field public static final int Theme_Light_Panel = 16973914; // 0x103005a
     field public static final int Theme_Light_WallpaperSettings = 16973922; // 0x1030062
     field public static final int Theme_Material = 16974372; // 0x1030224
+    field public static final int Theme_Material_DayNight = 16974548; // 0x10302d4
+    field public static final int Theme_Material_DayNight_DarkActionBar = 16974549; // 0x10302d5
+    field public static final int Theme_Material_DayNight_Dialog = 16974550; // 0x10302d6
+    field public static final int Theme_Material_DayNight_DialogWhenLarge = 16974556; // 0x10302dc
+    field public static final int Theme_Material_DayNight_DialogWhenLarge_NoActionBar = 16974557; // 0x10302dd
+    field public static final int Theme_Material_DayNight_Dialog_Alert = 16974551; // 0x10302d7
+    field public static final int Theme_Material_DayNight_Dialog_MinWidth = 16974552; // 0x10302d8
+    field public static final int Theme_Material_DayNight_Dialog_NoActionBar = 16974553; // 0x10302d9
+    field public static final int Theme_Material_DayNight_Dialog_NoActionBar_MinWidth = 16974554; // 0x10302da
+    field public static final int Theme_Material_DayNight_Dialog_Presentation = 16974555; // 0x10302db
+    field public static final int Theme_Material_DayNight_NoActionBar = 16974558; // 0x10302de
+    field public static final int Theme_Material_DayNight_NoActionBar_Fullscreen = 16974559; // 0x10302df
+    field public static final int Theme_Material_DayNight_NoActionBar_Overscan = 16974560; // 0x10302e0
+    field public static final int Theme_Material_DayNight_NoActionBar_TranslucentDecor = 16974561; // 0x10302e1
+    field public static final int Theme_Material_DayNight_Panel = 16974562; // 0x10302e2
     field public static final int Theme_Material_Dialog = 16974373; // 0x1030225
     field public static final int Theme_Material_DialogWhenLarge = 16974379; // 0x103022b
     field public static final int Theme_Material_DialogWhenLarge_NoActionBar = 16974380; // 0x103022c
diff --git a/core/java/android/app/UiModeManager.java b/core/java/android/app/UiModeManager.java
index 0a255f7f1af1a..0f6ce1227ca45 100644
--- a/core/java/android/app/UiModeManager.java
+++ b/core/java/android/app/UiModeManager.java
@@ -219,10 +219,9 @@ public class UiModeManager {
     }
 
     /**
-     * Returns the currently configured night mode.
-     *
-     * @return {@link #MODE_NIGHT_NO}, {@link #MODE_NIGHT_YES}, or
-     *  {@link #MODE_NIGHT_AUTO}.  When an error occurred -1 is returned.
+     * @return the currently configured night mode. May be one of
+     *         {@link #MODE_NIGHT_NO}, {@link #MODE_NIGHT_YES},
+     *         {@link #MODE_NIGHT_AUTO}, or -1 on error.
      */
     public int getNightMode() {
         if (mService != null) {
diff --git a/core/res/res/values-night/themes_material_daynight.xml b/core/res/res/values-night/themes_material_daynight.xml
new file mode 100644
index 0000000000000..da870b7ea6727
--- /dev/null
+++ b/core/res/res/values-night/themes_material_daynight.xml
@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 The Android Open Source 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.
+-->
+
+<!--
+===============================================================
+                        PLEASE READ
+===============================================================
+
+The Material themes must not be modified in order to pass CTS.
+Many related themes and styles depend on other values defined in this file.
+If you would like to provide custom themes and styles for your device,
+please see themes_device_defaults.xml.
+
+===============================================================
+                        PLEASE READ
+===============================================================
+ -->
+<resources>
+
+    <!-- Material theme (day/night version) for activities. -->
+    <style name="Theme.Material.DayNight" parent="Theme.Material" />
+
+    <!-- Variant of Material.DayNight that has a solid (opaque) action bar
+         with an inverse color profile. The dark action bar sharply stands out against
+         the light content (when applicable).  -->
+    <style name="Theme.Material.DayNight.DarkActionBar" parent="Theme.Material" />
+
+    <!-- Variant of Material.DayNight with no action bar.  -->
+    <style name="Theme.Material.DayNight.NoActionBar" parent="Theme.Material.NoActionBar" />
+
+    <!-- Variant of Material.DayNight that has no title bar and fills
+         the entire screen. This theme
+         sets {@link android.R.attr#windowFullscreen} to true.  -->
+    <style name="Theme.Material.DayNight.NoActionBar.Fullscreen" parent="Theme.Material.NoActionBar.Fullscreen" />
+
+    <!-- Variant of Material.DayNight that has no title bar and fills
+         the entire screen and extends into the display overscan region. This theme
+         sets {@link android.R.attr#windowFullscreen} and {@link android.R.attr#windowOverscan}
+         to true. -->
+    <style name="Theme.Material.DayNight.NoActionBar.Overscan" parent="Theme.Material.NoActionBar.Overscan" />
+
+    <!-- Variant of Material.DayNight that has no title bar and translucent
+         system decor. This theme sets {@link android.R.attr#windowTranslucentStatus} and
+         {@link android.R.attr#windowTranslucentNavigation} to true. -->
+    <style name="Theme.Material.DayNight.NoActionBar.TranslucentDecor" parent="Theme.Material.NoActionBar.TranslucentDecor" />
+
+    <!-- Default Material.DayNight theme for panel windows. This removes all extraneous
+         window decorations, so you basically have an empty rectangle in which
+         to place your content. It makes the window floating, with a transparent
+         background, and turns off dimming behind the window. -->
+    <style name="Theme.Material.DayNight.Panel" parent="Theme.Material.Panel" />
+
+    <!-- Material theme (day/night version) for dialog windows and activities,
+         which is used by the {@link android.app.Dialog} class. This changes
+         the window to be floating (not fill the entire screen), and puts a
+         frame around its contents. You can set this theme on an activity if
+         you would like to make an activity that looks like a Dialog. -->
+    <style name="Theme.Material.DayNight.Dialog" parent="Theme.Material.DayNight.BaseDialog" />
+    <style name="Theme.Material.DayNight.BaseDialog" parent="Theme.Material.BaseDialog" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog that has a nice minimum width for
+         a regular dialog. -->
+    <style name="Theme.Material.DayNight.Dialog.MinWidth" parent="Theme.Material.Dialog.MinWidth" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog that does not include a title bar. -->
+    <style name="Theme.Material.DayNight.Dialog.NoActionBar" parent="Theme.Material.Dialog.NoActionBar" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog.NoActionBar that has a nice minimum width for
+         a regular dialog. -->
+    <style name="Theme.Material.DayNight.Dialog.NoActionBar.MinWidth" parent="Theme.Material.Dialog.NoActionBar.MinWidth" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog that has a fixed size. -->
+    <style name="Theme.Material.DayNight.Dialog.FixedSize" parent="Theme.Material.Dialog.FixedSize" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog.NoActionBar that has a fixed size. -->
+    <style name="Theme.Material.DayNight.Dialog.NoActionBar.FixedSize" parent="Theme.Material.Dialog.NoActionBar.FixedSize" />
+
+    <!-- Theme for a window that will be displayed either full-screen on
+         smaller screens (small, normal) or as a dialog on larger screens
+         (large, xlarge). -->
+    <style name="Theme.Material.DayNight.DialogWhenLarge" parent="Theme.Material.DialogWhenLarge" />
+
+    <!-- Theme for a window without an action bar that will be displayed either full-screen
+         on smaller screens (small, normal) or as a dialog on larger screens
+         (large, xlarge). -->
+    <style name="Theme.Material.DayNight.DialogWhenLarge.NoActionBar" parent="Theme.Material.DialogWhenLarge.NoActionBar" />
+
+    <!-- Theme for a presentation window on a secondary display. -->
+    <style name="Theme.Material.DayNight.Dialog.Presentation" parent="Theme.Material.Dialog.Presentation" />
+
+    <!-- Material user theme for alert dialog windows, which is used by the
+         {@link android.app.AlertDialog} class. -->
+    <style name="Theme.Material.DayNight.Dialog.Alert" parent="Theme.Material.DayNight.Dialog.BaseAlert" />
+    <style name="Theme.Material.DayNight.Dialog.BaseAlert" parent="Theme.Material.Dialog.BaseAlert" />
+
+    <style name="Theme.Material.DayNight.SearchBar" parent="Theme.Material.SearchBar" />
+    <style name="Theme.Material.DayNight.CompactMenu" parent="Theme.Material.CompactMenu" />
+
+</resources>
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index f2d9de8a9ad36..4c25e7dff1ec9 100755
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -632,6 +632,14 @@
          Any other values will have surprising consequences. -->
     <integer name="config_defaultUiModeType">1</integer>
 
+    <!-- Control the default night mode to use when there is no other mode override set.
+         One of the following values (see UiModeManager.java):
+             0 - MODE_NIGHT_AUTO
+             1 - MODE_NIGHT_NO
+             2 - MODE_NIGHT_YES
+    -->
+    <integer name="config_defaultNightMode">1</integer>
+
     <!-- Indicate whether to allow the device to suspend when the screen is off
          due to the proximity sensor.  This resource should only be set to true
          if the sensor HAL correctly handles the proximity sensor as a wake-up source.
diff --git a/core/res/res/values/public.xml b/core/res/res/values/public.xml
index e2a0ec9ecaa3a..3ac7374ab4876 100644
--- a/core/res/res/values/public.xml
+++ b/core/res/res/values/public.xml
@@ -2617,4 +2617,20 @@
 
   <public type="style" name="Widget.Material.Button.Colored" />
 
+  <public type="style" name="Theme.Material.DayNight" />
+  <public type="style" name="Theme.Material.DayNight.DarkActionBar" />
+  <public type="style" name="Theme.Material.DayNight.Dialog" />
+  <public type="style" name="Theme.Material.DayNight.Dialog.Alert" />
+  <public type="style" name="Theme.Material.DayNight.Dialog.MinWidth" />
+  <public type="style" name="Theme.Material.DayNight.Dialog.NoActionBar" />
+  <public type="style" name="Theme.Material.DayNight.Dialog.NoActionBar.MinWidth" />
+  <public type="style" name="Theme.Material.DayNight.Dialog.Presentation" />
+  <public type="style" name="Theme.Material.DayNight.DialogWhenLarge" />
+  <public type="style" name="Theme.Material.DayNight.DialogWhenLarge.NoActionBar" />
+  <public type="style" name="Theme.Material.DayNight.NoActionBar" />
+  <public type="style" name="Theme.Material.DayNight.NoActionBar.Fullscreen" />
+  <public type="style" name="Theme.Material.DayNight.NoActionBar.Overscan" />
+  <public type="style" name="Theme.Material.DayNight.NoActionBar.TranslucentDecor" />
+  <public type="style" name="Theme.Material.DayNight.Panel" />
+
 </resources>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index f149cf9f2c402..b1cf0418746f9 100755
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -2167,4 +2167,5 @@
 
   <java-symbol type="xml" name="bookmarks" />
 
+  <java-symbol type="integer" name="config_defaultNightMode" />
 </resources>
diff --git a/core/res/res/values/themes_material.xml b/core/res/res/values/themes_material.xml
index 2b8ed5fa2eceb..57041fdd51b7c 100644
--- a/core/res/res/values/themes_material.xml
+++ b/core/res/res/values/themes_material.xml
@@ -1238,8 +1238,7 @@ please see themes_device_defaults.xml.
     </style>
 
     <!-- Default theme for Settings and activities launched from Settings. -->
-    <style name="Theme.Material.Settings" parent="Theme.Material.Light.DarkActionBar">
-        <item name="colorBackground">@color/white</item>
+    <style name="Theme.Material.Settings" parent="Theme.Material.DayNight.DarkActionBar">
         <item name="colorPrimary">@color/material_blue_grey_900</item>
         <item name="colorPrimaryDark">@color/material_blue_grey_950</item>
         <item name="colorAccent">@color/material_deep_teal_500</item>
@@ -1251,8 +1250,7 @@ please see themes_device_defaults.xml.
         <item name="panelMenuListTheme">@style/Theme.Material.Settings.CompactMenu</item>
     </style>
 
-    <style name="Theme.Material.Settings.BaseDialog" parent="Theme.Material.Light.BaseDialog">
-        <item name="colorBackground">@color/white</item>
+    <style name="Theme.Material.Settings.BaseDialog" parent="Theme.Material.DayNight.BaseDialog">
         <item name="colorPrimary">@color/material_blue_grey_900</item>
         <item name="colorPrimaryDark">@color/material_blue_grey_950</item>
         <item name="colorAccent">@color/material_deep_teal_500</item>
@@ -1260,8 +1258,7 @@ please see themes_device_defaults.xml.
 
     <style name="Theme.Material.Settings.Dialog" parent="Theme.Material.Settings.BaseDialog" />
 
-    <style name="Theme.Material.Settings.Dialog.BaseAlert" parent="Theme.Material.Light.Dialog.BaseAlert">
-        <item name="colorBackground">@color/white</item>
+    <style name="Theme.Material.Settings.Dialog.BaseAlert" parent="Theme.Material.DayNight.Dialog.BaseAlert">
         <item name="colorPrimary">@color/material_blue_grey_900</item>
         <item name="colorPrimaryDark">@color/material_blue_grey_950</item>
         <item name="colorAccent">@color/material_deep_teal_500</item>
@@ -1269,22 +1266,19 @@ please see themes_device_defaults.xml.
 
     <style name="Theme.Material.Settings.Dialog.Alert" parent="Theme.Material.Settings.Dialog.BaseAlert" />
 
-    <style name="Theme.Material.Settings.Dialog.Presentation" parent="Theme.Material.Light.Dialog.Presentation">
-        <item name="colorBackground">@color/white</item>
+    <style name="Theme.Material.Settings.Dialog.Presentation" parent="Theme.Material.DayNight.Dialog.Presentation">
         <item name="colorPrimary">@color/material_blue_grey_900</item>
         <item name="colorPrimaryDark">@color/material_blue_grey_950</item>
         <item name="colorAccent">@color/material_deep_teal_500</item>
     </style>
 
-    <style name="Theme.Material.Settings.SearchBar" parent="Theme.Material.Light.SearchBar">
-        <item name="colorBackground">@color/white</item>
+    <style name="Theme.Material.Settings.SearchBar" parent="Theme.Material.DayNight.SearchBar">
         <item name="colorPrimary">@color/material_blue_grey_900</item>
         <item name="colorPrimaryDark">@color/material_blue_grey_950</item>
         <item name="colorAccent">@color/material_deep_teal_500</item>
     </style>
 
-    <style name="Theme.Material.Settings.CompactMenu" parent="Theme.Material.Light.CompactMenu">
-        <item name="colorBackground">@color/white</item>
+    <style name="Theme.Material.Settings.CompactMenu" parent="Theme.Material.DayNight.CompactMenu">
         <item name="colorPrimary">@color/material_blue_grey_900</item>
         <item name="colorPrimaryDark">@color/material_blue_grey_950</item>
         <item name="colorAccent">@color/material_deep_teal_500</item>
diff --git a/core/res/res/values/themes_material_daynight.xml b/core/res/res/values/themes_material_daynight.xml
new file mode 100644
index 0000000000000..5d9b860f61ab8
--- /dev/null
+++ b/core/res/res/values/themes_material_daynight.xml
@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 The Android Open Source 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.
+-->
+
+<!--
+===============================================================
+                        PLEASE READ
+===============================================================
+
+The Material themes must not be modified in order to pass CTS.
+Many related themes and styles depend on other values defined in this file.
+If you would like to provide custom themes and styles for your device,
+please see themes_device_defaults.xml.
+
+===============================================================
+                        PLEASE READ
+===============================================================
+ -->
+<resources>
+
+    <!-- Material theme (day/night vesion) for activities. -->
+    <style name="Theme.Material.DayNight" parent="Theme.Material.Light" />
+
+    <!-- Variant of Material.DayNight that has a solid (opaque) action bar
+         with an inverse color profile. The dark action bar sharply stands out against
+         the light content (when applicable).  -->
+    <style name="Theme.Material.DayNight.DarkActionBar" parent="Theme.Material.Light.DarkActionBar" />
+
+    <!-- Variant of Material.DayNight with no action bar.  -->
+    <style name="Theme.Material.DayNight.NoActionBar" parent="Theme.Material.Light.NoActionBar" />
+
+    <!-- Variant of Material.DayNight that has no title bar and fills
+         the entire screen. This theme
+         sets {@link android.R.attr#windowFullscreen} to true.  -->
+    <style name="Theme.Material.DayNight.NoActionBar.Fullscreen" parent="Theme.Material.Light.NoActionBar.Fullscreen" />
+
+    <!-- Variant of Material.DayNight that has no title bar and fills
+         the entire screen and extends into the display overscan region. This theme
+         sets {@link android.R.attr#windowFullscreen} and {@link android.R.attr#windowOverscan}
+         to true. -->
+    <style name="Theme.Material.DayNight.NoActionBar.Overscan" parent="Theme.Material.Light.NoActionBar.Overscan" />
+
+    <!-- Variant of Material.DayNight that has no title bar and translucent
+         system decor. This theme sets {@link android.R.attr#windowTranslucentStatus} and
+         {@link android.R.attr#windowTranslucentNavigation} to true. -->
+    <style name="Theme.Material.DayNight.NoActionBar.TranslucentDecor" parent="Theme.Material.Light.NoActionBar.TranslucentDecor" />
+
+    <!-- Default Material.DayNight theme for panel windows. This removes all extraneous
+         window decorations, so you basically have an empty rectangle in which
+         to place your content. It makes the window floating, with a transparent
+         background, and turns off dimming behind the window. -->
+    <style name="Theme.Material.DayNight.Panel" parent="Theme.Material.Light.Panel" />
+
+    <!-- Material theme (day/night vesion) for dialog windows and activities,
+         which is used by the {@link android.app.Dialog} class. This changes
+         the window to be floating (not fill the entire screen), and puts a
+         frame around its contents. You can set this theme on an activity if
+         you would like to make an activity that looks like a Dialog. -->
+    <style name="Theme.Material.DayNight.Dialog" parent="Theme.Material.DayNight.BaseDialog" />
+    <style name="Theme.Material.DayNight.BaseDialog" parent="Theme.Material.Light.BaseDialog" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog that has a nice minimum width for
+         a regular dialog. -->
+    <style name="Theme.Material.DayNight.Dialog.MinWidth" parent="Theme.Material.Light.Dialog.MinWidth" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog that does not include a title bar. -->
+    <style name="Theme.Material.DayNight.Dialog.NoActionBar" parent="Theme.Material.Light.Dialog.NoActionBar" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog.NoActionBar that has a nice minimum width for
+         a regular dialog. -->
+    <style name="Theme.Material.DayNight.Dialog.NoActionBar.MinWidth" parent="Theme.Material.Light.Dialog.NoActionBar.MinWidth" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog that has a fixed size. -->
+    <style name="Theme.Material.DayNight.Dialog.FixedSize" parent="Theme.Material.Light.Dialog.FixedSize" />
+
+    <!-- Variant of Theme.Material.DayNight.Dialog.NoActionBar that has a fixed size. -->
+    <style name="Theme.Material.DayNight.Dialog.NoActionBar.FixedSize" parent="Theme.Material.Light.Dialog.NoActionBar.FixedSize" />
+
+    <!-- Theme for a window that will be displayed either full-screen on
+         smaller screens (small, normal) or as a dialog on larger screens
+         (large, xlarge). -->
+    <style name="Theme.Material.DayNight.DialogWhenLarge" parent="Theme.Material.Light.DialogWhenLarge" />
+
+    <!-- Theme for a window without an action bar that will be displayed either full-screen
+         on smaller screens (small, normal) or as a dialog on larger screens
+         (large, xlarge). -->
+    <style name="Theme.Material.DayNight.DialogWhenLarge.NoActionBar" parent="Theme.Material.Light.DialogWhenLarge.NoActionBar" />
+
+    <!-- Theme for a presentation window on a secondary display. -->
+    <style name="Theme.Material.DayNight.Dialog.Presentation" parent="Theme.Material.Light.Dialog.Presentation" />
+
+    <!-- Material user theme for alert dialog windows, which is used by the
+         {@link android.app.AlertDialog} class. -->
+    <style name="Theme.Material.DayNight.Dialog.Alert" parent="Theme.Material.DayNight.Dialog.BaseAlert" />
+    <style name="Theme.Material.DayNight.Dialog.BaseAlert" parent="Theme.Material.Light.Dialog.BaseAlert" />
+
+    <style name="Theme.Material.DayNight.SearchBar" parent="Theme.Material.Light.SearchBar" />
+    <style name="Theme.Material.DayNight.CompactMenu" parent="Theme.Material.Light.CompactMenu" />
+
+</resources>
diff --git a/services/core/java/com/android/server/UiModeManagerService.java b/services/core/java/com/android/server/UiModeManagerService.java
index d1b45694eb1ad..aeacd45422bcb 100644
--- a/services/core/java/com/android/server/UiModeManagerService.java
+++ b/services/core/java/com/android/server/UiModeManagerService.java
@@ -31,6 +31,7 @@ import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
+import android.content.res.Resources;
 import android.os.BatteryManager;
 import android.os.Binder;
 import android.os.Handler;
@@ -63,7 +64,7 @@ final class UiModeManagerService extends SystemService {
     private int mDockState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
 
     private int mLastBroadcastState = Intent.EXTRA_DOCK_STATE_UNDOCKED;
-    int mNightMode = UiModeManager.MODE_NIGHT_NO;
+    private int mNightMode = UiModeManager.MODE_NIGHT_NO;
 
     private boolean mCarModeEnabled = false;
     private boolean mCharging = false;
@@ -157,6 +158,7 @@ final class UiModeManagerService extends SystemService {
     public void onStart() {
         final Context context = getContext();
         mTwilightManager = getLocalService(TwilightManager.class);
+
         final PowerManager powerManager =
                 (PowerManager) context.getSystemService(Context.POWER_SERVICE);
         mWakeLock = powerManager.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
@@ -168,20 +170,23 @@ final class UiModeManagerService extends SystemService {
 
         mConfiguration.setToDefaults();
 
-        mDefaultUiModeType = context.getResources().getInteger(
+        final Resources res = context.getResources();
+        mDefaultUiModeType = res.getInteger(
                 com.android.internal.R.integer.config_defaultUiModeType);
-        mCarModeKeepsScreenOn = (context.getResources().getInteger(
+        mCarModeKeepsScreenOn = (res.getInteger(
                 com.android.internal.R.integer.config_carDockKeepsScreenOn) == 1);
-        mDeskModeKeepsScreenOn = (context.getResources().getInteger(
+        mDeskModeKeepsScreenOn = (res.getInteger(
                 com.android.internal.R.integer.config_deskDockKeepsScreenOn) == 1);
-        mTelevision = context.getPackageManager().hasSystemFeature(
-                PackageManager.FEATURE_TELEVISION) ||
-            context.getPackageManager().hasSystemFeature(
-                    PackageManager.FEATURE_LEANBACK);
-        mWatch = context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH);
 
+        final PackageManager pm = context.getPackageManager();
+        mTelevision = pm.hasSystemFeature(PackageManager.FEATURE_TELEVISION)
+                || pm.hasSystemFeature(PackageManager.FEATURE_LEANBACK);
+        mWatch = pm.hasSystemFeature(PackageManager.FEATURE_WATCH);
+
+        final int defaultNightMode = res.getInteger(
+                com.android.internal.R.integer.config_defaultNightMode);
         mNightMode = Settings.Secure.getInt(context.getContentResolver(),
-                Settings.Secure.UI_NIGHT_MODE, UiModeManager.MODE_NIGHT_AUTO);
+                Settings.Secure.UI_NIGHT_MODE, defaultNightMode);
 
         mTwilightManager.registerListener(mTwilightListener, mHandler);
 
@@ -245,7 +250,7 @@ final class UiModeManagerService extends SystemService {
             final long ident = Binder.clearCallingIdentity();
             try {
                 synchronized (mLock) {
-                    if (isDoingNightModeLocked() && mNightMode != mode) {
+                    if (mNightMode != mode) {
                         Settings.Secure.putInt(getContext().getContentResolver(),
                                 Settings.Secure.UI_NIGHT_MODE, mode);
                         mNightMode = mode;
@@ -309,10 +314,6 @@ final class UiModeManagerService extends SystemService {
         }
     }
 
-    boolean isDoingNightModeLocked() {
-        return mCarModeEnabled || mDockState != Intent.EXTRA_DOCK_STATE_UNDOCKED;
-    }
-
     void setCarModeLocked(boolean enabled, int flags) {
         if (mCarModeEnabled != enabled) {
             mCarModeEnabled = enabled;
@@ -354,17 +355,13 @@ final class UiModeManagerService extends SystemService {
         } else if (isDeskDockState(mDockState)) {
             uiMode = Configuration.UI_MODE_TYPE_DESK;
         }
-        if (mCarModeEnabled) {
-            if (mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
-                updateComputedNightModeLocked();
-                uiMode |= mComputedNightMode ? Configuration.UI_MODE_NIGHT_YES
-                        : Configuration.UI_MODE_NIGHT_NO;
-            } else {
-                uiMode |= mNightMode << 4;
-            }
+
+        if (mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
+            updateComputedNightModeLocked();
+            uiMode |= mComputedNightMode ? Configuration.UI_MODE_NIGHT_YES
+                    : Configuration.UI_MODE_NIGHT_NO;
         } else {
-            // Disabling the car mode clears the night mode.
-            uiMode = (uiMode & ~Configuration.UI_MODE_NIGHT_MASK) | Configuration.UI_MODE_NIGHT_NO;
+            uiMode |= mNightMode << 4;
         }
 
         if (LOG) {
@@ -618,7 +615,7 @@ final class UiModeManagerService extends SystemService {
 
     void updateTwilight() {
         synchronized (mLock) {
-            if (isDoingNightModeLocked() && mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
+            if (mNightMode == UiModeManager.MODE_NIGHT_AUTO) {
                 updateComputedNightModeLocked();
                 updateLocked(0, 0);
             }