Java tutorial
//package com.java2s; /* * Copyright (C) 2009 The Android Open Source Project * * 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.AlphaAnimation; import android.view.animation.Animation; public class Main { public static void fadeIn(View view) { if (view.getVisibility() == View.VISIBLE) return; view.setVisibility(View.VISIBLE); Animation animation = new AlphaAnimation(0F, 1F); animation.setDuration(400); view.startAnimation(animation); } }