diff --git a/android/view/DisplayEventReceiver.java b/android/view/DisplayEventReceiver.java
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+++ b/android/view/DisplayEventReceiver.java
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+/*
+ * Copyright (C) 2011 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.
+ */
+
+package android.view;
+
+import android.annotation.UnsupportedAppUsage;
+import android.os.Looper;
+import android.os.MessageQueue;
+import android.util.Log;
+
+import dalvik.annotation.optimization.FastNative;
+import dalvik.system.CloseGuard;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * Provides a low-level mechanism for an application to receive display events
+ * such as vertical sync.
+ *
+ * The display event receive is NOT thread safe.  Moreover, its methods must only
+ * be called on the Looper thread to which it is attached.
+ *
+ * @hide
+ */
+public abstract class DisplayEventReceiver {
+
+    /**
+     * When retrieving vsync events, this specifies that the vsync event should happen at the normal
+     * vsync-app tick.
+     * <p>
+     * Needs to be kept in sync with frameworks/native/include/gui/ISurfaceComposer.h
+     */
+    public static final int VSYNC_SOURCE_APP = 0;
+
+    /**
+     * When retrieving vsync events, this specifies that the vsync event should happen whenever
+     * Surface Flinger is processing a frame.
+     * <p>
+     * Needs to be kept in sync with frameworks/native/include/gui/ISurfaceComposer.h
+     */
+    public static final int VSYNC_SOURCE_SURFACE_FLINGER = 1;
+
+    private static final String TAG = "DisplayEventReceiver";
+
+    private final CloseGuard mCloseGuard = CloseGuard.get();
+
+    @UnsupportedAppUsage
+    private long mReceiverPtr;
+
+    // We keep a reference message queue object here so that it is not
+    // GC'd while the native peer of the receiver is using them.
+    private MessageQueue mMessageQueue;
+
+    private static native long nativeInit(WeakReference<DisplayEventReceiver> receiver,
+            MessageQueue messageQueue, int vsyncSource);
+    private static native void nativeDispose(long receiverPtr);
+    @FastNative
+    private static native void nativeScheduleVsync(long receiverPtr);
+
+    /**
+     * Creates a display event receiver.
+     *
+     * @param looper The looper to use when invoking callbacks.
+     */
+    @UnsupportedAppUsage
+    public DisplayEventReceiver(Looper looper) {
+        this(looper, VSYNC_SOURCE_APP);
+    }
+
+    /**
+     * Creates a display event receiver.
+     *
+     * @param looper The looper to use when invoking callbacks.
+     * @param vsyncSource The source of the vsync tick. Must be on of the VSYNC_SOURCE_* values.
+     */
+    public DisplayEventReceiver(Looper looper, int vsyncSource) {
+        if (looper == null) {
+            throw new IllegalArgumentException("looper must not be null");
+        }
+
+        mMessageQueue = looper.getQueue();
+        mReceiverPtr = nativeInit(new WeakReference<DisplayEventReceiver>(this), mMessageQueue,
+                vsyncSource);
+
+        mCloseGuard.open("dispose");
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        try {
+            dispose(true);
+        } finally {
+            super.finalize();
+        }
+    }
+
+    /**
+     * Disposes the receiver.
+     */
+    public void dispose() {
+        dispose(false);
+    }
+
+    private void dispose(boolean finalized) {
+        if (mCloseGuard != null) {
+            if (finalized) {
+                mCloseGuard.warnIfOpen();
+            }
+            mCloseGuard.close();
+        }
+
+        if (mReceiverPtr != 0) {
+            nativeDispose(mReceiverPtr);
+            mReceiverPtr = 0;
+        }
+        mMessageQueue = null;
+    }
+
+    /**
+     * Called when a vertical sync pulse is received.
+     * The recipient should render a frame and then call {@link #scheduleVsync}
+     * to schedule the next vertical sync pulse.
+     *
+     * @param timestampNanos The timestamp of the pulse, in the {@link System#nanoTime()}
+     * timebase.
+     * @param physicalDisplayId Stable display ID that uniquely describes a (display, port) pair.
+     * @param frame The frame number.  Increases by one for each vertical sync interval.
+     */
+    @UnsupportedAppUsage
+    public void onVsync(long timestampNanos, long physicalDisplayId, int frame) {
+    }
+
+    /**
+     * Called when a display hotplug event is received.
+     *
+     * @param timestampNanos The timestamp of the event, in the {@link System#nanoTime()}
+     * timebase.
+     * @param physicalDisplayId Stable display ID that uniquely describes a (display, port) pair.
+     * @param connected True if the display is connected, false if it disconnected.
+     */
+    @UnsupportedAppUsage
+    public void onHotplug(long timestampNanos, long physicalDisplayId, boolean connected) {
+    }
+
+    /**
+     * Called when a display config changed event is received.
+     *
+     * @param timestampNanos The timestamp of the event, in the {@link System#nanoTime()}
+     * timebase.
+     * @param physicalDisplayId Stable display ID that uniquely describes a (display, port) pair.
+     * @param configId The new config Id
+     */
+    public void onConfigChanged(long timestampNanos, long physicalDisplayId, int configId) {
+    }
+
+    /**
+     * Schedules a single vertical sync pulse to be delivered when the next
+     * display frame begins.
+     */
+    @UnsupportedAppUsage
+    public void scheduleVsync() {
+        if (mReceiverPtr == 0) {
+            Log.w(TAG, "Attempted to schedule a vertical sync pulse but the display event "
+                    + "receiver has already been disposed.");
+        } else {
+            nativeScheduleVsync(mReceiverPtr);
+        }
+    }
+
+    // Called from native code.
+    @SuppressWarnings("unused")
+    @UnsupportedAppUsage
+    private void dispatchVsync(long timestampNanos, long physicalDisplayId, int frame) {
+        onVsync(timestampNanos, physicalDisplayId, frame);
+    }
+
+    // Called from native code.
+    @SuppressWarnings("unused")
+    @UnsupportedAppUsage
+    private void dispatchHotplug(long timestampNanos, long physicalDisplayId, boolean connected) {
+        onHotplug(timestampNanos, physicalDisplayId, connected);
+    }
+
+    // Called from native code.
+    @SuppressWarnings("unused")
+    private void dispatchConfigChanged(long timestampNanos, long physicalDisplayId, int configId) {
+        onConfigChanged(timestampNanos, physicalDisplayId, configId);
+    }
+
+}