Java tutorial
//package com.java2s; /* * Copyright (C) 2016 Marco Hernaiz Cao * * 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.view.View; import android.view.animation.AccelerateInterpolator; import android.view.animation.AlphaAnimation; import android.view.animation.Animation; import android.view.animation.Animation.AnimationListener; public class Main { public static final int FADE_DURATION = 200; public static void startFadeInAnimationOn(final View container) { startFadeInAnimationOn(container, false); } public static void startFadeInAnimationOn(final View container, boolean forceFade) { if (forceFade || container.getVisibility() != View.VISIBLE) { Animation animation = getFadeInAnimation(FADE_DURATION); animation.setAnimationListener(new AnimationListener() { @Override public void onAnimationStart(Animation animation) { container.setVisibility(View.VISIBLE); } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationEnd(Animation animation) { } }); container.startAnimation(animation); } } public static Animation getFadeInAnimation(int durationInMilliseconds) { Animation fadeIn = new AlphaAnimation(0, 1); fadeIn.setFillAfter(true); fadeIn.setInterpolator(new AccelerateInterpolator()); fadeIn.setDuration(durationInMilliseconds); return fadeIn; } }