Java tutorial
//package com.java2s; /** * Copyright (c) 2015-present, Facebook, Inc. All rights reserved. * <p> * You are hereby granted a non-exclusive, worldwide, royalty-free license to use, * copy, modify, and distribute this software in source code or binary form for use * in connection with the web services and APIs provided by Facebook. * <p> * As with any software that integrates with the Facebook platform, your use of * this software is subject to the Facebook Developer Principles and Policies * [http://developers.facebook.com/policy/]. This copyright notice shall be * included in all copies or substantial portions of the software. * <p> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.view.View; public class Main { private static final long SHORT_ANIMATION_DURATION = 400; /** * Animate a transition between two views * * @param viewToFadeOut * @param viewToFadeIn * @param viewToFadeOutVisibilityState */ public static void crossFade(final View viewToFadeOut, final View viewToFadeIn, final int viewToFadeOutVisibilityState) { viewToFadeIn.setAlpha(0f); viewToFadeIn.setVisibility(View.VISIBLE); viewToFadeIn.animate().alpha(1f).setDuration(SHORT_ANIMATION_DURATION).setListener(null); viewToFadeOut.animate().alpha(0f).setDuration(SHORT_ANIMATION_DURATION) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { viewToFadeOut.setVisibility(viewToFadeOutVisibilityState); } }); } }