diff --git a/api/current.xml b/api/current.xml
index 6174bff..3c6eb9b 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -43786,6 +43786,39 @@
  visibility="public"
 >
 </field>
+<field name="NAVIGATIONHIDDEN_NO"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="1"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="NAVIGATIONHIDDEN_UNDEFINED"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="0"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
+<field name="NAVIGATIONHIDDEN_YES"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="2"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="NAVIGATION_DPAD"
  type="int"
  transient="false"
@@ -44108,6 +44141,16 @@
  visibility="public"
 >
 </field>
+<field name="navigationHidden"
+ type="int"
+ transient="false"
+ volatile="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="orientation"
  type="int"
  transient="false"
@@ -159360,6 +159403,17 @@
  visibility="public"
 >
 </field>
+<field name="FLAG_TURN_SCREEN_ON"
+ type="int"
+ transient="false"
+ volatile="false"
+ value="2097152"
+ static="true"
+ final="true"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</field>
 <field name="FLAG_WATCH_OUTSIDE_TOUCH"
  type="int"
  transient="false"
diff --git a/core/java/android/content/pm/ActivityInfo.java b/core/java/android/content/pm/ActivityInfo.java
index 27783ef..1ad13c5 100644
--- a/core/java/android/content/pm/ActivityInfo.java
+++ b/core/java/android/content/pm/ActivityInfo.java
@@ -217,7 +217,9 @@
     public static final int CONFIG_KEYBOARD = 0x0010;
     /**
      * Bit in {@link #configChanges} that indicates that the activity
-     * can itself handle changes to the keyboard being hidden/exposed. 
+     * can itself handle changes to the keyboard or navigation being hidden/exposed.
+     * Note that inspite of the name, this applies to the changes to any
+     * hidden states: keyboard or navigation.
      * Set from the {@link android.R.attr#configChanges} attribute.
      */
     public static final int CONFIG_KEYBOARD_HIDDEN = 0x0020;
diff --git a/core/java/android/content/res/Configuration.java b/core/java/android/content/res/Configuration.java
index cbf8410..1fe34b5 100644
--- a/core/java/android/content/res/Configuration.java
+++ b/core/java/android/content/res/Configuration.java
@@ -138,6 +138,18 @@
      */
     public int navigation;
     
+    public static final int NAVIGATIONHIDDEN_UNDEFINED = 0;
+    public static final int NAVIGATIONHIDDEN_NO = 1;
+    public static final int NAVIGATIONHIDDEN_YES = 2;
+    
+    /**
+     * A flag indicating whether any 5-way or DPAD navigation available.
+     * This will be set on a device with a mechanism to hide the navigation
+     * controls from the user, when that mechanism is closed.  One of:
+     * {@link #NAVIGATIONHIDDEN_NO}, {@link #NAVIGATIONHIDDEN_YES}.
+     */
+    public int navigationHidden;
+    
     public static final int ORIENTATION_UNDEFINED = 0;
     public static final int ORIENTATION_PORTRAIT = 1;
     public static final int ORIENTATION_LANDSCAPE = 2;
@@ -174,6 +186,7 @@
         keyboardHidden = o.keyboardHidden;
         hardKeyboardHidden = o.hardKeyboardHidden;
         navigation = o.navigation;
+        navigationHidden = o.navigationHidden;
         orientation = o.orientation;
         screenLayout = o.screenLayout;
     }
@@ -198,6 +211,8 @@
         sb.append(hardKeyboardHidden);
         sb.append(" nav=");
         sb.append(navigation);
+        sb.append("/");
+        sb.append(navigationHidden);
         sb.append(" orien=");
         sb.append(orientation);
         sb.append(" layout=");
@@ -219,6 +234,7 @@
         keyboardHidden = KEYBOARDHIDDEN_UNDEFINED;
         hardKeyboardHidden = HARDKEYBOARDHIDDEN_UNDEFINED;
         navigation = NAVIGATION_UNDEFINED;
+        navigationHidden = NAVIGATIONHIDDEN_UNDEFINED;
         orientation = ORIENTATION_UNDEFINED;
         screenLayout = SCREENLAYOUT_SIZE_UNDEFINED;
     }
@@ -286,6 +302,11 @@
             changed |= ActivityInfo.CONFIG_NAVIGATION;
             navigation = delta.navigation;
         }
+        if (delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED
+                && navigationHidden != delta.navigationHidden) {
+            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
+            navigationHidden = delta.navigationHidden;
+        }
         if (delta.orientation != ORIENTATION_UNDEFINED
                 && orientation != delta.orientation) {
             changed |= ActivityInfo.CONFIG_ORIENTATION;
@@ -360,6 +381,10 @@
                 && navigation != delta.navigation) {
             changed |= ActivityInfo.CONFIG_NAVIGATION;
         }
+        if (delta.navigationHidden != NAVIGATIONHIDDEN_UNDEFINED
+                && navigationHidden != delta.navigationHidden) {
+            changed |= ActivityInfo.CONFIG_KEYBOARD_HIDDEN;
+        }
         if (delta.orientation != ORIENTATION_UNDEFINED
                 && orientation != delta.orientation) {
             changed |= ActivityInfo.CONFIG_ORIENTATION;
@@ -416,6 +441,7 @@
         dest.writeInt(keyboardHidden);
         dest.writeInt(hardKeyboardHidden);
         dest.writeInt(navigation);
+        dest.writeInt(navigationHidden);
         dest.writeInt(orientation);
         dest.writeInt(screenLayout);
     }
@@ -448,6 +474,7 @@
         keyboardHidden = source.readInt();
         hardKeyboardHidden = source.readInt();
         navigation = source.readInt();
+        navigationHidden = source.readInt();
         orientation = source.readInt();
         screenLayout = source.readInt();
     }
@@ -478,6 +505,8 @@
         if (n != 0) return n;
         n = this.navigation - that.navigation;
         if (n != 0) return n;
+        n = this.navigationHidden - that.navigationHidden;
+        if (n != 0) return n;
         n = this.orientation - that.orientation;
         if (n != 0) return n;
         n = this.screenLayout - that.screenLayout;
@@ -503,6 +532,7 @@
         return ((int)this.fontScale) + this.mcc + this.mnc
                 + this.locale.hashCode() + this.touchscreen
                 + this.keyboard + this.keyboardHidden + this.hardKeyboardHidden
-                + this.navigation + this.orientation + this.screenLayout;
+                + this.navigation + this.navigationHidden
+                + this.orientation + this.screenLayout;
     }
 }
diff --git a/core/java/android/view/WindowManager.java b/core/java/android/view/WindowManager.java
index 8c12656..f67c4aa 100644
--- a/core/java/android/view/WindowManager.java
+++ b/core/java/android/view/WindowManager.java
@@ -500,6 +500,12 @@
          */
         public static final int FLAG_SHOW_WALLPAPER = 0x00100000;
         
+        /** Window flag: when set as a window is being added or made
+         * visible, once the window has been shown then the system will
+         * poke the power manager's user activity (as if the user had woken
+         * up the device) to turn the screen on. */
+        public static final int FLAG_TURN_SCREEN_ON = 0x00200000;
+        
         /** Window flag: special flag to limit the size of the window to be
          * original size ([320x480] x density). Used to create window for applications
          * running under compatibility mode.
diff --git a/core/res/res/values/attrs_manifest.xml b/core/res/res/values/attrs_manifest.xml
index 7aaf218..365363a 100644
--- a/core/res/res/values/attrs_manifest.xml
+++ b/core/res/res/values/attrs_manifest.xml
@@ -504,8 +504,10 @@
         <!-- The keyboard type has changed, for example the user has plugged
              in an external keyboard. -->
         <flag name="keyboard" value="0x0010" />
-        <!-- The keyboard accessibility has changed, for example the user has
-             slid the keyboard out to expose it. -->
+        <!-- The keyboard or navigation accessibility has changed, for example
+             the user has slid the keyboard out to expose it.  Note that
+             inspite of its name, this applied to any accessibility: keyboard
+             or navigation. -->
         <flag name="keyboardHidden" value="0x0020" />
         <!-- The navigation type has changed.  Should never normally happen. -->
         <flag name="navigation" value="0x0040" />
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 117e139..b84a0d9 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -35,6 +35,9 @@
     <!-- The duration (in milliseconds) of a long animation. -->
     <integer name="config_longAnimTime">300</integer>
 
+    <!-- XXXXX NOTE THE FOLLOWING RESOURCES USE THE WRONG NAMING CONVENTION.
+         Please don't copy them, copy anything else. -->
+         
     <!-- This string array should be overridden by the device to present a list of network attributes.  This is used by the connectivity manager to decide which networks can coexist based on the hardward -->
     <!-- An Array of "[type-name],[associated radio-name],[priority]  -->
     <string-array translatable="false" name="networkAttributes">
@@ -53,6 +56,16 @@
         <item>"wifi,1,1"</item>
         <item>"mobile,0,1"</item>
     </string-array>
+    
+    <!-- Flag indicating whether the keyguard should be bypassed when
+         the slider is open.  This can be set or unset depending how easily
+         the slider can be opened (for example, in a pocket or purse). -->
+    <bool name="config_bypass_keyguard_if_slider_open">true</bool>
+    
+    <!-- Flag indicating whether the device supports automatic brightness mode. -->
+    <bool name="config_automatic_brightness_available">false</bool>
+    
+    <!-- XXXXXX END OF RESOURCES USING WRONG NAMING CONVENTION -->
 
     <!-- The number of degrees to rotate the display when the keyboard is open. -->
     <integer name="config_lidOpenRotation">90</integer>
@@ -60,11 +73,18 @@
     <!-- The number of degrees to rotate the display when the device is in a dock. -->
     <integer name="config_dockedRotation">90</integer>
 
-    <!-- Flag indicating whether the keyguard should be bypassed when
-         the slider is open.  This can be set or unset depending how easily
-         the slider can be opened (for example, in a pocket or purse). -->
-    <bool name="config_bypass_keyguard_if_slider_open">true</bool>
-    
+    <!-- Indicate whether the lid state impacts the accessibility of
+         the physical keyboard.  0 means it doesn't, 1 means it is accessible
+         when the lid is open, 2 means it is accessible when the lid is
+         closed.  The default is 1. -->
+    <integer name="config_lidKeyboardAccessibility">1</integer>
+
+    <!-- Indicate whether the lid state impacts the accessibility of
+         the physical keyboard.  0 means it doesn't, 1 means it is accessible
+         when the lid is open, 2 means it is accessible when the lid is
+         closed.  The default is 0. -->
+    <integer name="config_lidNavigationAccessibility">0</integer>
+
     <!-- Vibrator pattern for feedback about a long screen/key press -->
     <integer-array name="config_longPressVibePattern">
         <item>0</item>
@@ -81,6 +101,4 @@
         <item>30</item>
     </integer-array>
     
-    <!-- Flag indicating whether the device supports automatic brightness mode. -->
-    <bool name="config_automatic_brightness_available">false</bool>
 </resources>
diff --git a/docs/html/guide/topics/resources/resources-i18n.jd b/docs/html/guide/topics/resources/resources-i18n.jd
index 85b89d1..ff9579f 100755
--- a/docs/html/guide/topics/resources/resources-i18n.jd
+++ b/docs/html/guide/topics/resources/resources-i18n.jd
@@ -441,7 +441,7 @@
 <pre>
 MyApp/
     res/
-        drawable-en-rUS-large-long-port-mdpi-finger-keysexposed-qwerty-dpad-480x320/
+        drawable-en-rUS-large-long-port-mdpi-finger-keysexposed-qwerty-navexposed-dpad-480x320/
 </pre>
 
 <p>More typically, you will only specify a few specific configuration options. You may drop any of the values from the
@@ -575,6 +575,14 @@
         <td><code>nokeys</code>, <code>qwerty</code>, <code>12key</code> </td>
     </tr>
     <tr>
+        <td>Whether the navigation keys are available to the user</td>
+        <td><p><code>navexposed</code>, <code>navhidden</code>
+        </p><p>
+          If the hardware's navigation keys are currently available to
+          the user, the navexposed resources will be used; if they are not
+          available (such as behind a closed lid), navhidden will be used.</p></td>
+    </tr>
+    <tr>
         <td>Primary non-touchscreen<br />
             navigation method</td>
         <td><code>nonav</code>, <code>dpad</code>, <code>trackball</code>, <code>wheel</code> </td>
diff --git a/include/utils/ResourceTypes.h b/include/utils/ResourceTypes.h
index e524e2a..17ccad6 100644
--- a/include/utils/ResourceTypes.h
+++ b/include/utils/ResourceTypes.h
@@ -864,6 +864,13 @@
         KEYSHIDDEN_SOFT = 0x0003,
     };
     
+    enum {
+        MASK_NAVHIDDEN = 0x000c,
+        NAVHIDDEN_ANY = 0x0000,
+        NAVHIDDEN_NO = 0x0004,
+        NAVHIDDEN_YES = 0x0008,
+    };
+    
     union {
         struct {
             uint8_t keyboard;
@@ -1011,7 +1018,8 @@
         if (orientation != o.orientation) diffs |= CONFIG_ORIENTATION;
         if (density != o.density) diffs |= CONFIG_DENSITY;
         if (touchscreen != o.touchscreen) diffs |= CONFIG_TOUCHSCREEN;
-        if (((inputFlags^o.inputFlags)&MASK_KEYSHIDDEN) != 0) diffs |= CONFIG_KEYBOARD_HIDDEN;
+        if (((inputFlags^o.inputFlags)&(MASK_KEYSHIDDEN|MASK_NAVHIDDEN)) != 0)
+                diffs |= CONFIG_KEYBOARD_HIDDEN;
         if (keyboard != o.keyboard) diffs |= CONFIG_KEYBOARD;
         if (navigation != o.navigation) diffs |= CONFIG_NAVIGATION;
         if (screenSize != o.screenSize) diffs |= CONFIG_SCREEN_SIZE;
@@ -1082,6 +1090,11 @@
                 if (!(o.inputFlags & MASK_KEYSHIDDEN)) return true;
             }
 
+            if (((inputFlags^o.inputFlags) & MASK_NAVHIDDEN) != 0) {
+                if (!(inputFlags & MASK_NAVHIDDEN)) return false;
+                if (!(o.inputFlags & MASK_NAVHIDDEN)) return true;
+            }
+
             if (keyboard != o.keyboard) {
                 if (!keyboard) return false;
                 if (!o.keyboard) return true;
@@ -1225,6 +1238,18 @@
                     }
                 }
 
+                const int navHidden = inputFlags & MASK_NAVHIDDEN;
+                const int oNavHidden = o.inputFlags & MASK_NAVHIDDEN;
+                if (navHidden != oNavHidden) {
+                    const int reqNavHidden =
+                            requested->inputFlags & MASK_NAVHIDDEN;
+                    if (reqNavHidden) {
+
+                        if (!navHidden) return false;
+                        if (!oNavHidden) return true;
+                    }
+                }
+
                 if ((keyboard != o.keyboard) && requested->keyboard) {
                     return (keyboard);
                 }
@@ -1332,6 +1357,12 @@
                     return false;
                 }
             }
+            const int navHidden = inputFlags&MASK_NAVHIDDEN;
+            const int setNavHidden = settings.inputFlags&MASK_NAVHIDDEN;
+            if (setNavHidden != 0 && navHidden != 0
+                && navHidden != setNavHidden) {
+                return false;
+            }
             if (settings.keyboard != 0 && keyboard != 0
                 && keyboard != settings.keyboard) {
                 return false;
diff --git a/services/java/com/android/server/WindowManagerService.java b/services/java/com/android/server/WindowManagerService.java
index bd2c3ed..60496d6 100644
--- a/services/java/com/android/server/WindowManagerService.java
+++ b/services/java/com/android/server/WindowManagerService.java
@@ -442,6 +442,8 @@
     // Who is holding the screen on.
     Session mHoldingScreenOn;
 
+    boolean mTurnOnScreen;
+    
     /**
      * Whether the UI is currently running in touch mode (not showing
      * navigational focus because the user is directly pressing the screen).
@@ -2208,6 +2210,10 @@
                         && !win.mCommitDrawPending && !mDisplayFrozen) {
                     applyEnterAnimationLocked(win);
                 }
+                if (displayed && (win.mAttrs.flags
+                        & WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON) != 0) {
+                    win.mTurnOnScreen = true;
+                }
                 if ((attrChanges&WindowManager.LayoutParams.FORMAT_CHANGED) != 0) {
                     // To change the format, we need to re-build the surface.
                     win.destroySurfaceLocked();
@@ -6479,6 +6485,7 @@
         int mLastLayer;
         boolean mHaveFrame;
         boolean mObscured;
+        boolean mTurnOnScreen;
 
         WindowState mNextOutsideTouch;
 
@@ -7710,10 +7717,11 @@
                         pw.print(" mDestroying="); pw.print(mDestroying);
                         pw.print(" mRemoved="); pw.println(mRemoved);
             }
-            if (mOrientationChanging || mAppFreezing) {
+            if (mOrientationChanging || mAppFreezing || mTurnOnScreen) {
                 pw.print(prefix); pw.print("mOrientationChanging=");
                         pw.print(mOrientationChanging);
-                        pw.print(" mAppFreezing="); pw.println(mAppFreezing);
+                        pw.print(" mAppFreezing="); pw.print(mAppFreezing);
+                        pw.print(" mTurnOnScreen="); pw.println(mTurnOnScreen);
             }
             if (mHScale != 1 || mVScale != 1) {
                 pw.print(prefix); pw.print("mHScale="); pw.print(mHScale);
@@ -9782,6 +9790,12 @@
             Message m = mH.obtainMessage(H.HOLD_SCREEN_CHANGED, holdScreen);
             mH.sendMessage(m);
         }
+        
+        if (mTurnOnScreen) {
+            mPowerManager.userActivity(SystemClock.uptimeMillis(), false,
+                    LocalPowerManager.BUTTON_EVENT, true);
+            mTurnOnScreen = false;
+        }
     }
 
     void requestAnimationLocked(long delay) {
@@ -9803,6 +9817,10 @@
         try {
             if (win.mSurface != null) {
                 win.mSurface.show();
+                if (win.mTurnOnScreen) {
+                    win.mTurnOnScreen = false;
+                    mTurnOnScreen = true;
+                }
             }
             return true;
         } catch (RuntimeException e) {
diff --git a/tools/aapt/AaptAssets.cpp b/tools/aapt/AaptAssets.cpp
index b00d8b0..b6b0e63 100644
--- a/tools/aapt/AaptAssets.cpp
+++ b/tools/aapt/AaptAssets.cpp
@@ -187,6 +187,13 @@
         return 0;
     }
 
+    // navigation hidden
+    if (getNavHiddenName(part.string(), &config)) {
+        *axis = AXIS_NAVHIDDEN;
+        *value = config.inputFlags;
+        return 0;
+    }
+
     // navigation
     if (getNavigationName(part.string(), &config)) {
         *axis = AXIS_NAVIGATION;
@@ -217,7 +224,7 @@
     Vector<String8> parts;
 
     String8 mcc, mnc, loc, layoutsize, layoutlong, orient, den;
-    String8 touch, key, keysHidden, nav, size, vers;
+    String8 touch, key, keysHidden, nav, navHidden, size, vers;
 
     const char *p = dir;
     const char *q;
@@ -393,6 +400,19 @@
         //printf("not keyboard: %s\n", part.string());
     }
 
+    // navigation hidden
+    if (getNavHiddenName(part.string())) {
+        navHidden = part;
+
+        index++;
+        if (index == N) {
+            goto success;
+        }
+        part = parts[index];
+    } else {
+        //printf("not navHidden: %s\n", part.string());
+    }
+
     if (getNavigationName(part.string())) {
         nav = part;
 
@@ -443,6 +463,7 @@
     this->touchscreen = touch;
     this->keysHidden = keysHidden;
     this->keyboard = key;
+    this->navHidden = navHidden;
     this->navigation = nav;
     this->screenSize = size;
     this->version = vers;
@@ -476,6 +497,8 @@
     s += ",";
     s += keyboard;
     s += ",";
+    s += navHidden;
+    s += ",";
     s += navigation;
     s += ",";
     s += screenSize;
@@ -528,6 +551,10 @@
         s += "-";
         s += keyboard;
     }
+    if (this->navHidden != "") {
+        s += "-";
+        s += navHidden;
+    }
     if (this->navigation != "") {
         s += "-";
         s += navigation;
@@ -852,6 +879,30 @@
     return false;
 }
 
+bool AaptGroupEntry::getNavHiddenName(const char* name,
+                                       ResTable_config* out)
+{
+    uint8_t mask = 0;
+    uint8_t value = 0;
+    if (strcmp(name, kWildcardName) == 0) {
+        mask = out->MASK_NAVHIDDEN;
+        value = out->NAVHIDDEN_ANY;
+    } else if (strcmp(name, "navexposed") == 0) {
+        mask = out->MASK_NAVHIDDEN;
+        value = out->NAVHIDDEN_NO;
+    } else if (strcmp(name, "navhidden") == 0) {
+        mask = out->MASK_NAVHIDDEN;
+        value = out->NAVHIDDEN_YES;
+    }
+
+    if (mask != 0) {
+        if (out) out->inputFlags = (out->inputFlags&~mask) | value;
+        return true;
+    }
+
+    return false;
+}
+
 bool AaptGroupEntry::getNavigationName(const char* name,
                                      ResTable_config* out)
 {
@@ -953,6 +1004,7 @@
     if (v == 0) v = touchscreen.compare(o.touchscreen);
     if (v == 0) v = keysHidden.compare(o.keysHidden);
     if (v == 0) v = keyboard.compare(o.keyboard);
+    if (v == 0) v = navHidden.compare(o.navHidden);
     if (v == 0) v = navigation.compare(o.navigation);
     if (v == 0) v = screenSize.compare(o.screenSize);
     if (v == 0) v = version.compare(o.version);
@@ -973,6 +1025,7 @@
     getTouchscreenName(touchscreen.string(), &params);
     getKeysHiddenName(keysHidden.string(), &params);
     getKeyboardName(keyboard.string(), &params);
+    getNavHiddenName(navHidden.string(), &params);
     getNavigationName(navigation.string(), &params);
     getScreenSizeName(screenSize.string(), &params);
     getVersionName(version.string(), &params);
diff --git a/tools/aapt/AaptAssets.h b/tools/aapt/AaptAssets.h
index 865efd1..26500a3 100644
--- a/tools/aapt/AaptAssets.h
+++ b/tools/aapt/AaptAssets.h
@@ -37,6 +37,7 @@
     AXIS_TOUCHSCREEN,
     AXIS_KEYSHIDDEN,
     AXIS_KEYBOARD,
+    AXIS_NAVHIDDEN,
     AXIS_NAVIGATION,
     AXIS_SCREENSIZE,
     AXIS_VERSION
@@ -64,6 +65,7 @@
     String8 touchscreen;
     String8 keysHidden;
     String8 keyboard;
+    String8 navHidden;
     String8 navigation;
     String8 screenSize;
     String8 version;
@@ -83,6 +85,7 @@
     static bool getKeysHiddenName(const char* name, ResTable_config* out = NULL);
     static bool getKeyboardName(const char* name, ResTable_config* out = NULL);
     static bool getNavigationName(const char* name, ResTable_config* out = NULL);
+    static bool getNavHiddenName(const char* name, ResTable_config* out = NULL);
     static bool getScreenSizeName(const char* name, ResTable_config* out = NULL);
     static bool getVersionName(const char* name, ResTable_config* out = NULL);