chrome/android/java/src/org/chromium/chrome/browser/toolbar/MenuButton.java - chromium/src - Git at Google

 // Copyright 2018 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 package org.chromium.chrome.browser.toolbar;

 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.content.Context;
 import android.content.res.ColorStateList;
 import android.support.annotation.DrawableRes;
 import android.support.v4.view.ViewCompat;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.animation.LinearInterpolator;
 import android.widget.FrameLayout;
 import android.widget.ImageButton;
 import android.widget.ImageView;

 import org.chromium.base.ApiCompatibilityUtils;
 import org.chromium.chrome.R;
 import org.chromium.chrome.browser.ThemeColorProvider;
 import org.chromium.chrome.browser.ThemeColorProvider.TintObserver;
 import org.chromium.chrome.browser.appmenu.AppMenuButtonHelper;
 import org.chromium.chrome.browser.omaha.UpdateMenuItemHelper;
 import org.chromium.chrome.browser.omaha.UpdateMenuItemHelper.MenuButtonState;
 import org.chromium.chrome.browser.widget.PulseDrawable;
 import org.chromium.ui.UiUtils;
 import org.chromium.ui.interpolators.BakedBezierInterpolator;

 /**
  * The overflow menu button.
  */
 public class MenuButton extends FrameLayout implements TintObserver {
     /** The {@link ImageButton} for the menu button. */
     private ImageButton mMenuImageButton;

     /** The view for the update badge. */
     private ImageView mUpdateBadgeView;
     private boolean mUseLightDrawables;

     private AppMenuButtonHelper mAppMenuButtonHelper;

     private boolean mHighlightingMenu;
     private PulseDrawable mHighlightDrawable;

     private boolean mShowMenuBadge;
     private AnimatorSet mMenuBadgeAnimatorSet;
     private boolean mIsMenuBadgeAnimationRunning;

     /** A provider that notifies components when the theme color changes.*/
     private ThemeColorProvider mThemeColorProvider;

     public MenuButton(Context context, AttributeSet attrs) {
         super(context, attrs);
     }

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mMenuImageButton = findViewById(R.id.menu_button);
         mUpdateBadgeView = findViewById(R.id.menu_badge);
     }

     public void setAppMenuButtonHelper(AppMenuButtonHelper appMenuButtonHelper) {
         mAppMenuButtonHelper = appMenuButtonHelper;
         mMenuImageButton.setOnTouchListener(mAppMenuButtonHelper);
         mMenuImageButton.setAccessibilityDelegate(mAppMenuButtonHelper);
     }

     public AppMenuButtonHelper getAppMenuButtonHelper() {
         return mAppMenuButtonHelper;
     }

     public View getMenuBadge() {
         return mUpdateBadgeView;
     }

     public ImageButton getImageButton() {
         return mMenuImageButton;
     }

     /**
      * Sets the update badge to visible if the update state requires it.
      *
      * @param visible Whether the update badge should be visible. Always sets visibility to GONE
      *                if the update type does not require a badge.
      * TODO(crbug.com/865801): Clean this up when MenuButton and UpdateMenuItemHelper is MVCed.
      */
     private void setUpdateBadgeVisibilityIfValidState(boolean visible) {
         MenuButtonState buttonState = UpdateMenuItemHelper.getInstance().getUiState().buttonState;

         visible &= buttonState != null;

         mUpdateBadgeView.setVisibility(visible ? View.VISIBLE : View.GONE);
         if (visible) updateImageResources();
         updateContentDescription(visible);
     }

     public void updateImageResources() {
         MenuButtonState buttonState = UpdateMenuItemHelper.getInstance().getUiState().buttonState;
         if (buttonState == null) return;
         @DrawableRes
         int drawable = mUseLightDrawables ? buttonState.lightBadgeIcon : buttonState.darkBadgeIcon;
         mUpdateBadgeView.setImageDrawable(
                 ApiCompatibilityUtils.getDrawable(getResources(), drawable));
     }

     public void showAppMenuUpdateBadge(boolean animate) {
         if (mUpdateBadgeView == null) return;
         mShowMenuBadge = true;
         updateImageResources();

         setAppMenuUpdateBadgeToVisible(animate);
     }

     public void removeAppMenuUpdateBadge(boolean animate) {
         if (mUpdateBadgeView == null) return;
         boolean wasShowingMenuBadge = mShowMenuBadge;
         mShowMenuBadge = false;
         updateContentDescription(false);

         if (!animate || !wasShowingMenuBadge) {
             setUpdateBadgeVisibilityIfValidState(false);
             return;
         }

         if (mIsMenuBadgeAnimationRunning && mMenuBadgeAnimatorSet != null) {
             mMenuBadgeAnimatorSet.cancel();
         }

         // Set initial states.
         mMenuImageButton.setAlpha(0.f);

         mMenuBadgeAnimatorSet = createHideUpdateBadgeAnimation(mMenuImageButton, mUpdateBadgeView);

         mMenuBadgeAnimatorSet.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
                 mIsMenuBadgeAnimationRunning = true;
             }

             @Override
             public void onAnimationEnd(Animator animation) {
                 mIsMenuBadgeAnimationRunning = false;
             }

             @Override
             public void onAnimationCancel(Animator animation) {
                 mIsMenuBadgeAnimationRunning = false;
             }
         });

         mMenuBadgeAnimatorSet.start();
     }

     /**
      * @return Whether the update badge is showing.
      */
     public boolean isShowingAppMenuUpdateBadge() {
         return mUpdateBadgeView.getVisibility() == View.VISIBLE;
     }

     /**
      * Sets the update badge visibility to VISIBLE and sets the menu button image to the badged
      * bitmap.
      */
     private void setAppMenuUpdateBadgeToVisible(boolean animate) {
         if (mUpdateBadgeView == null || mMenuImageButton == null) return;
         updateContentDescription(true);
         if (!animate || mIsMenuBadgeAnimationRunning) {
             setUpdateBadgeVisibilityIfValidState(true);
             return;
         }

         // Set initial states.
         mUpdateBadgeView.setAlpha(0.f);
         mUpdateBadgeView.setVisibility(View.VISIBLE);

         mMenuBadgeAnimatorSet = createShowUpdateBadgeAnimation(mMenuImageButton, mUpdateBadgeView);

         mMenuBadgeAnimatorSet.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationStart(Animator animation) {
                 mIsMenuBadgeAnimationRunning = true;
             }

             @Override
             public void onAnimationEnd(Animator animation) {
                 mIsMenuBadgeAnimationRunning = false;
             }

             @Override
             public void onAnimationCancel(Animator animation) {
                 mIsMenuBadgeAnimationRunning = false;
             }
         });

         mMenuBadgeAnimatorSet.start();
     }

     /**
      * Sets the content description for the menu button.
      * @param isUpdateBadgeVisible Whether the update menu badge is visible.
      */
     private void updateContentDescription(boolean isUpdateBadgeVisible) {
         if (isUpdateBadgeVisible) {
             MenuButtonState buttonState =
                     UpdateMenuItemHelper.getInstance().getUiState().buttonState;
             assert buttonState != null : "No button state when trying to show the badge.";
             mMenuImageButton.setContentDescription(
                     getResources().getString(buttonState.menuContentDescription));
         } else {
             mMenuImageButton.setContentDescription(
                     getResources().getString(R.string.accessibility_toolbar_btn_menu));
         }
     }

     /**
      * Sets the menu button's background depending on whether or not we are highlighting and whether
      * or not we are using light or dark assets.
      */
     public void setMenuButtonHighlightDrawable() {
         // Return if onFinishInflate didn't finish
         if (mMenuImageButton == null) return;

         if (mHighlightingMenu) {
             if (mHighlightDrawable == null) {
                 mHighlightDrawable = PulseDrawable.createCircle(getContext());
                 mHighlightDrawable.setInset(ViewCompat.getPaddingStart(mMenuImageButton),
                         mMenuImageButton.getPaddingTop(),
                         ViewCompat.getPaddingEnd(mMenuImageButton),
                         mMenuImageButton.getPaddingBottom());
             }
             mHighlightDrawable.setUseLightPulseColor(mUseLightDrawables);
             setBackground(mHighlightDrawable);
             mHighlightDrawable.start();
         } else {
             setBackground(null);
         }
     }

     public void setMenuButtonHighlight(boolean highlight) {
         mHighlightingMenu = highlight;
         setMenuButtonHighlightDrawable();
     }

     public void setThemeColorProvider(ThemeColorProvider themeColorProvider) {
         mThemeColorProvider = themeColorProvider;
         mThemeColorProvider.addTintObserver(this);
     }

     @Override
     public void onTintChanged(ColorStateList tintList, boolean useLight) {
         ApiCompatibilityUtils.setImageTintList(mMenuImageButton, tintList);
         mUseLightDrawables = useLight;
         updateImageResources();
     }

     public void destroy() {
         if (mThemeColorProvider != null) {
             mThemeColorProvider.removeTintObserver(this);
             mThemeColorProvider = null;
         }
         UiUtils.removeViewFromParent(this);
     }

     /**
      * Creates an {@link AnimatorSet} for showing the update badge that is displayed on top
      * of the app menu button.
      *
      * @param menuButton The {@link View} containing the app menu button.
      * @param menuBadge The {@link View} containing the update badge.
      * @return An {@link AnimatorSet} to run when showing the update badge.
      */
     private static AnimatorSet createShowUpdateBadgeAnimation(
             final View menuButton, final View menuBadge) {
         // Create badge ObjectAnimators.
         ObjectAnimator badgeFadeAnimator = ObjectAnimator.ofFloat(menuBadge, View.ALPHA, 1.f);
         badgeFadeAnimator.setInterpolator(BakedBezierInterpolator.FADE_IN_CURVE);

         int pixelTranslation = menuBadge.getResources().getDimensionPixelSize(
                 R.dimen.menu_badge_translation_y_distance);
         ObjectAnimator badgeTranslateYAnimator =
                 ObjectAnimator.ofFloat(menuBadge, View.TRANSLATION_Y, pixelTranslation, 0.f);
         badgeTranslateYAnimator.setInterpolator(BakedBezierInterpolator.TRANSFORM_CURVE);

         // Create menu button ObjectAnimator.
         ObjectAnimator menuButtonFadeAnimator = ObjectAnimator.ofFloat(menuButton, View.ALPHA, 0.f);
         menuButtonFadeAnimator.setInterpolator(new LinearInterpolator());

         // Create AnimatorSet and listeners.
         AnimatorSet set = new AnimatorSet();
         set.playTogether(badgeFadeAnimator, badgeTranslateYAnimator, menuButtonFadeAnimator);
         set.setDuration(350);
         set.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
                 // Make sure the menu button is visible again.
                 menuButton.setAlpha(1.f);
             }

             @Override
             public void onAnimationCancel(Animator animation) {
                 // Jump to the end state if the animation is canceled.
                 menuBadge.setAlpha(1.f);
                 menuBadge.setTranslationY(0.f);
                 menuButton.setAlpha(1.f);
             }
         });

         return set;
     }

     /**
      * Creates an {@link AnimatorSet} for hiding the update badge that is displayed on top
      * of the app menu button.
      *
      * @param menuButton The {@link View} containing the app menu button.
      * @param menuBadge The {@link View} containing the update badge.
      * @return An {@link AnimatorSet} to run when hiding the update badge.
      */
     private static AnimatorSet createHideUpdateBadgeAnimation(
             final View menuButton, final View menuBadge) {
         // Create badge ObjectAnimator.
         ObjectAnimator badgeFadeAnimator = ObjectAnimator.ofFloat(menuBadge, View.ALPHA, 0.f);
         badgeFadeAnimator.setInterpolator(BakedBezierInterpolator.FADE_OUT_CURVE);

         // Create menu button ObjectAnimator.
         ObjectAnimator menuButtonFadeAnimator = ObjectAnimator.ofFloat(menuButton, View.ALPHA, 1.f);
         menuButtonFadeAnimator.setInterpolator(BakedBezierInterpolator.FADE_IN_CURVE);

         // Create AnimatorSet and listeners.
         AnimatorSet set = new AnimatorSet();
         set.playTogether(badgeFadeAnimator, menuButtonFadeAnimator);
         set.setDuration(200);
         set.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
                 menuBadge.setVisibility(View.GONE);
             }

             @Override
             public void onAnimationCancel(Animator animation) {
                 // Jump to the end state if the animation is canceled.
                 menuButton.setAlpha(1.f);
                 menuBadge.setVisibility(View.GONE);
             }
         });

         return set;
     }
 }
	// Copyright 2018 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	package org.chromium.chrome.browser.toolbar;

	import android.animation.Animator;
	import android.animation.AnimatorListenerAdapter;
	import android.animation.AnimatorSet;
	import android.animation.ObjectAnimator;
	import android.content.Context;
	import android.content.res.ColorStateList;
	import android.support.annotation.DrawableRes;
	import android.support.v4.view.ViewCompat;
	import android.util.AttributeSet;
	import android.view.View;
	import android.view.animation.LinearInterpolator;
	import android.widget.FrameLayout;
	import android.widget.ImageButton;
	import android.widget.ImageView;

	import org.chromium.base.ApiCompatibilityUtils;
	import org.chromium.chrome.R;
	import org.chromium.chrome.browser.ThemeColorProvider;
	import org.chromium.chrome.browser.ThemeColorProvider.TintObserver;
	import org.chromium.chrome.browser.appmenu.AppMenuButtonHelper;
	import org.chromium.chrome.browser.omaha.UpdateMenuItemHelper;
	import org.chromium.chrome.browser.omaha.UpdateMenuItemHelper.MenuButtonState;
	import org.chromium.chrome.browser.widget.PulseDrawable;
	import org.chromium.ui.UiUtils;
	import org.chromium.ui.interpolators.BakedBezierInterpolator;

	/**
	* The overflow menu button.
	*/
	public class MenuButton extends FrameLayout implements TintObserver {
	/** The {@link ImageButton} for the menu button. */
	private ImageButton mMenuImageButton;

	/** The view for the update badge. */
	private ImageView mUpdateBadgeView;
	private boolean mUseLightDrawables;

	private AppMenuButtonHelper mAppMenuButtonHelper;

	private boolean mHighlightingMenu;
	private PulseDrawable mHighlightDrawable;

	private boolean mShowMenuBadge;
	private AnimatorSet mMenuBadgeAnimatorSet;
	private boolean mIsMenuBadgeAnimationRunning;

	/** A provider that notifies components when the theme color changes.*/
	private ThemeColorProvider mThemeColorProvider;

	public MenuButton(Context context, AttributeSet attrs) {
	super(context, attrs);
	}

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	mMenuImageButton = findViewById(R.id.menu_button);
	mUpdateBadgeView = findViewById(R.id.menu_badge);
	}

	public void setAppMenuButtonHelper(AppMenuButtonHelper appMenuButtonHelper) {
	mAppMenuButtonHelper = appMenuButtonHelper;
	mMenuImageButton.setOnTouchListener(mAppMenuButtonHelper);
	mMenuImageButton.setAccessibilityDelegate(mAppMenuButtonHelper);
	}

	public AppMenuButtonHelper getAppMenuButtonHelper() {
	return mAppMenuButtonHelper;
	}

	public View getMenuBadge() {
	return mUpdateBadgeView;
	}

	public ImageButton getImageButton() {
	return mMenuImageButton;
	}

	/**
	* Sets the update badge to visible if the update state requires it.
	*
	* @param visible Whether the update badge should be visible. Always sets visibility to GONE
	* if the update type does not require a badge.
	* TODO(crbug.com/865801): Clean this up when MenuButton and UpdateMenuItemHelper is MVCed.
	*/
	private void setUpdateBadgeVisibilityIfValidState(boolean visible) {
	MenuButtonState buttonState = UpdateMenuItemHelper.getInstance().getUiState().buttonState;

	visible &= buttonState != null;

	mUpdateBadgeView.setVisibility(visible ? View.VISIBLE : View.GONE);
	if (visible) updateImageResources();
	updateContentDescription(visible);
	}

	public void updateImageResources() {
	MenuButtonState buttonState = UpdateMenuItemHelper.getInstance().getUiState().buttonState;
	if (buttonState == null) return;
	@DrawableRes
	int drawable = mUseLightDrawables ? buttonState.lightBadgeIcon : buttonState.darkBadgeIcon;
	mUpdateBadgeView.setImageDrawable(
	ApiCompatibilityUtils.getDrawable(getResources(), drawable));
	}

	public void showAppMenuUpdateBadge(boolean animate) {
	if (mUpdateBadgeView == null) return;
	mShowMenuBadge = true;
	updateImageResources();

	setAppMenuUpdateBadgeToVisible(animate);
	}

	public void removeAppMenuUpdateBadge(boolean animate) {
	if (mUpdateBadgeView == null) return;
	boolean wasShowingMenuBadge = mShowMenuBadge;
	mShowMenuBadge = false;
	updateContentDescription(false);

	if (!animate \|\| !wasShowingMenuBadge) {
	setUpdateBadgeVisibilityIfValidState(false);
	return;
	}

	if (mIsMenuBadgeAnimationRunning && mMenuBadgeAnimatorSet != null) {
	mMenuBadgeAnimatorSet.cancel();
	}

	// Set initial states.
	mMenuImageButton.setAlpha(0.f);

	mMenuBadgeAnimatorSet = createHideUpdateBadgeAnimation(mMenuImageButton, mUpdateBadgeView);

	mMenuBadgeAnimatorSet.addListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationStart(Animator animation) {
	mIsMenuBadgeAnimationRunning = true;
	}

	@Override
	public void onAnimationEnd(Animator animation) {
	mIsMenuBadgeAnimationRunning = false;
	}

	@Override
	public void onAnimationCancel(Animator animation) {
	mIsMenuBadgeAnimationRunning = false;
	}
	});

	mMenuBadgeAnimatorSet.start();
	}

	/**
	* @return Whether the update badge is showing.
	*/
	public boolean isShowingAppMenuUpdateBadge() {
	return mUpdateBadgeView.getVisibility() == View.VISIBLE;
	}

	/**
	* Sets the update badge visibility to VISIBLE and sets the menu button image to the badged
	* bitmap.
	*/
	private void setAppMenuUpdateBadgeToVisible(boolean animate) {
	if (mUpdateBadgeView == null \|\| mMenuImageButton == null) return;
	updateContentDescription(true);
	if (!animate \|\| mIsMenuBadgeAnimationRunning) {
	setUpdateBadgeVisibilityIfValidState(true);
	return;
	}

	// Set initial states.
	mUpdateBadgeView.setAlpha(0.f);
	mUpdateBadgeView.setVisibility(View.VISIBLE);

	mMenuBadgeAnimatorSet = createShowUpdateBadgeAnimation(mMenuImageButton, mUpdateBadgeView);

	mMenuBadgeAnimatorSet.addListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationStart(Animator animation) {
	mIsMenuBadgeAnimationRunning = true;
	}

	@Override
	public void onAnimationEnd(Animator animation) {
	mIsMenuBadgeAnimationRunning = false;
	}

	@Override
	public void onAnimationCancel(Animator animation) {
	mIsMenuBadgeAnimationRunning = false;
	}
	});

	mMenuBadgeAnimatorSet.start();
	}

	/**
	* Sets the content description for the menu button.
	* @param isUpdateBadgeVisible Whether the update menu badge is visible.
	*/
	private void updateContentDescription(boolean isUpdateBadgeVisible) {
	if (isUpdateBadgeVisible) {
	MenuButtonState buttonState =
	UpdateMenuItemHelper.getInstance().getUiState().buttonState;
	assert buttonState != null : "No button state when trying to show the badge.";
	mMenuImageButton.setContentDescription(
	getResources().getString(buttonState.menuContentDescription));
	} else {
	mMenuImageButton.setContentDescription(
	getResources().getString(R.string.accessibility_toolbar_btn_menu));
	}
	}

	/**
	* Sets the menu button's background depending on whether or not we are highlighting and whether
	* or not we are using light or dark assets.
	*/
	public void setMenuButtonHighlightDrawable() {
	// Return if onFinishInflate didn't finish
	if (mMenuImageButton == null) return;

	if (mHighlightingMenu) {
	if (mHighlightDrawable == null) {
	mHighlightDrawable = PulseDrawable.createCircle(getContext());
	mHighlightDrawable.setInset(ViewCompat.getPaddingStart(mMenuImageButton),
	mMenuImageButton.getPaddingTop(),
	ViewCompat.getPaddingEnd(mMenuImageButton),
	mMenuImageButton.getPaddingBottom());
	}
	mHighlightDrawable.setUseLightPulseColor(mUseLightDrawables);
	setBackground(mHighlightDrawable);
	mHighlightDrawable.start();
	} else {
	setBackground(null);
	}
	}

	public void setMenuButtonHighlight(boolean highlight) {
	mHighlightingMenu = highlight;
	setMenuButtonHighlightDrawable();
	}

	public void setThemeColorProvider(ThemeColorProvider themeColorProvider) {
	mThemeColorProvider = themeColorProvider;
	mThemeColorProvider.addTintObserver(this);
	}

	@Override
	public void onTintChanged(ColorStateList tintList, boolean useLight) {
	ApiCompatibilityUtils.setImageTintList(mMenuImageButton, tintList);
	mUseLightDrawables = useLight;
	updateImageResources();
	}

	public void destroy() {
	if (mThemeColorProvider != null) {
	mThemeColorProvider.removeTintObserver(this);
	mThemeColorProvider = null;
	}
	UiUtils.removeViewFromParent(this);
	}

	/**
	* Creates an {@link AnimatorSet} for showing the update badge that is displayed on top
	* of the app menu button.
	*
	* @param menuButton The {@link View} containing the app menu button.
	* @param menuBadge The {@link View} containing the update badge.
	* @return An {@link AnimatorSet} to run when showing the update badge.
	*/
	private static AnimatorSet createShowUpdateBadgeAnimation(
	final View menuButton, final View menuBadge) {
	// Create badge ObjectAnimators.
	ObjectAnimator badgeFadeAnimator = ObjectAnimator.ofFloat(menuBadge, View.ALPHA, 1.f);
	badgeFadeAnimator.setInterpolator(BakedBezierInterpolator.FADE_IN_CURVE);

	int pixelTranslation = menuBadge.getResources().getDimensionPixelSize(
	R.dimen.menu_badge_translation_y_distance);
	ObjectAnimator badgeTranslateYAnimator =
	ObjectAnimator.ofFloat(menuBadge, View.TRANSLATION_Y, pixelTranslation, 0.f);
	badgeTranslateYAnimator.setInterpolator(BakedBezierInterpolator.TRANSFORM_CURVE);

	// Create menu button ObjectAnimator.
	ObjectAnimator menuButtonFadeAnimator = ObjectAnimator.ofFloat(menuButton, View.ALPHA, 0.f);
	menuButtonFadeAnimator.setInterpolator(new LinearInterpolator());

	// Create AnimatorSet and listeners.
	AnimatorSet set = new AnimatorSet();
	set.playTogether(badgeFadeAnimator, badgeTranslateYAnimator, menuButtonFadeAnimator);
	set.setDuration(350);
	set.addListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationEnd(Animator animation) {
	// Make sure the menu button is visible again.
	menuButton.setAlpha(1.f);
	}

	@Override
	public void onAnimationCancel(Animator animation) {
	// Jump to the end state if the animation is canceled.
	menuBadge.setAlpha(1.f);
	menuBadge.setTranslationY(0.f);
	menuButton.setAlpha(1.f);
	}
	});

	return set;
	}

	/**
	* Creates an {@link AnimatorSet} for hiding the update badge that is displayed on top
	* of the app menu button.
	*
	* @param menuButton The {@link View} containing the app menu button.
	* @param menuBadge The {@link View} containing the update badge.
	* @return An {@link AnimatorSet} to run when hiding the update badge.
	*/
	private static AnimatorSet createHideUpdateBadgeAnimation(
	final View menuButton, final View menuBadge) {
	// Create badge ObjectAnimator.
	ObjectAnimator badgeFadeAnimator = ObjectAnimator.ofFloat(menuBadge, View.ALPHA, 0.f);
	badgeFadeAnimator.setInterpolator(BakedBezierInterpolator.FADE_OUT_CURVE);

	// Create menu button ObjectAnimator.
	ObjectAnimator menuButtonFadeAnimator = ObjectAnimator.ofFloat(menuButton, View.ALPHA, 1.f);
	menuButtonFadeAnimator.setInterpolator(BakedBezierInterpolator.FADE_IN_CURVE);

	// Create AnimatorSet and listeners.
	AnimatorSet set = new AnimatorSet();
	set.playTogether(badgeFadeAnimator, menuButtonFadeAnimator);
	set.setDuration(200);
	set.addListener(new AnimatorListenerAdapter() {
	@Override
	public void onAnimationEnd(Animator animation) {
	menuBadge.setVisibility(View.GONE);
	}

	@Override
	public void onAnimationCancel(Animator animation) {
	// Jump to the end state if the animation is canceled.
	menuButton.setAlpha(1.f);
	menuBadge.setVisibility(View.GONE);
	}
	});

	return set;
	}
	}