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diff --git a/core/java/android/transition/Crossfade.java b/core/java/android/transition/Crossfade.java
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+/*
+ * Copyright (C) 2013 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.transition;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.animation.ObjectAnimator;
+import android.animation.RectEvaluator;
+import android.animation.ValueAnimator;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import android.graphics.drawable.BitmapDrawable;
+import android.util.Log;
+import android.view.SurfaceView;
+import android.view.TextureView;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewOverlay;
+
+import java.util.Map;
+
+/**
+ * This transition captures bitmap representations of target views before and
+ * after the scene change and fades between them.
+ *
+ * <p>Note: This transition is not compatible with {@link TextureView}
+ * or {@link SurfaceView}.</p>
+ *
+ * @hide
+ */
+public class Crossfade extends Transition {
+    // TODO: Add a hook that lets a Transition call user code to query whether it should run on
+    // a given target view. This would save bitmap comparisons in this transition, for example.
+
+    private static final String LOG_TAG = "Crossfade";
+
+    private static final String PROPNAME_BITMAP = "android:crossfade:bitmap";
+    private static final String PROPNAME_DRAWABLE = "android:crossfade:drawable";
+    private static final String PROPNAME_BOUNDS = "android:crossfade:bounds";
+
+    private static RectEvaluator sRectEvaluator = new RectEvaluator();
+
+    private int mFadeBehavior = FADE_BEHAVIOR_REVEAL;
+    private int mResizeBehavior = RESIZE_BEHAVIOR_SCALE;
+
+    /**
+     * Flag specifying that the fading animation should cross-fade
+     * between the old and new representation of all affected target
+     * views. This means that the old representation will fade out
+     * while the new one fades in. This effect may work well on views
+     * without solid backgrounds, such as TextViews.
+     *
+     * @see #setFadeBehavior(int)
+     */
+    public static final int FADE_BEHAVIOR_CROSSFADE = 0;
+    /**
+     * Flag specifying that the fading animation should reveal the
+     * new representation of all affected target views. This means
+     * that the old representation will fade out, gradually
+     * revealing the new representation, which remains opaque
+     * the whole time. This effect may work well on views
+     * with solid backgrounds, such as ImageViews.
+     *
+     * @see #setFadeBehavior(int)
+     */
+    public static final int FADE_BEHAVIOR_REVEAL = 1;
+    /**
+     * Flag specifying that the fading animation should first fade
+     * out the original representation completely and then fade in the
+     * new one. This effect may be more suitable than the other
+     * fade behaviors for views with.
+     *
+     * @see #setFadeBehavior(int)
+     */
+    public static final int FADE_BEHAVIOR_OUT_IN = 2;
+
+    /**
+     * Flag specifying that the transition should not animate any
+     * changes in size between the old and new target views.
+     * This means that no scaling will take place as a result of
+     * this transition
+     *
+     * @see #setResizeBehavior(int)
+     */
+    public static final int RESIZE_BEHAVIOR_NONE = 0;
+    /**
+     * Flag specifying that the transition should animate any
+     * changes in size between the old and new target views.
+     * This means that the animation will scale the start/end
+     * representations of affected views from the starting size
+     * to the ending size over the course of the animation.
+     * This effect may work well on images, but is not recommended
+     * for text.
+     *
+     * @see #setResizeBehavior(int)
+     */
+    public static final int RESIZE_BEHAVIOR_SCALE = 1;
+
+    // TODO: Add fade/resize behaviors to xml resources
+
+    /**
+     * Sets the type of fading animation that will be run, one of
+     * {@link #FADE_BEHAVIOR_CROSSFADE} and {@link #FADE_BEHAVIOR_REVEAL}.
+     *
+     * @param fadeBehavior The type of fading animation to use when this
+     * transition is run.
+     */
+    public Crossfade setFadeBehavior(int fadeBehavior) {
+        if (fadeBehavior >= FADE_BEHAVIOR_CROSSFADE && fadeBehavior <= FADE_BEHAVIOR_OUT_IN) {
+            mFadeBehavior = fadeBehavior;
+        }
+        return this;
+    }
+
+    /**
+     * Returns the fading behavior of the animation.
+     *
+     * @return This crossfade object.
+     * @see #setFadeBehavior(int)
+     */
+    public int getFadeBehavior() {
+        return mFadeBehavior;
+    }
+
+    /**
+     * Sets the type of resizing behavior that will be used during the
+     * transition animation, one of {@link #RESIZE_BEHAVIOR_NONE} and
+     * {@link #RESIZE_BEHAVIOR_SCALE}.
+     *
+     * @param resizeBehavior The type of resizing behavior to use when this
+     * transition is run.
+     */
+    public Crossfade setResizeBehavior(int resizeBehavior) {
+        if (resizeBehavior >= RESIZE_BEHAVIOR_NONE && resizeBehavior <= RESIZE_BEHAVIOR_SCALE) {
+            mResizeBehavior = resizeBehavior;
+        }
+        return this;
+    }
+
+    /**
+     * Returns the resizing behavior of the animation.
+     *
+     * @return This crossfade object.
+     * @see #setResizeBehavior(int)
+     */
+    public int getResizeBehavior() {
+        return mResizeBehavior;
+    }
+
+    @Override
+    public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues,
+            TransitionValues endValues) {
+        if (startValues == null || endValues == null) {
+            return null;
+        }
+        final boolean useParentOverlay = mFadeBehavior != FADE_BEHAVIOR_REVEAL;
+        final View view = endValues.view;
+        Map<String, Object> startVals = startValues.values;
+        Map<String, Object> endVals = endValues.values;
+        Rect startBounds = (Rect) startVals.get(PROPNAME_BOUNDS);
+        Rect endBounds = (Rect) endVals.get(PROPNAME_BOUNDS);
+        Bitmap startBitmap = (Bitmap) startVals.get(PROPNAME_BITMAP);
+        Bitmap endBitmap = (Bitmap) endVals.get(PROPNAME_BITMAP);
+        final BitmapDrawable startDrawable = (BitmapDrawable) startVals.get(PROPNAME_DRAWABLE);
+        final BitmapDrawable endDrawable = (BitmapDrawable) endVals.get(PROPNAME_DRAWABLE);
+        if (Transition.DBG) {
+            Log.d(LOG_TAG, "StartBitmap.sameAs(endBitmap) = " + startBitmap.sameAs(endBitmap) +
+                    " for start, end: " + startBitmap + ", " + endBitmap);
+        }
+        if (startDrawable != null && endDrawable != null && !startBitmap.sameAs(endBitmap)) {
+            ViewOverlay overlay = useParentOverlay ?
+                    ((ViewGroup) view.getParent()).getOverlay() : view.getOverlay();
+            if (mFadeBehavior == FADE_BEHAVIOR_REVEAL) {
+                overlay.add(endDrawable);
+            }
+            overlay.add(startDrawable);
+            // The transition works by placing the end drawable under the start drawable and
+            // gradually fading out the start drawable. So it's not really a cross-fade, but rather
+            // a reveal of the end scene over time. Also, animate the bounds of both drawables
+            // to mimic the change in the size of the view itself between scenes.
+            ObjectAnimator anim;
+            if (mFadeBehavior == FADE_BEHAVIOR_OUT_IN) {
+                // Fade out completely halfway through the transition
+                anim = ObjectAnimator.ofInt(startDrawable, "alpha", 255, 0, 0);
+            } else {
+                anim = ObjectAnimator.ofInt(startDrawable, "alpha", 0);
+            }
+            anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+                @Override
+                public void onAnimationUpdate(ValueAnimator animation) {
+                    // TODO: some way to auto-invalidate views based on drawable changes? callbacks?
+                    view.invalidate(startDrawable.getBounds());
+                }
+            });
+            ObjectAnimator anim1 = null;
+            if (mFadeBehavior == FADE_BEHAVIOR_OUT_IN) {
+                // start fading in halfway through the transition
+                anim1 = ObjectAnimator.ofFloat(view, View.ALPHA, 0, 0, 1);
+            } else if (mFadeBehavior == FADE_BEHAVIOR_CROSSFADE) {
+                anim1 = ObjectAnimator.ofFloat(view, View.ALPHA, 0, 1);
+            }
+            if (Transition.DBG) {
+                Log.d(LOG_TAG, "Crossfade: created anim " + anim + " for start, end values " +
+                        startValues + ", " + endValues);
+            }
+            anim.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    ViewOverlay overlay = useParentOverlay ?
+                            ((ViewGroup) view.getParent()).getOverlay() : view.getOverlay();
+                    overlay.remove(startDrawable);
+                    if (mFadeBehavior == FADE_BEHAVIOR_REVEAL) {
+                        overlay.remove(endDrawable);
+                    }
+                }
+            });
+            AnimatorSet set = new AnimatorSet();
+            set.playTogether(anim);
+            if (anim1 != null) {
+                set.playTogether(anim1);
+            }
+            if (mResizeBehavior == RESIZE_BEHAVIOR_SCALE && !startBounds.equals(endBounds)) {
+                if (Transition.DBG) {
+                    Log.d(LOG_TAG, "animating from startBounds to endBounds: " +
+                            startBounds + ", " + endBounds);
+                }
+                Animator anim2 = ObjectAnimator.ofObject(startDrawable, "bounds",
+                        sRectEvaluator, startBounds, endBounds);
+                set.playTogether(anim2);
+                if (mResizeBehavior == RESIZE_BEHAVIOR_SCALE) {
+                    // TODO: How to handle resizing with a CROSSFADE (vs. REVEAL) effect
+                    // when we are animating the view directly?
+                    Animator anim3 = ObjectAnimator.ofObject(endDrawable, "bounds",
+                            sRectEvaluator, startBounds, endBounds);
+                    set.playTogether(anim3);
+                }
+            }
+            return set;
+        } else {
+            return null;
+        }
+    }
+
+    private void captureValues(TransitionValues transitionValues) {
+        View view = transitionValues.view;
+        Rect bounds = new Rect(0, 0, view.getWidth(), view.getHeight());
+        if (mFadeBehavior != FADE_BEHAVIOR_REVEAL) {
+            bounds.offset(view.getLeft(), view.getTop());
+        }
+        transitionValues.values.put(PROPNAME_BOUNDS, bounds);
+
+        if (Transition.DBG) {
+            Log.d(LOG_TAG, "Captured bounds " + transitionValues.values.get(PROPNAME_BOUNDS));
+        }
+        Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),
+                Bitmap.Config.ARGB_8888);
+        if (view instanceof TextureView) {
+            bitmap = ((TextureView) view).getBitmap();
+        } else {
+            Canvas c = new Canvas(bitmap);
+            view.draw(c);
+        }
+        transitionValues.values.put(PROPNAME_BITMAP, bitmap);
+        // TODO: I don't have resources, can't call the non-deprecated method?
+        BitmapDrawable drawable = new BitmapDrawable(bitmap);
+        // TODO: lrtb will be wrong if the view has transXY set
+        drawable.setBounds(bounds);
+        transitionValues.values.put(PROPNAME_DRAWABLE, drawable);
+    }
+
+    @Override
+    public void captureStartValues(TransitionValues transitionValues) {
+        captureValues(transitionValues);
+    }
+
+    @Override
+    public void captureEndValues(TransitionValues transitionValues) {
+        captureValues(transitionValues);
+    }
+}