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diff --git a/java/com/android/contacts/common/widget/FloatingActionButtonController.java b/java/com/android/contacts/common/widget/FloatingActionButtonController.java
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+++ b/java/com/android/contacts/common/widget/FloatingActionButtonController.java
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+/*
+ * Copyright (C) 2014 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 com.android.contacts.common.widget;
+
+import android.app.Activity;
+import android.content.res.Resources;
+import android.graphics.drawable.Drawable;
+import android.view.View;
+import android.view.animation.AnimationUtils;
+import android.view.animation.Interpolator;
+import android.widget.ImageButton;
+import com.android.contacts.common.R;
+import com.android.contacts.common.util.FabUtil;
+import com.android.dialer.animation.AnimUtils;
+
+/** Controls the movement and appearance of the FAB (Floating Action Button). */
+public class FloatingActionButtonController {
+
+  public static final int ALIGN_MIDDLE = 0;
+  public static final int ALIGN_QUARTER_END = 1;
+  public static final int ALIGN_END = 2;
+
+  private static final int FAB_SCALE_IN_DURATION = 266;
+  private static final int FAB_SCALE_IN_FADE_IN_DELAY = 100;
+  private static final int FAB_ICON_FADE_OUT_DURATION = 66;
+
+  private final int mAnimationDuration;
+  private final int mFloatingActionButtonWidth;
+  private final int mFloatingActionButtonMarginRight;
+  private final View mFloatingActionButtonContainer;
+  private final ImageButton mFloatingActionButton;
+  private final Interpolator mFabInterpolator;
+  private int mScreenWidth;
+
+  public FloatingActionButtonController(Activity activity, View container, ImageButton button) {
+    Resources resources = activity.getResources();
+    mFabInterpolator =
+        AnimationUtils.loadInterpolator(activity, android.R.interpolator.fast_out_slow_in);
+    mFloatingActionButtonWidth =
+        resources.getDimensionPixelSize(R.dimen.floating_action_button_width);
+    mFloatingActionButtonMarginRight =
+        resources.getDimensionPixelOffset(R.dimen.floating_action_button_margin_right);
+    mAnimationDuration = resources.getInteger(R.integer.floating_action_button_animation_duration);
+    mFloatingActionButtonContainer = container;
+    mFloatingActionButton = button;
+    FabUtil.setupFloatingActionButton(mFloatingActionButtonContainer, resources);
+  }
+
+  /**
+   * Passes the screen width into the class. Necessary for translation calculations. Should be
+   * called as soon as parent View width is available.
+   *
+   * @param screenWidth The width of the screen in pixels.
+   */
+  public void setScreenWidth(int screenWidth) {
+    mScreenWidth = screenWidth;
+  }
+
+  public boolean isVisible() {
+    return mFloatingActionButtonContainer.getVisibility() == View.VISIBLE;
+  }
+
+  /**
+   * Sets FAB as View.VISIBLE or View.GONE.
+   *
+   * @param visible Whether or not to make the container visible.
+   */
+  public void setVisible(boolean visible) {
+    mFloatingActionButtonContainer.setVisibility(visible ? View.VISIBLE : View.GONE);
+  }
+
+  public void changeIcon(Drawable icon, String description) {
+    if (mFloatingActionButton.getDrawable() != icon
+        || !mFloatingActionButton.getContentDescription().equals(description)) {
+      mFloatingActionButton.setImageDrawable(icon);
+      mFloatingActionButton.setContentDescription(description);
+    }
+  }
+
+  /**
+   * Updates the FAB location (middle to right position) as the PageView scrolls.
+   *
+   * @param positionOffset A fraction used to calculate position of the FAB during page scroll.
+   */
+  public void onPageScrolled(float positionOffset) {
+    // As the page is scrolling, if we're on the first tab, update the FAB position so it
+    // moves along with it.
+    mFloatingActionButtonContainer.setTranslationX(
+        (int) (positionOffset * getTranslationXForAlignment(ALIGN_END)));
+  }
+
+  /**
+   * Aligns the FAB to the described location
+   *
+   * @param align One of ALIGN_MIDDLE, ALIGN_QUARTER_RIGHT, or ALIGN_RIGHT.
+   * @param animate Whether or not to animate the transition.
+   */
+  public void align(int align, boolean animate) {
+    align(align, 0 /*offsetX */, 0 /* offsetY */, animate);
+  }
+
+  /**
+   * Aligns the FAB to the described location plus specified additional offsets.
+   *
+   * @param align One of ALIGN_MIDDLE, ALIGN_QUARTER_RIGHT, or ALIGN_RIGHT.
+   * @param offsetX Additional offsetX to translate by.
+   * @param offsetY Additional offsetY to translate by.
+   * @param animate Whether or not to animate the transition.
+   */
+  public void align(int align, int offsetX, int offsetY, boolean animate) {
+    if (mScreenWidth == 0) {
+      return;
+    }
+
+    int translationX = getTranslationXForAlignment(align);
+
+    // Skip animation if container is not shown; animation causes container to show again.
+    if (animate && mFloatingActionButtonContainer.isShown()) {
+      mFloatingActionButtonContainer
+          .animate()
+          .translationX(translationX + offsetX)
+          .translationY(offsetY)
+          .setInterpolator(mFabInterpolator)
+          .setDuration(mAnimationDuration)
+          .start();
+    } else {
+      mFloatingActionButtonContainer.setTranslationX(translationX + offsetX);
+      mFloatingActionButtonContainer.setTranslationY(offsetY);
+    }
+  }
+
+  /**
+   * Resizes width and height of the floating action bar container.
+   *
+   * @param dimension The new dimensions for the width and height.
+   * @param animate Whether to animate this change.
+   */
+  public void resize(int dimension, boolean animate) {
+    if (animate) {
+      AnimUtils.changeDimensions(mFloatingActionButtonContainer, dimension, dimension);
+    } else {
+      mFloatingActionButtonContainer.getLayoutParams().width = dimension;
+      mFloatingActionButtonContainer.getLayoutParams().height = dimension;
+      mFloatingActionButtonContainer.requestLayout();
+    }
+  }
+
+  /**
+   * Scales the floating action button from no height and width to its actual dimensions. This is an
+   * animation for showing the floating action button.
+   *
+   * @param delayMs The delay for the effect, in milliseconds.
+   */
+  public void scaleIn(int delayMs) {
+    setVisible(true);
+    AnimUtils.scaleIn(mFloatingActionButtonContainer, FAB_SCALE_IN_DURATION, delayMs);
+    AnimUtils.fadeIn(
+        mFloatingActionButton, FAB_SCALE_IN_DURATION, delayMs + FAB_SCALE_IN_FADE_IN_DELAY, null);
+  }
+
+  /** Immediately remove the affects of the last call to {@link #scaleOut}. */
+  public void resetIn() {
+    mFloatingActionButton.setAlpha(1f);
+    mFloatingActionButton.setVisibility(View.VISIBLE);
+    mFloatingActionButtonContainer.setScaleX(1);
+    mFloatingActionButtonContainer.setScaleY(1);
+  }
+
+  /**
+   * Scales the floating action button from its actual dimensions to no height and width. This is an
+   * animation for hiding the floating action button.
+   */
+  public void scaleOut() {
+    AnimUtils.scaleOut(mFloatingActionButtonContainer, mAnimationDuration);
+    // Fade out the icon faster than the scale out animation, so that the icon scaling is less
+    // obvious. We don't want it to scale, but the resizing the container is not as performant.
+    AnimUtils.fadeOut(mFloatingActionButton, FAB_ICON_FADE_OUT_DURATION, null);
+  }
+
+  /**
+   * Calculates the X offset of the FAB to the given alignment, adjusted for whether or not the view
+   * is in RTL mode.
+   *
+   * @param align One of ALIGN_MIDDLE, ALIGN_QUARTER_RIGHT, or ALIGN_RIGHT.
+   * @return The translationX for the given alignment.
+   */
+  public int getTranslationXForAlignment(int align) {
+    int result = 0;
+    switch (align) {
+      case ALIGN_MIDDLE:
+        // Moves the FAB to exactly center screen.
+        return 0;
+      case ALIGN_QUARTER_END:
+        // Moves the FAB a quarter of the screen width.
+        result = mScreenWidth / 4;
+        break;
+      case ALIGN_END:
+        // Moves the FAB half the screen width. Same as aligning right with a marginRight.
+        result =
+            mScreenWidth / 2 - mFloatingActionButtonWidth / 2 - mFloatingActionButtonMarginRight;
+        break;
+    }
+    if (isLayoutRtl()) {
+      result *= -1;
+    }
+    return result;
+  }
+
+  private boolean isLayoutRtl() {
+    return mFloatingActionButtonContainer.getLayoutDirection() == View.LAYOUT_DIRECTION_RTL;
+  }
+}