diff --git a/core/java/android/util/Spline.java b/core/java/android/util/Spline.java
index ed027eb..41a2e5d 100644
--- a/core/java/android/util/Spline.java
+++ b/core/java/android/util/Spline.java
@@ -20,15 +20,34 @@
  * Performs spline interpolation given a set of control points.
  * @hide
  */
-public final class Spline {
-    private final float[] mX;
-    private final float[] mY;
-    private final float[] mM;
+public abstract class Spline {
 
-    private Spline(float[] x, float[] y, float[] m) {
-        mX = x;
-        mY = y;
-        mM = m;
+    /**
+     * Interpolates the value of Y = f(X) for given X.
+     * Clamps X to the domain of the spline.
+     *
+     * @param x The X value.
+     * @return The interpolated Y = f(X) value.
+     */
+    public abstract float interpolate(float x);
+
+    /**
+     * Creates an appropriate spline based on the properties of the control points.
+     *
+     * If the control points are monotonic then the resulting spline will preserve that and
+     * otherwise optimize for error bounds.
+     */
+    public static Spline createSpline(float[] x, float[] y) {
+        if (!isStrictlyIncreasing(x)) {
+            throw new IllegalArgumentException("The control points must all have strictly "
+                    + "increasing X values.");
+        }
+
+        if (isMonotonic(y)) {
+            return createMonotoneCubicSpline(x, y);
+        } else {
+            return createLinearSpline(x, y);
+        }
     }
 
     /**
@@ -50,107 +69,229 @@
      * @throws IllegalArgumentException if the control points are not monotonic.
      */
     public static Spline createMonotoneCubicSpline(float[] x, float[] y) {
-        if (x == null || y == null || x.length != y.length || x.length < 2) {
-            throw new IllegalArgumentException("There must be at least two control "
-                    + "points and the arrays must be of equal length.");
-        }
-
-        final int n = x.length;
-        float[] d = new float[n - 1]; // could optimize this out
-        float[] m = new float[n];
-
-        // Compute slopes of secant lines between successive points.
-        for (int i = 0; i < n - 1; i++) {
-            float h = x[i + 1] - x[i];
-            if (h <= 0f) {
-                throw new IllegalArgumentException("The control points must all "
-                        + "have strictly increasing X values.");
-            }
-            d[i] = (y[i + 1] - y[i]) / h;
-        }
-
-        // Initialize the tangents as the average of the secants.
-        m[0] = d[0];
-        for (int i = 1; i < n - 1; i++) {
-            m[i] = (d[i - 1] + d[i]) * 0.5f;
-        }
-        m[n - 1] = d[n - 2];
-
-        // Update the tangents to preserve monotonicity.
-        for (int i = 0; i < n - 1; i++) {
-            if (d[i] == 0f) { // successive Y values are equal
-                m[i] = 0f;
-                m[i + 1] = 0f;
-            } else {
-                float a = m[i] / d[i];
-                float b = m[i + 1] / d[i];
-                if (a < 0f || b < 0f) {
-                    throw new IllegalArgumentException("The control points must have "
-                            + "monotonic Y values.");
-                }
-                float h = FloatMath.hypot(a, b);
-                if (h > 9f) {
-                    float t = 3f / h;
-                    m[i] = t * a * d[i];
-                    m[i + 1] = t * b * d[i];
-                }
-            }
-        }
-        return new Spline(x, y, m);
+        return new MonotoneCubicSpline(x, y);
     }
 
     /**
-     * Interpolates the value of Y = f(X) for given X.
-     * Clamps X to the domain of the spline.
+     * Creates a linear spline from a given set of control points.
      *
-     * @param x The X value.
-     * @return The interpolated Y = f(X) value.
+     * Like a monotone cubic spline, the interpolated curve will be monotonic if the control points
+     * are monotonic.
+     *
+     * @param x The X component of the control points, strictly increasing.
+     * @param y The Y component of the control points.
+     * @return
+     *
+     * @throws IllegalArgumentException if the X or Y arrays are null, have
+     * different lengths or have fewer than 2 values.
+     * @throws IllegalArgumentException if the X components of the control points are not strictly
+     * increasing.
      */
-    public float interpolate(float x) {
-        // Handle the boundary cases.
-        final int n = mX.length;
-        if (Float.isNaN(x)) {
-            return x;
-        }
-        if (x <= mX[0]) {
-            return mY[0];
-        }
-        if (x >= mX[n - 1]) {
-            return mY[n - 1];
-        }
-
-        // Find the index 'i' of the last point with smaller X.
-        // We know this will be within the spline due to the boundary tests.
-        int i = 0;
-        while (x >= mX[i + 1]) {
-            i += 1;
-            if (x == mX[i]) {
-                return mY[i];
-            }
-        }
-
-        // Perform cubic Hermite spline interpolation.
-        float h = mX[i + 1] - mX[i];
-        float t = (x - mX[i]) / h;
-        return (mY[i] * (1 + 2 * t) + h * mM[i] * t) * (1 - t) * (1 - t)
-                + (mY[i + 1] * (3 - 2 * t) + h * mM[i + 1] * (t - 1)) * t * t;
+    public static Spline createLinearSpline(float[] x, float[] y) {
+        return new LinearSpline(x, y);
     }
 
-    // For debugging.
-    @Override
-    public String toString() {
-        StringBuilder str = new StringBuilder();
-        final int n = mX.length;
-        str.append("[");
-        for (int i = 0; i < n; i++) {
-            if (i != 0) {
-                str.append(", ");
-            }
-            str.append("(").append(mX[i]);
-            str.append(", ").append(mY[i]);
-            str.append(": ").append(mM[i]).append(")");
+    private static boolean isStrictlyIncreasing(float[] x) {
+        if (x == null || x.length < 2) {
+            throw new IllegalArgumentException("There must be at least two control points.");
         }
-        str.append("]");
-        return str.toString();
+        float prev = x[0];
+        for (int i = 1; i < x.length; i++) {
+            float curr = x[i];
+            if (curr <= prev) {
+                return false;
+            }
+            prev = curr;
+        }
+        return true;
+    }
+
+    private static boolean isMonotonic(float[] x) {
+        if (x == null || x.length < 2) {
+            throw new IllegalArgumentException("There must be at least two control points.");
+        }
+        float prev = x[0];
+        for (int i = 1; i < x.length; i++) {
+            float curr = x[i];
+            if (curr < prev) {
+                return false;
+            }
+            prev = curr;
+        }
+        return true;
+    }
+
+    public static class MonotoneCubicSpline extends Spline {
+        private float[] mX;
+        private float[] mY;
+        private float[] mM;
+
+        public MonotoneCubicSpline(float[] x, float[] y) {
+            if (x == null || y == null || x.length != y.length || x.length < 2) {
+                throw new IllegalArgumentException("There must be at least two control "
+                        + "points and the arrays must be of equal length.");
+            }
+
+            final int n = x.length;
+            float[] d = new float[n - 1]; // could optimize this out
+            float[] m = new float[n];
+
+            // Compute slopes of secant lines between successive points.
+            for (int i = 0; i < n - 1; i++) {
+                float h = x[i + 1] - x[i];
+                if (h <= 0f) {
+                    throw new IllegalArgumentException("The control points must all "
+                            + "have strictly increasing X values.");
+                }
+                d[i] = (y[i + 1] - y[i]) / h;
+            }
+
+            // Initialize the tangents as the average of the secants.
+            m[0] = d[0];
+            for (int i = 1; i < n - 1; i++) {
+                m[i] = (d[i - 1] + d[i]) * 0.5f;
+            }
+            m[n - 1] = d[n - 2];
+
+            // Update the tangents to preserve monotonicity.
+            for (int i = 0; i < n - 1; i++) {
+                if (d[i] == 0f) { // successive Y values are equal
+                    m[i] = 0f;
+                    m[i + 1] = 0f;
+                } else {
+                    float a = m[i] / d[i];
+                    float b = m[i + 1] / d[i];
+                    if (a < 0f || b < 0f) {
+                        throw new IllegalArgumentException("The control points must have "
+                                + "monotonic Y values.");
+                    }
+                    float h = FloatMath.hypot(a, b);
+                    if (h > 9f) {
+                        float t = 3f / h;
+                        m[i] = t * a * d[i];
+                        m[i + 1] = t * b * d[i];
+                    }
+                }
+            }
+
+            mX = x;
+            mY = y;
+            mM = m;
+        }
+
+        @Override
+        public float interpolate(float x) {
+            // Handle the boundary cases.
+            final int n = mX.length;
+            if (Float.isNaN(x)) {
+                return x;
+            }
+            if (x <= mX[0]) {
+                return mY[0];
+            }
+            if (x >= mX[n - 1]) {
+                return mY[n - 1];
+            }
+
+            // Find the index 'i' of the last point with smaller X.
+            // We know this will be within the spline due to the boundary tests.
+            int i = 0;
+            while (x >= mX[i + 1]) {
+                i += 1;
+                if (x == mX[i]) {
+                    return mY[i];
+                }
+            }
+
+            // Perform cubic Hermite spline interpolation.
+            float h = mX[i + 1] - mX[i];
+            float t = (x - mX[i]) / h;
+            return (mY[i] * (1 + 2 * t) + h * mM[i] * t) * (1 - t) * (1 - t)
+                    + (mY[i + 1] * (3 - 2 * t) + h * mM[i + 1] * (t - 1)) * t * t;
+        }
+
+        // For debugging.
+        @Override
+        public String toString() {
+            StringBuilder str = new StringBuilder();
+            final int n = mX.length;
+            str.append("MonotoneCubicSpline{[");
+            for (int i = 0; i < n; i++) {
+                if (i != 0) {
+                    str.append(", ");
+                }
+                str.append("(").append(mX[i]);
+                str.append(", ").append(mY[i]);
+                str.append(": ").append(mM[i]).append(")");
+            }
+            str.append("]}");
+            return str.toString();
+        }
+    }
+
+    public static class LinearSpline extends Spline {
+        private final float[] mX;
+        private final float[] mY;
+        private final float[] mM;
+
+        public LinearSpline(float[] x, float[] y) {
+            if (x == null || y == null || x.length != y.length || x.length < 2) {
+                throw new IllegalArgumentException("There must be at least two control "
+                        + "points and the arrays must be of equal length.");
+            }
+            final int N = x.length;
+            mM = new float[N-1];
+            for (int i = 0; i < N-1; i++) {
+                mM[i] = (y[i+1] - y[i]) / (x[i+1] - x[i]);
+            }
+            mX = x;
+            mY = y;
+        }
+
+        @Override
+        public float interpolate(float x) {
+            // Handle the boundary cases.
+            final int n = mX.length;
+            if (Float.isNaN(x)) {
+                return x;
+            }
+            if (x <= mX[0]) {
+                return mY[0];
+            }
+            if (x >= mX[n - 1]) {
+                return mY[n - 1];
+            }
+
+            // Find the index 'i' of the last point with smaller X.
+            // We know this will be within the spline due to the boundary tests.
+            int i = 0;
+            while (x >= mX[i + 1]) {
+                i += 1;
+                if (x == mX[i]) {
+                    return mY[i];
+                }
+            }
+            return mY[i] + mM[i] * (x - mX[i]);
+        }
+
+        @Override
+        public String toString() {
+            StringBuilder str = new StringBuilder();
+            final int n = mX.length;
+            str.append("LinearSpline{[");
+            for (int i = 0; i < n; i++) {
+                if (i != 0) {
+                    str.append(", ");
+                }
+                str.append("(").append(mX[i]);
+                str.append(", ").append(mY[i]);
+                if (i < n-1) {
+                    str.append(": ").append(mM[i]);
+                }
+                str.append(")");
+            }
+            str.append("]}");
+            return str.toString();
+        }
     }
 }
diff --git a/docs/html/_redirects.yaml b/docs/html/_redirects.yaml
index 45e2fed..1e32d43 100644
--- a/docs/html/_redirects.yaml
+++ b/docs/html/_redirects.yaml
@@ -1,3 +1,10 @@
+# WARNING: THIS FILE IS NOT USED IN PRODUCTION
+# CHANGES MADE HERE **DO NOT EFFECT** developer.android.com
+
+# Instead, update the following file in the current docs release branch:
+# <docs-release-branch>/vendor/google/docs/app-engine-server/v3/redirects.yaml
+
+#=============================================================================
 # Redirects file.
 # This file contains the list of rewrite rules that are applied when serving
 # pages. Add "pattern: True" to use python regex in to or from.
diff --git a/docs/html/design/style/iconography.jd b/docs/html/design/style/iconography.jd
index 4559f00..ec7638d 100644
--- a/docs/html/design/style/iconography.jd
+++ b/docs/html/design/style/iconography.jd
@@ -29,7 +29,7 @@
 scaling ratio</strong> between the five primary densities (medium, high, x-high, xx-high, and
 xxx-high respectively). For example, consider that the size for a launcher icon is specified to be
 48x48 dp. This means the baseline (MDPI) asset is 48x48 px, and the
-high density (HDPI) asset should be 1.5x the baseline at 72x72 px, and the x-high
+high-density(HDPI) asset should be 1.5x the baseline at 72x72 px, and the x-high
 density (XHDPI) asset should be 2x the baseline at 96x96 px, and so on.</p>
 
 <p class="note"><strong>Note:</strong> Android also supports low-density (LDPI) screens,
@@ -489,11 +489,12 @@
     xhdpi/...
         _pre_production/...
             <em>working_file</em>.psd
-        <em>finished_asset</em>.png</pre>
+        <em>finished_asset</em>.png
     xxhdpi/...
         _pre_production/...
             <em>working_file</em>.psd
-        <em>finished_asset</em>.png</pre>
+        <em>finished_asset</em>.png
+</pre>
 
 <p>Because the structure in your working space is similar to that of the application, you
 can quickly determine which assets should be copied to each
@@ -513,6 +514,8 @@
         <em>finished_asset</em>.png
     drawable-xhdpi/...
         <em>finished_asset</em>.png
+    drawable-xxhdpi/...
+        <em>finished_asset</em>.png
 </pre>
 
 <p>For more information about how to save resources in the application project,
@@ -520,6 +523,21 @@
 </p>
 
 
+<h3 id="xxxhdpi-launcher">Provide an xxx-high-density launcher icon</h3>
+
+<p>Some devices scale-up the launcher icon by as much as 25%. For example, if your highest density 
+launcher icon image is already extra-extra-high density, the scaling process will make it appear
+less crisp. So you should provide a higher density launcher icon in the <code>drawable-xxxhdpi
+</code> directory, which the system uses instead of scaling up a smaller version of the icon.</p>
+
+<p class="note"><strong>Note:</strong> the <code>drawable-xxxhdpi</code> qualifier is necessary only
+to provide a launcher icon that can appear larger than usual on an xxhdpi device. You do not need to
+provide xxxhdpi assets for all your app's images.</p>
+
+<p>See <a href="{@docRoot}guide/practices/screens_support.html">Supporting Multiple Screens</a> for
+more information.</p>
+
+
 <h3>Remove unnecessary metadata from final assets</h3>
 
 <p>Although the Android SDK tools will automatically compress PNGs when packaging
diff --git a/docs/html/google/play-services/setup.jd b/docs/html/google/play-services/setup.jd
index ebd3694..d7e449b 100644
--- a/docs/html/google/play-services/setup.jd
+++ b/docs/html/google/play-services/setup.jd
@@ -66,8 +66,8 @@
 ...
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:+'
-    <strong>compile 'com.google.android.gms:play-services:5.0.77'</strong>
+    compile 'com.android.support:appcompat-v7:20.+'
+    <strong>compile 'com.google.android.gms:play-services:5.+'</strong>
 }
 </pre>
 <p>Be sure you update this version number each time Google Play services is updated.</p>
diff --git a/docs/html/guide/practices/screens_support.jd b/docs/html/guide/practices/screens_support.jd
index dbe6c1a..7ebda53 100644
--- a/docs/html/guide/practices/screens_support.jd
+++ b/docs/html/guide/practices/screens_support.jd
@@ -111,15 +111,15 @@
   <dd>Actual physical size, measured as the screen's diagonal.
 
   <p>For simplicity, Android groups all actual screen sizes into four generalized sizes: small,
-normal, large, and extra large.</p></dd>
+normal, large, and extra-large.</p></dd>
 
 <dt><em>Screen density</em></dt>
   <dd>The quantity of pixels within a physical area of the screen; usually referred to as dpi (dots
 per inch). For example, a "low" density screen has fewer pixels within a given physical area,
 compared to a "normal" or "high" density screen.</p>
 
-  <p>For simplicity, Android groups all actual screen densities into four generalized densities:
-low, medium, high, and extra high.</p></dd>
+  <p>For simplicity, Android groups all actual screen densities into six generalized densities:
+low, medium, high, extra-high, extra-extra-high, and extra-extra-extra-high.</p></dd>
 
 <dt><em>Orientation</em></dt>
   <dd>The orientation of the screen from the user's point of view. This is either landscape or
@@ -168,9 +168,15 @@
 href="#DeclaringTabletLayouts">Declaring Tablet Layouts for Android 3.2</a> for more
 information.</p>
 </li>
-<li>A set of four generalized <strong>densities</strong>: <em>ldpi</em> (low), <em>mdpi</em>
-(medium),
-<em>hdpi</em> (high), and <em>xhdpi</em> (extra high)
+<li>A set of six generalized <strong>densities</strong>:
+  <ul>
+    <li><em>ldpi</em> (low) ~120dpi</li>
+    <li><em>mdpi</em> (medium) ~160dpi</li>
+    <li><em>hdpi</em> (high) ~240dpi</li>
+    <li><em>xhdpi</em> (extra-high) ~320dpi</li>
+    <li><em>xxhdpi</em> (extra-extra-high) ~480dpi</li>
+    <li><em>xxxhdpi</em> (extra-extra-extra-high) ~640dpi</li>
+  </ul>
 </li>
 </ul>
 
@@ -243,14 +249,14 @@
 densities.</p>
 
 <p>Maintaining density independence is important because, without it, a UI element (such as a
-button) appears physically larger on a low density screen and smaller on a high density screen. Such
+button) appears physically larger on a low-density screen and smaller on a high-density screen. Such
 density-related size changes can cause problems in your application layout and usability. Figures 2
 and 3 show the difference between an application when it does not provide density independence and
 when it does, respectively.</p>
 
 <img src="{@docRoot}images/screens_support/density-test-bad.png" alt=""  />
 <p class="img-caption"><strong>Figure 2.</strong> Example application without support for
-different densities, as shown on low, medium, and high density screens.</p>
+different densities, as shown on low, medium, and high-density screens.</p>
 
 <img src="{@docRoot}images/screens_support/density-test-good.png" alt="" />
 <p class="img-caption"><strong>Figure 3.</strong> Example application with good support for
@@ -266,8 +272,8 @@
 </ul>
 
 <p>In figure 2, the text view and bitmap drawable have dimensions specified in pixels ({@code px}
-units), so the views are physically larger on a low density screen and smaller on a high density
-screen. This is because although the actual screen sizes may be the same, the high density screen
+units), so the views are physically larger on a low-density screen and smaller on a high-density
+screen. This is because although the actual screen sizes may be the same, the high-density screen
 has more pixels per inch (the same amount of pixels fit in a smaller area). In figure 3, the layout
 dimensions are specified in density-independent pixels ({@code dp} units). Because the baseline for
 density-independent pixels is a medium-density screen, the device with a medium-density screen looks
@@ -311,7 +317,7 @@
 <a href="{@docRoot}guide/topics/manifest/supports-screens-element.html">{@code
 &lt;supports-screens&gt;}</a> element in your manifest file.</p>
   </li>
-  
+
   <li><strong>Provide different layouts for different screen sizes</strong>
     <p>By default, Android resizes your application layout to fit the current device screen. In most
 cases, this works fine. In other cases, your UI might not look as good and might need adjustments
@@ -320,7 +326,7 @@
 you might need to adjust sizes so that everything can fit on the screen.</p>
     <p>The configuration qualifiers you can use to provide size-specific resources are
 <code>small</code>, <code>normal</code>, <code>large</code>, and <code>xlarge</code>. For
-example, layouts for an extra large screen should go in {@code layout-xlarge/}.</p>
+example, layouts for an extra-large screen should go in {@code layout-xlarge/}.</p>
     <p>Beginning with Android 3.2 (API level 13), the above size groups are deprecated and you
 should instead use the {@code sw&lt;N&gt;dp} configuration qualifier to define the smallest
 available width required by your layout resources. For example, if your multi-pane tablet layout
@@ -328,7 +334,7 @@
 new techniques for declaring layout resources is discussed further in the section about <a
 href="#DeclaringTabletLayouts">Declaring Tablet Layouts for Android 3.2</a>.</p>
   </li>
-  
+
   <li><strong>Provide different bitmap drawables for different screen densities</strong>
     <p>By default, Android scales your bitmap drawables ({@code .png}, {@code .jpg}, and {@code
 .gif} files) and Nine-Patch drawables ({@code .9.png} files) so that they render at the appropriate
@@ -337,10 +343,22 @@
 screen, and scales them down when on a low-density screen. This scaling can cause artifacts in the
 bitmaps. To ensure your bitmaps look their best, you should include alternative versions at
 different resolutions for different screen densities.</p>
-    <p>The configuration qualifiers you can use for density-specific resources are
-<code>ldpi</code> (low), <code>mdpi</code> (medium), <code>hdpi</code> (high), and
-<code>xhdpi</code> (extra high). For example, bitmaps for high-density screens should go in
-{@code drawable-hdpi/}.</p>
+    <p>The <a href="#qualifiers">configuration qualifiers</a> (described in detail below) that you
+can use for density-specific resources are <code>ldpi</code> (low), <code>mdpi</code> (medium),
+<code>hdpi</code> (high), <code>xhdpi</code> extra-high), <code>xxhdpi</code>
+(extra-extra-high), and <code>xxxhdpi</code> (extra-extra-extra-high). For example, bitmaps
+for high-density screens should go in {@code drawable-hdpi/}.</p>
+    <p class="note" id="xxxhdpi-note"><strong>Note:</strong>  the <code>drawable-xxxhdpi</code>
+qualifier is necessary only to provide a launcher icon that can appear larger than usual on an
+xxhdpi device. You do not need to provide xxxhdpi assets for all your app's images.</p>
+    <p>Some devices scale-up the launcher icon by as much as 25%. For example, if your highest
+density launcher icon image is already extra-extra-high-density, the scaling process will make it
+appear less crisp. So you should provide a higher density launcher icon in the
+<code>drawable-xxxhdpi</code> directory, which the system uses instead of scaling up a smaller
+version of the icon.</p>
+    <p>See <a href="{@docRoot}design/style/iconography.html#xxxhdpi-launcher">Provide an
+xxx-high-density launcher icon</a> for more information. You should not use the
+<code>xxxhdpi</code> qualifier for UI elements other than the launcher icon.</p>
   </li>
 </ul>
 
@@ -371,14 +389,14 @@
   <p>The "default" resources are those that are not tagged with a configuration qualifier. For
 example, the resources in {@code drawable/} are the default drawable resources. The system
 assumes that default resources are designed for the baseline screen size and density, which is a
-normal screen size and a medium density. As such, the system scales default density
+normal screen size and a medium-density. As such, the system scales default density
 resources up for high-density screens and down for low-density screens, as appropriate.</p>
   <p>However, when the system is looking for a density-specific resource and does not find it in
 the density-specific directory, it won't always use the default resources. The system may
 instead use one of the other density-specific resources in order to provide better results
 when scaling. For example, when looking for a low-density resource and it is not available, the
 system prefers to scale-down the high-density version of the resource, because the
-system can easily scale a high-density resource down to low-density by a factor of 0.5, with 
+system can easily scale a high-density resource down to low-density by a factor of 0.5, with
 fewer artifacts, compared to scaling a medium-density resource by a factor of 0.75.</p>
 </li>
 </ol>
@@ -416,9 +434,9 @@
 files must be named exactly the same as the default resource files.</li>
 </ol>
 
-<p>For example, {@code xlarge} is a configuration qualifier for extra large screens. When you append
+<p>For example, {@code xlarge} is a configuration qualifier for extra-large screens. When you append
 this string to a resource directory name (such as {@code layout-xlarge}), it indicates to the
-system that these resources are to be used on devices that have an extra large screen.</p>
+system that these resources are to be used on devices that have an extra-large screen.</p>
 
 <p class="table-caption"><strong>Table 1.</strong> Configuration qualifiers that allow you to
 provide special resources for different screen configurations.</p>
@@ -445,11 +463,11 @@
 </tr>
 <tr>
 <td><code>xlarge</code></td>
-<td>Resources for <em>extra large</em> size screens.</td>
+<td>Resources for <em>extra-large</em> size screens.</td>
 </tr>
 
 <tr>
-<td rowspan="6">Density</td>
+<td rowspan="8">Density</td>
 <td><code>ldpi</code></td>
 <td>Resources for low-density (<em>ldpi</em>) screens (~120dpi).</td>
 </tr>
@@ -464,7 +482,14 @@
 </tr>
 <tr>
 <td><code>xhdpi</code></td>
-<td>Resources for extra high-density (<em>xhdpi</em>) screens (~320dpi).</td>
+<td>Resources for extra-high-density (<em>xhdpi</em>) screens (~320dpi).</td>
+</tr>
+<td><code>xxhdpi</code></td>
+<td>Resources for extra-extra-high-density (<em>xxhdpi</em>) screens (~480dpi).</td>
+</tr>
+<td><code>xxxhdpi</code></td>
+<td>Resources for extra-extra-extra-high-density (<em>xxxhdpi</em>) uses (~640dpi). Use this for the
+  launcher icon only, see <a href="#xxxhdpi-note">note</a> above.</td>
 </tr>
 <tr>
 <td><code>nodpi</code></td>
@@ -515,18 +540,18 @@
 
 <p>For example, the following is a list of resource directories in an application that
 provides different layout designs for different screen sizes and different bitmap drawables
-for medium, high, and extra high density screens.</p>
+for medium, high, and extra-high-density screens.</p>
 
 <pre class="classic">
-res/layout/my_layout.xml             // layout for normal screen size ("default")
-res/layout-small/my_layout.xml       // layout for small screen size
-res/layout-large/my_layout.xml       // layout for large screen size
-res/layout-xlarge/my_layout.xml      // layout for extra large screen size
-res/layout-xlarge-land/my_layout.xml // layout for extra large in landscape orientation
+res/layout/my_layout.xml              // layout for normal screen size ("default")
+res/layout-large/my_layout.xml        // layout for large screen size
+res/layout-xlarge/my_layout.xml       // layout for extra-large screen size
+res/layout-xlarge-land/my_layout.xml  // layout for extra-large in landscape orientation
 
-res/drawable-mdpi/my_icon.png        // bitmap for medium density
-res/drawable-hdpi/my_icon.png        // bitmap for high density
-res/drawable-xhdpi/my_icon.png       // bitmap for extra high density
+res/drawable-mdpi/my_icon.png         // bitmap for medium-density
+res/drawable-hdpi/my_icon.png         // bitmap for high-density
+res/drawable-xhdpi/my_icon.png        // bitmap for extra-high-density
+res/drawable-xxhdpi/my_icon.png       // bitmap for extra-extra-high-density
 </pre>
 
 <p>For more information about how to use alternative resources and a complete list of
@@ -575,10 +600,10 @@
 screen. For example, a row of buttons might not fit within the width of the screen on a small screen
 device. In this case you should provide an alternative layout for small screens that adjusts the
 size or position of the buttons.</li>
-  <li>When testing on an extra large screen, you might realize that your layout doesn't make
+  <li>When testing on an extra-large screen, you might realize that your layout doesn't make
 efficient use of the big screen and is obviously stretched to fill it.
-In this case, you should provide an alternative layout for extra large screens that provides a
-redesigned UI that is optimized for bigger screens such as tablets. 
+In this case, you should provide an alternative layout for extra-large screens that provides a
+redesigned UI that is optimized for bigger screens such as tablets.
     <p>Although your application should work fine without an alternative layout on big screens, it's
 quite important to users that your application looks as though it's designed specifically for their
 devices. If the UI is obviously stretched, users are more likely to be unsatisfied with the
@@ -598,7 +623,7 @@
 <p>If your UI uses bitmaps that need to fit the size of a view even after the system scales
 the layout (such as the background image for a button), you should use <a
 href="{@docRoot}guide/topics/graphics/2d-graphics.html#nine-patch">Nine-Patch</a> bitmap files. A
-Nine-Patch file is basically a PNG file in which you specific two-dimensional regions that are
+Nine-Patch file is basically a PNG file in which you specify two-dimensional regions that are
 stretchable. When the system needs to scale the view in which the bitmap is used, the system
 stretches the Nine-Patch bitmap, but stretches only the specified regions. As such, you don't
 need to provide different drawables for different screen sizes, because the Nine-Patch bitmap can
@@ -621,21 +646,24 @@
 each one, for different densities.</p>
 
 <p class="note"><strong>Note:</strong> You only need to provide density-specific drawables for
-bitmap files ({@code .png}, {@code .jpg}, or {@code .gif}) and Nine-Path files ({@code
+bitmap files ({@code .png}, {@code .jpg}, or {@code .gif}) and Nine-Patch files ({@code
 .9.png}). If you use XML files to define shapes, colors, or other <a
 href="{@docRoot}guide/topics/resources/drawable-resource.html">drawable resources</a>, you should
 put one copy in the default drawable directory ({@code drawable/}).</p>
 
 <p>To create alternative bitmap drawables for different densities, you should follow the
-<b>3:4:6:8 scaling ratio</b> between the four generalized densities. For example, if you have
-a bitmap drawable that's 48x48 pixels for medium-density screen (the size for a launcher icon),
-all the different sizes should be:</p>
+<b>3:4:6:8:12:16 scaling ratio</b> between the six generalized densities. For example, if you have
+a bitmap drawable that's 48x48 pixels for medium-density screens, all the different sizes should be:
+</p>
 
 <ul>
-  <li>36x36 for low-density</li>
-  <li>48x48 for medium-density</li>
-  <li>72x72 for high-density</li>
-  <li>96x96 for extra high-density</li>
+  <li>36x36 (0.75x) for low-density</li>
+  <li>48x48 (1.0x baseline) for medium-density</li>
+  <li>72x72 (1.5x) for high-density</li>
+  <li>96x96 (2.0x) for extra-high-density</li>
+  <li>180x180 (3.0x) for extra-extra-high-density</li>
+  <li>192x192 (4.0x) for extra-extra-extra-high-density (launcher icon only; see
+    <a href="#xxxhdpi-note">note</a> above)</li>
 </ul>
 
 <p>For more information about designing icons, see the <a
@@ -715,7 +743,7 @@
 screen area. Specifically, the device's smallestWidth is the shortest of the screen's available
 height and width (you may also think of it as the "smallest possible width" for the screen). You can
 use this qualifier to ensure that, regardless of the screen's current orientation, your
-application's has at least {@code &lt;N&gt;} dps of width available for it UI.</p>
+application's has at least {@code &lt;N&gt;} dps of width available for its UI.</p>
         <p>For example, if your layout requires that its smallest dimension of screen area be at
 least 600 dp at all times, then you can use this qualifer to create the layout resources, {@code
 res/layout-sw600dp/}. The system will use these resources only when the smallest dimension of
@@ -1011,8 +1039,8 @@
 <p>If you need to control exactly how your application will look on various
 screen configurations, adjust your layouts and bitmap drawables in configuration-specific
 resource directories. For example, consider an icon that you want to display on
-medium and high density screens. Simply create your icon at two different sizes
-(for instance 100x100 for medium density and 150x150 for high density) and put
+medium and high-density screens. Simply create your icon at two different sizes
+(for instance 100x100 for medium-density and 150x150 for high-density) and put
 the two variations in the appropriate directories, using the proper
 qualifiers:</p>
 
@@ -1115,9 +1143,7 @@
 <div class="figure" style="width:300px">
 <img src="{@docRoot}images/screens_support/scale-test.png" alt="" />
 <p class="img-caption"><strong>Figure 5.</strong> Comparison of pre-scaled and auto-scaled
-bitmaps, from <a
-href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/graphics/DensityActivity.html">
-ApiDemos</a>.
+bitmaps.
 </p>
 </div>
 
@@ -1153,10 +1179,7 @@
 (120), medium (160) and high (240) density bitmaps on a high-density screen. The differences are
 subtle, because all of the bitmaps are being scaled to match the current screen density, however the
 scaled bitmaps have slightly different appearances depending on whether they are pre-scaled or
-auto-scaled at draw time. You can find the source code for this sample application, which
-demonstrates using pre-scaled and auto-scaled bitmaps, in <a
-href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/graphics/DensityActivity.html">
-ApiDemos</a>.</p>
+auto-scaled at draw time.</p>
 
 <p class="note"><strong>Note:</strong> In Android 3.0 and above, there should be no perceivable
 difference between pre-scaled and auto-scaled bitmaps, due to improvements in the graphics
@@ -1172,9 +1195,9 @@
 pixels. Imagine an application in which a scroll or fling gesture is recognized after the user's
 finger has moved by at least 16 pixels. On a baseline screen, a user's must move by {@code 16 pixels
 / 160 dpi}, which equals 1/10th of an inch (or 2.5 mm) before the gesture is recognized. On a device
-with a high density display (240dpi), the user's must move by {@code 16 pixels / 240 dpi}, which
+with a high-density display (240dpi), the user's must move by {@code 16 pixels / 240 dpi}, which
 equals 1/15th of an inch (or 1.7 mm). The distance is much shorter and the application thus appears
-more sensitive to the user.</p> 
+more sensitive to the user.</p>
 
 <p>To fix this issue, the gesture threshold must be expressed in code in <code>dp</code> and then
 converted to actual pixels. For example:</p>
@@ -1194,7 +1217,7 @@
 <p>The {@link android.util.DisplayMetrics#density DisplayMetrics.density} field specifies the scale
 factor you must use to convert {@code dp} units to pixels, according to the current screen density.
 On a medium-density screen, {@link android.util.DisplayMetrics#density DisplayMetrics.density}
-equals 1.0; on a high-density screen it equals 1.5; on an extra high-density screen, it equals 2.0;
+equals 1.0; on a high-density screen it equals 1.5; on an extra-high-density screen, it equals 2.0;
 and on a low-density screen, it equals 0.75. This figure is the factor by which you should multiply
 the {@code dp} units on order to get the actual pixel count for the current screen. (Then add {@code
 0.5f} to round the figure up to the nearest whole number, when converting to an integer.) For more
@@ -1277,7 +1300,7 @@
         <nobr>High density (240), <em>hdpi</em><nobr>
       </th>
       <th>
-        <nobr>Extra high density (320), <em>xhdpi</em><nobr>
+        <nobr>Extra-high-density (320), <em>xhdpi</em><nobr>
       </th>
     </tr>
     <tr>
@@ -1315,7 +1338,7 @@
     </tr>
     <tr>
       <th>
-        <em>Extra Large</em> screen
+        <em>Extra-Large</em> screen
       </th>
       <td>1024x600</td>
       <td><strong>WXGA (1280x800)</strong><sup>&dagger;</sup><br>
@@ -1369,4 +1392,4 @@
 
 <p>For more information about creating AVDs from the command line, see <a
 href="{@docRoot}tools/devices/managing-avds-cmdline.html">Managing AVDs from the
-Command Line</a></p>
+Command Line</a>.</p>
\ No newline at end of file
diff --git a/docs/html/guide/topics/admin/device-admin.jd b/docs/html/guide/topics/admin/device-admin.jd
index a474498..2d02e51 100644
--- a/docs/html/guide/topics/admin/device-admin.jd
+++ b/docs/html/guide/topics/admin/device-admin.jd
@@ -28,12 +28,6 @@
       <li>{@link android.app.admin.DevicePolicyManager}</li>
       <li>{@link android.app.admin.DeviceAdminInfo}</li>
     </ol>
-    <h2>Related samples</h2>
-    <ol>
-      <li><a
-href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/app/DeviceAdminSample.html">
-DeviceAdminSample</a></li>
-</ol>
 </div>
 </div>
 
@@ -232,18 +226,12 @@
 
 <h2 id="sample">Sample Application</h2>
 
-<p>The examples used in this document are based on the <a
-href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/app/DeviceAdminSample.html">
-Device Administration API
-sample</a>, which is included in the SDK samples. For information on downloading and
-installing the SDK samples, see <a
-href="{@docRoot}resources/samples/get.html">
-Getting the Samples</a>. Here is the  <a
-href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/app/DeviceAdminSample.html">
-complete code</a> for
-the sample. </p>
-<p>The
-sample application offers a demo of device admin features. It presents users
+<p>The examples used in this document are based on the Device Administration API
+sample, which is included in the SDK samples (available through the
+Android SDK Manager) and located on your system as 
+<code>&lt;sdk_root&gt;/ApiDemos/app/src/main/java/com/example/android/apis/app/DeviceAdminSample.java</code>.</p>
+
+<p>The sample application offers a demo of device admin features. It presents users
 with a user interface that lets them enable the device admin application. Once
 they've enabled the application, they can use the buttons in the user interface
 to do the following:</p>
@@ -676,7 +664,8 @@
 <p>You can also programmatically tell the device to lock immediately:</p>
 <pre>
 DevicePolicyManager mDPM;
-mDPM.lockNow();</pre>
+mDPM.lockNow();
+</pre>
 
 
 
@@ -692,12 +681,12 @@
 <pre>
 DevicePolicyManager mDPM;
 mDPM.wipeData(0);</pre>
-<p>The {@link android.app.admin.DevicePolicyManager#wipeData wipeData()} method takes as its parameter a bit mask of
-additional options. Currently the value must be 0. </p>
+<p>The {@link android.app.admin.DevicePolicyManager#wipeData wipeData()} method takes as its
+  parameter a bit mask of additional options. Currently the value must be 0. </p>
 
 <h4>Disable camera</h4>
 <p>Beginning with Android 4.0, you can disable the camera. Note that this doesn't have to be a permanent disabling. The camera can be enabled/disabled dynamically based on context, time, and so on. </p>
-<p>You control whether the camera is disabled by using the 
+<p>You control whether the camera is disabled by using the
 {@link android.app.admin.DevicePolicyManager#setCameraDisabled(android.content.ComponentName, boolean) setCameraDisabled()} method. For example, this snippet sets the camera to be enabled or disabled based on a checkbox setting:</p>
 
 <pre>private CheckBoxPreference mDisableCameraCheckbox;
@@ -708,8 +697,8 @@
 </pre>
 
 
-<h4 id=storage">Storage encryption</h4>
-<p>Beginning with Android 3.0, you can use the 
+<h4 id="storage">Storage encryption</h4>
+<p>Beginning with Android 3.0, you can use the
 {@link android.app.admin.DevicePolicyManager#setStorageEncryption(android.content.ComponentName,boolean) setStorageEncryption()} 
 method to set a policy requiring encryption of the storage area, where supported.</p>
 
@@ -722,5 +711,5 @@
 mDPM.setStorageEncryption(mDeviceAdminSample, true);
 </pre>
 <p>
-See the <a href="{@docRoot}resources/samples/ApiDemos/src/com/example/android/apis/app/DeviceAdminSample.html"> Device Administration API sample</a> for a complete
-example of how to enable storage encryption.</p>
+See the Device Administration API sample for a complete example of how to enable storage encryption.
+</p>
\ No newline at end of file
diff --git a/docs/html/guide/topics/renderscript/compute.jd b/docs/html/guide/topics/renderscript/compute.jd
index c62510b..100894c 100644
--- a/docs/html/guide/topics/renderscript/compute.jd
+++ b/docs/html/guide/topics/renderscript/compute.jd
@@ -157,8 +157,7 @@
 
 <ul>
   <li><strong>{@link android.renderscript}</strong> - The APIs in this class package are
-    available on devices running Android 3.0 (API level 11) and higher. These are the original APIs
-    for RenderScript and are not currently being updated.</li>
+    available on devices running Android 3.0 (API level 11) and higher. </li>
   <li><strong>{@link android.support.v8.renderscript}</strong> - The APIs in this package are
     available through a <a href="{@docRoot}tools/support-library/features.html#v8">Support
     Library</a>, which allows you to use them on devices running Android 2.2 (API level 8) and
@@ -166,8 +165,8 @@
 </ul>
 
 <p>We strongly recommend using the Support Library APIs for accessing RenderScript because they
-  include the latest improvements to the RenderScript compute framework and provide a wider range
-  of device compatibility.</p>
+  provide a wider range of device compatibility. Developers targeting specific versions of 
+  Android can use {@link android.renderscript} if necessary.</p>
 
 
 <h3 id="ide-setup">Using the RenderScript Support Library APIs</h3>
@@ -308,4 +307,4 @@
 <li><strong>Tear down the RenderScript context.</strong> The RenderScript context can be destroyed
 with {@link android.renderscript.RenderScript#destroy} or by allowing the RenderScript context
 object to be garbage collected. This will cause any further use of any object belonging to that
-context to throw an exception.</li> </ol>
\ No newline at end of file
+context to throw an exception.</li> </ol>
diff --git a/docs/html/guide/topics/resources/providing-resources.jd b/docs/html/guide/topics/resources/providing-resources.jd
index bf16630..6d9527f 100644
--- a/docs/html/guide/topics/resources/providing-resources.jd
+++ b/docs/html/guide/topics/resources/providing-resources.jd
@@ -389,7 +389,7 @@
             <ul>
               <li>240x320 ldpi (QVGA handset)</li>
               <li>320x480 mdpi (handset)</li>
-              <li>480x800 hdpi (high density handset)</li>
+              <li>480x800 hdpi (high-density handset)</li>
             </ul>
           </li>
           <li>480, for screens such as 480x800 mdpi (tablet/handset).</li>
@@ -483,20 +483,20 @@
         <ul class="nolist">
         <li>{@code small}: Screens that are of similar size to a
         low-density QVGA screen. The minimum layout size for a small screen
-        is approximately 320x426 dp units.  Examples are QVGA low density and VGA high
+        is approximately 320x426 dp units.  Examples are QVGA low-density and VGA high
         density.</li>
         <li>{@code normal}: Screens that are of similar size to a
         medium-density HVGA screen. The minimum
         layout size for a normal screen is approximately 320x470 dp units.  Examples
-        of such screens a WQVGA low density, HVGA medium density, WVGA
-        high density.</li>
+        of such screens a WQVGA low-density, HVGA medium-density, WVGA
+        high-density.</li>
         <li>{@code large}: Screens that are of similar size to a
         medium-density VGA screen.
         The minimum layout size for a large screen is approximately 480x640 dp units.
-        Examples are VGA and WVGA medium density screens.</li>
+        Examples are VGA and WVGA medium-density screens.</li>
         <li>{@code xlarge}: Screens that are considerably larger than the traditional
         medium-density HVGA screen. The minimum layout size for an xlarge screen
-        is approximately 720x960 dp units.  In most cases, devices with extra large
+        is approximately 720x960 dp units.  In most cases, devices with extra-large
         screens would be too large to carry in a pocket and would most likely
         be tablet-style devices. <em>Added in API level 9.</em></li>
         </ul>
@@ -613,6 +613,8 @@
         <code>mdpi</code><br/>
         <code>hdpi</code><br/>
         <code>xhdpi</code><br/>
+        <code>xxhdpi</code><br/>
+        <code>xxxhdpi</code><br/>
         <code>nodpi</code><br/>
         <code>tvdpi</code>
       </td>
@@ -622,8 +624,14 @@
           <li>{@code mdpi}: Medium-density (on traditional HVGA) screens; approximately
 160dpi.</li>
           <li>{@code hdpi}: High-density screens; approximately 240dpi.</li>
-          <li>{@code xhdpi}: Extra high-density screens; approximately 320dpi. <em>Added in API
+          <li>{@code xhdpi}: Extra-high-density screens; approximately 320dpi. <em>Added in API
 Level 8</em></li>
+          <li>{@code xxhdpi}: Extra-extra-high-density screens; approximately 480dpi. <em>Added in API
+Level 16</em></li>
+          <li>{@code xxxhdpi}: Extra-extra-extra-high-density uses (launcher icon only, see the 
+            <a href="{@docRoot}guide/practices/screens_support.html#xxxhdpi-note">note</a> 
+            in <em>Supporting Multiple Screens</em>); approximately 640dpi. <em>Added in API
+Level 18</em></li>
           <li>{@code nodpi}: This can be used for bitmap resources that you do not want to be scaled
 to match the device density.</li>
           <li>{@code tvdpi}: Screens somewhere between mdpi and hdpi; approximately 213dpi. This is
@@ -631,8 +639,9 @@
 apps shouldn't need it&mdash;providing mdpi and hdpi resources is sufficient for most apps and
 the system will scale them as appropriate. This qualifier was introduced with API level 13.</li>
         </ul>
-        <p>There is a 3:4:6:8 scaling ratio between the four primary densities (ignoring the
-tvdpi density). So, a 9x9 bitmap in ldpi is 12x12 in mdpi, 18x18 in hdpi and 24x24 in xhdpi.</p>
+        <p>There is a 3:4:6:8:12:16 scaling ratio between the six primary densities (ignoring the
+tvdpi density). So, a 9x9 bitmap in ldpi is 12x12 in mdpi, 18x18 in hdpi, 24x24 in xhdpi and so on.
+</p>
         <p>If you decide that your image resources don't look good enough on a television or
 other certain devices and want to try tvdpi resources, the scaling factor is 1.33*mdpi. For
 example, a 100px x 100px image for mdpi screens should be 133px x 133px for tvdpi.</p>
diff --git a/docs/html/guide/topics/ui/accessibility/services.jd b/docs/html/guide/topics/ui/accessibility/services.jd
index c868080..d69af9f 100644
--- a/docs/html/guide/topics/ui/accessibility/services.jd
+++ b/docs/html/guide/topics/ui/accessibility/services.jd
@@ -71,24 +71,30 @@
 
 <h3 id="service-declaration">Accessibility service declaration</h3>
 
-<p>In order to be treated as an accessibility service, your application must include the
+<p>In order to be treated as an accessibility service, you must include a
 {@code service} element (rather than the {@code activity} element) within the {@code application}
-element in its manifest. In addition, within the {@code service} element, you must also include an
+element in your manifest. In addition, within the {@code service} element, you must also include an
 accessibility service intent filter. For compatiblity with Android 4.1 and higher, the manifest
 must also request the {@link android.Manifest.permission#BIND_ACCESSIBILITY_SERVICE} permission
 as shown in the following sample:</p>
 
 <pre>
-&lt;application&gt;
-  &lt;service android:name=&quot;.MyAccessibilityService&quot;
-      android:label=&quot;@string/accessibility_service_label&quot;
-      android:permission=&quot;android.permission.BIND_ACCESSIBILITY_SERVICE&quot&gt;
-    &lt;intent-filter&gt;
-      &lt;action android:name=&quot;android.accessibilityservice.AccessibilityService&quot; /&gt;
-    &lt;/intent-filter&gt;
-  &lt;/service&gt;
-  &lt;uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" /&gt;
-&lt;/application&gt;
+&lt;manifest&gt;
+  ...
+  &lt;uses-permission ... /&gt;
+  ...
+  &lt;application&gt;
+    ...
+    &lt;service android:name=&quot;.MyAccessibilityService&quot;
+        android:label=&quot;@string/accessibility_service_label&quot;
+        android:permission=&quot;android.permission.BIND_ACCESSIBILITY_SERVICE&quot&gt;
+      &lt;intent-filter&gt;
+        &lt;action android:name=&quot;android.accessibilityservice.AccessibilityService&quot; /&gt;
+      &lt;/intent-filter&gt;
+    &lt;/service&gt;
+    &lt;uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" /&gt;
+  &lt;/application&gt;
+&lt;/manifest&gt;
 </pre>
 
 <p>These declarations are required for all accessibility services deployed on Android 1.6 (API Level
diff --git a/docs/html/images/tools/projectview01.png b/docs/html/images/tools/projectview01.png
new file mode 100644
index 0000000..90589fb
--- /dev/null
+++ b/docs/html/images/tools/projectview01.png
Binary files differ
diff --git a/docs/html/images/tools/projectview03.png b/docs/html/images/tools/projectview03.png
new file mode 100644
index 0000000..f527ff1
--- /dev/null
+++ b/docs/html/images/tools/projectview03.png
Binary files differ
diff --git a/docs/html/sdk/installing/installing-adt.jd b/docs/html/sdk/installing/installing-adt.jd
index 851827c..5a433d4 100644
--- a/docs/html/sdk/installing/installing-adt.jd
+++ b/docs/html/sdk/installing/installing-adt.jd
@@ -104,7 +104,7 @@
   </tr>
   <tr>
     <td>
-      <a href="http://dl.google.com/android/{@adtZipDownload}">{@adtZipDownload}</a>
+      <a href="https://dl.google.com/android/{@adtZipDownload}">{@adtZipDownload}</a>
     </td>
     <td>{@adtZipBytes} bytes</td>
     <td>{@adtZipChecksum}</td>
diff --git a/docs/html/sdk/installing/studio-androidview.jd b/docs/html/sdk/installing/studio-androidview.jd
new file mode 100644
index 0000000..09aeaba
--- /dev/null
+++ b/docs/html/sdk/installing/studio-androidview.jd
@@ -0,0 +1,55 @@
+page.title=Using the Android Project View
+
+@jd:body
+
+
+<p>The Android project view in Android Studio shows a flattened version of your project's structure
+that provides quick access to the key source files of Android projects and helps you work with
+the new <a href="{@docRoot}sdk/installing/studio-build.html">Gradle-based build system</a>. The
+Android project view:</p>
+
+<ul>
+<li>Groups the build files for all modules at the top level of the project hierarchy.</li>
+<li>Shows the most important source directories at the top level of the module hierarchy.</li>
+<li>Groups all the manifest files for each module.</li>
+<li>Shows resource files from all Gradle source sets.</li>
+<li>Groups resource files for different locales, orientations, and screen types in a single group
+per resource type.</li>
+</ul>
+
+<div style="float:right;margin-left:30px;width:240px">
+<img src="{@docRoot}images/tools/projectview01.png" alt="" width="220" height="264"/>
+<p class="img-caption"><strong>Figure 1:</strong> Show the Android project view.</p>
+</div>
+
+
+<h2 id="enable-view">Enable the Android Project View</h2>
+
+<p>The Android project view is not yet enabled by default. To show the Android project view,
+click <strong>Project</strong> and select <strong>Android</strong>, as shown in Figure 1.</p>
+
+
+<h2 id="project-view">Use the Android Project View</h2>
+
+<p>The Android project view shows all the build files at the top level of the project hierarchy
+under <strong>Gradle Scripts</strong>. Each project module appears as a folder at the top
+level of the project hierarchy and contains these three elements at the top level:</p>
+
+<ul>
+<li><code>java/</code> - Source files for the module.</li>
+<li><code>manifests/</code> - Manifest files for the module.</li>
+<li><code>res/</code> - Resource files for the module.</li>
+</ul>
+
+<p>Figure 2 shows how the Android project view groups all the instances of the
+<code>ic_launcher.png</code> resource for different screen densities under the same element.</p>
+
+<p class="note"><strong>Note:</strong> The Android project view shows a hierarchy that helps you
+work with Android projects by providing a flattened structure that highlights the most commonly
+used files while developing Android applications. However, the project structure on disk differs
+from this representation.</p>
+
+<img src="{@docRoot}images/tools/projectview03.png" alt=""
+     style="margin-top:10px" width="650" height="508"/>
+<p class="img-caption"><strong>Figure 2:</strong> The traditional project view (left) and the
+Android project view (right).</p>
\ No newline at end of file
diff --git a/docs/html/sdk/installing/studio.jd b/docs/html/sdk/installing/studio.jd
index 71d6c1c..ee14b19 100644
--- a/docs/html/sdk/installing/studio.jd
+++ b/docs/html/sdk/installing/studio.jd
@@ -251,7 +251,7 @@
     <td>Windows</td>
     <td>
   <a onclick="return onDownload(this)" id="win-studio"
-      href="http://dl.google.com/android/studio/install/0.8.6/android-studio-bundle-135.1339820-windows.exe">
+      href="https://dl.google.com/android/studio/install/0.8.6/android-studio-bundle-135.1339820-windows.exe">
       android-studio-bundle-135.1339820-windows.exe
       </a>
     </td>
@@ -263,7 +263,7 @@
     <td><nobr>Mac OS X</nobr></td>
     <td>
   <a onclick="return onDownload(this)" id="mac-studio"
-    href="http://dl.google.com/android/studio/install/0.8.6/android-studio-bundle-135.1339820-mac.dmg">
+    href="https://dl.google.com/android/studio/install/0.8.6/android-studio-bundle-135.1339820-mac.dmg">
     android-studio-bundle-135.1339820-mac.dmg
     </a>
     </td>
@@ -275,7 +275,7 @@
     <td>Linux</td>
     <td>
   <a onclick="return onDownload(this)" id="linux-studio"
-    href="http://dl.google.com/android/studio/install/0.8.6/android-studio-bundle-135.1339820-linux.tgz">
+    href="https://dl.google.com/android/studio/install/0.8.6/android-studio-bundle-135.1339820-linux.tgz">
     android-studio-bundle-135.1339820-linux.tgz
     </a>
     </td>
diff --git a/docs/html/tools/tools_toc.cs b/docs/html/tools/tools_toc.cs
index 93e5976..8eb9cbf 100644
--- a/docs/html/tools/tools_toc.cs
+++ b/docs/html/tools/tools_toc.cs
@@ -24,6 +24,8 @@
           Creating a Project</a></li>
       <li><a href="<?cs var:toroot ?>sdk/installing/studio-tips.html">
           Tips and Tricks</a></li>
+      <li><a href="<?cs var:toroot ?>sdk/installing/studio-androidview.html">
+          Using the Android Project View</a></li>
       <li><a href="<?cs var:toroot ?>sdk/installing/studio-layout.html">
           Using the Layout Editor</a></li>
       <li><a href="<?cs var:toroot ?>sdk/installing/studio-build.html">
diff --git a/docs/html/training/location/retrieve-current.jd b/docs/html/training/location/retrieve-current.jd
index 99e475f..f079040 100644
--- a/docs/html/training/location/retrieve-current.jd
+++ b/docs/html/training/location/retrieve-current.jd
@@ -167,13 +167,12 @@
                     "Google Play services is available.");
             // Continue
             return true;
-        // Google Play services was not available for some reason
+        // Google Play services was not available for some reason.
+        // resultCode holds the error code.
         } else {
-            // Get the error code
-            int errorCode = connectionResult.getErrorCode();
             // Get the error dialog from Google Play services
             Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
-                    errorCode,
+                    resultCode,
                     this,
                     CONNECTION_FAILURE_RESOLUTION_REQUEST);
 
diff --git a/docs/html/training/wearables/notifications/creating.jd b/docs/html/training/wearables/notifications/creating.jd
index d6ad34a..9398f96 100644
--- a/docs/html/training/wearables/notifications/creating.jd
+++ b/docs/html/training/wearables/notifications/creating.jd
@@ -208,9 +208,12 @@
         <b>.setStyle(bigStyle);</b>
 </pre>
 
-<p>Notice that you can add a large background image to any notification using the
+<p>Notice that you can add a large icon image to any notification using the
 {@link android.support.v4.app.NotificationCompat.Builder#setLargeIcon setLargeIcon()}
-method. For more information about designing notifications with large images, see the
+method. However, these icons appear as large background images on a wearable and do not look
+good as they are scaled up to fit the wearable screen. To add a wearable-specific background image
+to a notification, see <a href="#AddWearableFeatures">Add Wearable Features For a Notification</a>.
+For more information about designing notifications with large images, see the
 <a href="{@docRoot}design/wear/index.html">Design Principles of Android
 Wear</a>.</p>
 
@@ -244,7 +247,8 @@
 // Create a WearableExtender to add functionality for wearables
 NotificationCompat.WearableExtender wearableExtender =
         new NotificationCompat.WearableExtender()
-        .setHintHideIcon(true);
+        .setHintHideIcon(true)
+        .setBackground(mBitmap);
 
 // Create a NotificationCompat.Builder to build a standard notification
 // then extend it with the WearableExtender
@@ -257,12 +261,21 @@
 </pre>
 
 <p>The
-  {@link android.support.v4.app.NotificationCompat.WearableExtender#setHintHideIcon setHintHideIcon()}
-  method is just one example of new notification features available with
-  {@link android.support.v4.app.NotificationCompat.WearableExtender}.
-</p>
+{@link android.support.v4.app.NotificationCompat.WearableExtender#setHintHideIcon setHintHideIcon()}
+and {@link android.support.v4.app.NotificationCompat.WearableExtender#setBackground setBackground()}
+methods are just two examples of new notification features available with
+{@link android.support.v4.app.NotificationCompat.WearableExtender}.</p>
 
-<p>If you ever need to read wearable-specifc options at a later time, use the corresponding get
+<p class="note"><strong>Note:</strong> The bitmap that you use with
+{@link android.support.v4.app.NotificationCompat.WearableExtender#setBackground setBackground()}
+should have a resolution of 400x400 for non-scrolling backgrounds and 640x400 for backgrounds
+that support parallax scrolling. Place these bitmap images in the <code>res/drawable-nodpi</code>
+directory of your handheld app. Place other non-bitmap resources for wearable notifications, such
+as those used with the
+{@link android.support.v4.app.NotificationCompat.WearableExtender#setContentIcon setContentIcon()}
+method, in the <code>res/drawable-hdpi</code> directory of your handheld app.</p>
+
+<p>If you ever need to read wearable-specific options at a later time, use the corresponding get
 method for the option. This example calls the
 {@link android.support.v4.app.NotificationCompat.WearableExtender#getHintHideIcon()} method to
 get whether or not this notification hides the icon:
@@ -272,6 +285,7 @@
 boolean hintHideIcon = wearableExtender.getHintHideIcon();
 </pre>
 
+
 <h2 id="Deliver">Deliver the Notification</h2>
 <p>When you want to deliver your notifications, always use the
   {@link android.support.v4.app.NotificationManagerCompat} API instead of
diff --git a/docs/html/wear/images/partners/sony.png b/docs/html/wear/images/partners/sony.png
new file mode 100644
index 0000000..3e9483e
--- /dev/null
+++ b/docs/html/wear/images/partners/sony.png
Binary files differ
diff --git a/docs/html/wear/index.jd b/docs/html/wear/index.jd
index 5dd7690..c9a5cff 100644
--- a/docs/html/wear/index.jd
+++ b/docs/html/wear/index.jd
@@ -228,6 +228,10 @@
             <div class="col-4">
               <img src="/wear/images/partners/samsung.png" alt="Samsung">
             </div>
+            <div class="col-4">
+              <img src="/wear/images/partners/sony.png" alt="Sony"
+                   style="margin-left:57px;margin-top:17px;">
+            </div>
           </div>
         </div> <!-- end .wrap -->
       </div>
diff --git a/media/java/android/media/AudioService.java b/media/java/android/media/AudioService.java
index 92474df..32631c9 100644
--- a/media/java/android/media/AudioService.java
+++ b/media/java/android/media/AudioService.java
@@ -745,9 +745,6 @@
         // Broadcast vibrate settings
         broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_RINGER);
         broadcastVibrateSetting(AudioManager.VIBRATE_TYPE_NOTIFICATION);
-
-        // Restore the default media button receiver from the system settings
-        mMediaFocusControl.restoreMediaButtonReceiver();
     }
 
     private int rescaleIndex(int index, int srcStream, int dstStream) {
diff --git a/media/java/android/media/MediaFocusControl.java b/media/java/android/media/MediaFocusControl.java
index 34008bb..5614eac 100644
--- a/media/java/android/media/MediaFocusControl.java
+++ b/media/java/android/media/MediaFocusControl.java
@@ -318,7 +318,6 @@
     //==========================================================================================
 
     // event handler messages
-    private static final int MSG_PERSIST_MEDIABUTTONRECEIVER = 0;
     private static final int MSG_RCDISPLAY_CLEAR = 1;
     private static final int MSG_RCDISPLAY_UPDATE = 2;
     private static final int MSG_REEVALUATE_REMOTE = 3;
@@ -359,9 +358,6 @@
         @Override
         public void handleMessage(Message msg) {
             switch(msg.what) {
-                case MSG_PERSIST_MEDIABUTTONRECEIVER:
-                    onHandlePersistMediaButtonReceiver( (ComponentName) msg.obj );
-                    break;
 
                 case MSG_RCDISPLAY_CLEAR:
                     onRcDisplayClear();
@@ -1427,52 +1423,12 @@
                         }
                     }
                 }
-                if (mRCStack.empty()) {
-                    // no saved media button receiver
-                    mEventHandler.sendMessage(
-                            mEventHandler.obtainMessage(MSG_PERSIST_MEDIABUTTONRECEIVER, 0, 0,
-                                    null));
-                } else if (oldTop != mRCStack.peek()) {
-                    // the top of the stack has changed, save it in the system settings
-                    // by posting a message to persist it; only do this however if it has
-                    // a concrete component name (is not a transient registration)
-                    RemoteControlStackEntry rcse = mRCStack.peek();
-                    if (rcse.mReceiverComponent != null) {
-                        mEventHandler.sendMessage(
-                                mEventHandler.obtainMessage(MSG_PERSIST_MEDIABUTTONRECEIVER, 0, 0,
-                                        rcse.mReceiverComponent));
-                    }
-                }
             }
         }
     }
 
     /**
      * Helper function:
-     * Restore remote control receiver from the system settings.
-     */
-    protected void restoreMediaButtonReceiver() {
-        String receiverName = Settings.System.getStringForUser(mContentResolver,
-                Settings.System.MEDIA_BUTTON_RECEIVER, UserHandle.USER_CURRENT);
-        if ((null != receiverName) && !receiverName.isEmpty()) {
-            ComponentName eventReceiver = ComponentName.unflattenFromString(receiverName);
-            if (eventReceiver == null) {
-                // an invalid name was persisted
-                return;
-            }
-            // construct a PendingIntent targeted to the restored component name
-            // for the media button and register it
-            Intent mediaButtonIntent = new Intent(Intent.ACTION_MEDIA_BUTTON);
-            //     the associated intent will be handled by the component being registered
-            mediaButtonIntent.setComponent(eventReceiver);
-            PendingIntent pi = PendingIntent.getBroadcast(mContext,
-                    0/*requestCode, ignored*/, mediaButtonIntent, 0/*flags*/);
-            registerMediaButtonIntent(pi, eventReceiver, null);
-        }
-    }
-
-    /**
-     * Helper function:
      * Set the new remote control receiver at the top of the RC focus stack.
      * Called synchronized on mAudioFocusLock, then mRCStack
      * precondition: mediaIntent != null
@@ -1509,12 +1465,6 @@
         }
         mRCStack.push(rcse); // rcse is never null
 
-        // post message to persist the default media button receiver
-        if (target != null) {
-            mEventHandler.sendMessage( mEventHandler.obtainMessage(
-                    MSG_PERSIST_MEDIABUTTONRECEIVER, 0, 0, target/*obj*/) );
-        }
-
         // RC stack was modified
         return true;
     }
@@ -1553,12 +1503,6 @@
         return false;
     }
 
-    private void onHandlePersistMediaButtonReceiver(ComponentName receiver) {
-        Settings.System.putStringForUser(mContentResolver,
-                                         Settings.System.MEDIA_BUTTON_RECEIVER,
-                                         receiver == null ? "" : receiver.flattenToString(),
-                                         UserHandle.USER_CURRENT);
-    }
 
     //==========================================================================================
     // Remote control display / client
diff --git a/services/core/java/com/android/server/display/DisplayPowerController.java b/services/core/java/com/android/server/display/DisplayPowerController.java
index 1a36cbf..879e11c 100644
--- a/services/core/java/com/android/server/display/DisplayPowerController.java
+++ b/services/core/java/com/android/server/display/DisplayPowerController.java
@@ -438,7 +438,7 @@
                 y[i] = normalizeAbsoluteBrightness(brightness[i]);
             }
 
-            Spline spline = Spline.createMonotoneCubicSpline(x, y);
+            Spline spline = Spline.createSpline(x, y);
             if (DEBUG) {
                 Slog.d(TAG, "Auto-brightness spline: " + spline);
                 for (float v = 1f; v < lux[lux.length - 1] * 1.25f; v *= 1.25f) {
diff --git a/tools/layoutlib/bridge/src/android/content/res/BridgeTypedArray.java b/tools/layoutlib/bridge/src/android/content/res/BridgeTypedArray.java
index 446d139..0530828 100644
--- a/tools/layoutlib/bridge/src/android/content/res/BridgeTypedArray.java
+++ b/tools/layoutlib/bridge/src/android/content/res/BridgeTypedArray.java
@@ -91,7 +91,7 @@
         // first count the array size
         int count = 0;
         for (ResourceValue data : mResourceData) {
-            if (data != null) {
+            if (data != null && !RenderResources.REFERENCE_NULL.equals(data.getValue())) {
                 count++;
             }
         }
@@ -103,7 +103,8 @@
         // fill the array with the indices.
         int index = 1;
         for (int i = 0 ; i < mResourceData.length ; i++) {
-            if (mResourceData[i] != null) {
+            if (mResourceData[i] != null
+                    && !RenderResources.REFERENCE_NULL.equals(mResourceData[i].getValue())) {
                 mIndices[index++] = i;
             }
         }