Java tutorial
//package com.java2s; //License from project: Open Source License import android.animation.Animator; import android.animation.ObjectAnimator; import android.view.View; public class Main { private static int defaultDuration = 500; public static void animAlpha(View view, float fromAlpha, float toAlpha) { animAlpha(view, fromAlpha, toAlpha, defaultDuration); } public static void animAlpha(View view, float fromAlpha, float toAlpha, int duration) { ObjectAnimator.ofFloat(view, "alpha", fromAlpha, toAlpha).setDuration(duration).start(); } public static void animAlpha(View view, float fromAlpha, float toAlpha, int duration, int delay) { Animator anim = ObjectAnimator.ofFloat(view, "alpha", fromAlpha, toAlpha).setDuration(duration); anim.setStartDelay(delay); anim.start(); } }