Java tutorial
//package com.java2s; /* * Copyright (C) 2015 Federico Iosue (federico.iosue@gmail.com) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import android.view.View; import android.view.animation.AccelerateInterpolator; import android.view.animation.Animation; import android.view.animation.TranslateAnimation; public class Main { public static void expandOrCollapse(final View v, boolean expand) { TranslateAnimation anim; if (expand) { anim = new TranslateAnimation(0.0f, 0.0f, -v.getHeight(), 0.0f); v.setVisibility(View.VISIBLE); } else { anim = new TranslateAnimation(0.0f, 0.0f, 0.0f, -v.getHeight()); Animation.AnimationListener collapselistener = new Animation.AnimationListener() { @Override public void onAnimationStart(Animation animation) { // Useless } @Override public void onAnimationRepeat(Animation animation) { // Useless } @Override public void onAnimationEnd(Animation animation) { v.setVisibility(View.GONE); } }; anim.setAnimationListener(collapselistener); } anim.setDuration(300); anim.setInterpolator(new AccelerateInterpolator(0.5f)); v.startAnimation(anim); } }