Android examples for android.view.animation:Fade Animation
Create animation to cross Fade Views
/*//w w w . j av a 2s . co m * Copyright (C) 2014 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 */ package com.geniusgithub.contact.util; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.ValueAnimator; import android.view.View; import android.view.ViewPropertyAnimator; import android.view.animation.Interpolator; import android.view.animation.PathInterpolator; public class AnimUtils { public static final int DEFAULT_DURATION = -1; public static final int NO_DELAY = 0; public static final Interpolator EASE_IN = new PathInterpolator(0.0f, 0.0f, 0.2f, 1.0f); public static final Interpolator EASE_OUT = new PathInterpolator(0.4f, 0.0f, 1.0f, 1.0f); public static final Interpolator EASE_OUT_EASE_IN = new PathInterpolator( 0.4f, 0, 0.2f, 1); public static class AnimationCallback { public void onAnimationEnd() { } public void onAnimationCancel() { } } public static void crossFadeViews(View fadeIn, View fadeOut, int duration) { fadeIn(fadeIn, duration); fadeOut(fadeOut, duration); } public static void fadeOut(View fadeOut, int duration) { fadeOut(fadeOut, duration, null); } public static void fadeOut(final View fadeOut, int durationMs, final AnimationCallback callback) { fadeOut.setAlpha(1); final ViewPropertyAnimator animator = fadeOut.animate(); animator.cancel(); animator.alpha(0).withLayer() .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { fadeOut.setVisibility(View.GONE); if (callback != null) { callback.onAnimationEnd(); } } @Override public void onAnimationCancel(Animator animation) { fadeOut.setVisibility(View.GONE); fadeOut.setAlpha(0); if (callback != null) { callback.onAnimationCancel(); } } }); if (durationMs != DEFAULT_DURATION) { animator.setDuration(durationMs); } animator.start(); } public static void fadeIn(View fadeIn, int durationMs) { fadeIn(fadeIn, durationMs, NO_DELAY, null); } public static void fadeIn(final View fadeIn, int durationMs, int delay, final AnimationCallback callback) { fadeIn.setAlpha(0); final ViewPropertyAnimator animator = fadeIn.animate(); animator.cancel(); animator.setStartDelay(delay); animator.alpha(1).withLayer() .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { fadeIn.setVisibility(View.VISIBLE); } @Override public void onAnimationCancel(Animator animation) { fadeIn.setAlpha(1); if (callback != null) { callback.onAnimationCancel(); } } @Override public void onAnimationEnd(Animator animation) { if (callback != null) { callback.onAnimationEnd(); } } }); if (durationMs != DEFAULT_DURATION) { animator.setDuration(durationMs); } animator.start(); } /** * Scales in the view from scale of 0 to actual dimensions. * @param view The view to scale. * @param durationMs The duration of the scaling in milliseconds. * @param startDelayMs The delay to applying the scaling in milliseconds. */ public static void scaleIn(final View view, int durationMs, int startDelayMs) { AnimatorListenerAdapter listener = (new AnimatorListenerAdapter() { @Override public void onAnimationStart(Animator animation) { view.setVisibility(View.VISIBLE); } @Override public void onAnimationCancel(Animator animation) { view.setScaleX(1); view.setScaleY(1); } }); scaleInternal(view, 0 /* startScaleValue */, 1 /* endScaleValue */, durationMs, startDelayMs, listener, EASE_IN); } /** * Scales out the view from actual dimensions to 0. * @param view The view to scale. * @param durationMs The duration of the scaling in milliseconds. */ public static void scaleOut(final View view, int durationMs) { AnimatorListenerAdapter listener = new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { view.setVisibility(View.INVISIBLE); } @Override public void onAnimationCancel(Animator animation) { view.setVisibility(View.INVISIBLE); view.setScaleX(0); view.setScaleY(0); } }; scaleInternal(view, 1 /* startScaleValue */, 0 /* endScaleValue */, durationMs, NO_DELAY, listener, EASE_OUT); } private static void scaleInternal(final View view, int startScaleValue, int endScaleValue, int durationMs, int startDelay, AnimatorListenerAdapter listener, Interpolator interpolator) { view.setScaleX(startScaleValue); view.setScaleY(startScaleValue); final ViewPropertyAnimator animator = view.animate(); animator.cancel(); animator.setInterpolator(interpolator).scaleX(endScaleValue) .scaleY(endScaleValue).setListener(listener).withLayer(); if (durationMs != DEFAULT_DURATION) { animator.setDuration(durationMs); } animator.setStartDelay(startDelay); animator.start(); } /** * Animates a view to the new specified dimensions. * @param view The view to change the dimensions of. * @param newWidth The new width of the view. * @param newHeight The new height of the view. */ public static void changeDimensions(final View view, final int newWidth, final int newHeight) { ValueAnimator animator = ValueAnimator.ofFloat(0f, 1f); final int oldWidth = view.getWidth(); final int oldHeight = view.getHeight(); final int deltaWidth = newWidth - oldWidth; final int deltaHeight = newHeight - oldHeight; animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() { @Override public void onAnimationUpdate(ValueAnimator animator) { Float value = (Float) animator.getAnimatedValue(); view.getLayoutParams().width = (int) (value * deltaWidth + oldWidth); view.getLayoutParams().height = (int) (value * deltaHeight + oldHeight); view.requestLayout(); } }); animator.start(); } }