Android Open Source - pulltorefresh_library_with_Indexable_listView Alpha Animator

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License

The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2014 Naver Business Platform Corp.
 * //w  w  w. j  a v a2s .com
 * 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.handmark.pulltorefresh.library;

import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation.AnimationListener;
/**
 * AlphaAnimation Helper
 * Just supports fade-in and fade-out
 * @author Wonjun Kim
 *
 */
class AlphaAnimator {
  
  public static void fadein(View view, int duration) {
    fadein(view, duration, null);
  }
  public static void fadein(View view, int duration, AnimationListener listener) {
    animate(view, duration, listener, 0.0f, 1.0f);
  }
  
  public static void fadeout(View view, int duration) {
    fadeout(view, duration, null);
  }
  
  public static void fadeout(View view, int duration, AnimationListener listener) {
    animate(view, duration, listener, 1.0f, 0.0f);
  }
  
  private static void animate(View view, int duration, AnimationListener listener, float fromAlpha, float targetAlpha) {
    // Create new animation
    AlphaAnimation newAnimation = new AlphaAnimation(fromAlpha, targetAlpha);
    
    newAnimation.setDuration(duration);
    // Force fillAfter flag to be true
    newAnimation.setFillAfter(true);
    newAnimation.setAnimationListener(listener);
    // Start fading
    view.startAnimation(newAnimation);
    
  }
}

Java Source Code List

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