Java tutorial
//package com.java2s; /* * Copyright (C) 2016. BoBoMEe(wbwjx115@gmail.com) * * 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. */ import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.ObjectAnimator; import android.view.View; public class Main { private static final int BUBBLE_ANIMATION_DURATION = 300; public static ObjectAnimator alpha_to(final View target) { ObjectAnimator objectAnimator = null; if (null != target) { objectAnimator = ObjectAnimator.ofFloat(target, View.ALPHA, 1f, 0f) .setDuration(BUBBLE_ANIMATION_DURATION); objectAnimator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationCancel(Animator animation) { super.onAnimationCancel(animation); target.setVisibility(View.GONE); } @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); target.setVisibility(View.GONE); } }); objectAnimator.start(); } return objectAnimator; } }