content: package com.rsen.github.easyandroidanimations;
  
  import android.animation.Animator;
  import android.animation.AnimatorListenerAdapter;
  import android.animation.AnimatorSet;
  import android.animation.ObjectAnimator;
  import android.animation.TimeInterpolator;
  import android.animation.ValueAnimator;
  import android.view.View;
  import android.view.ViewGroup;
  import android.view.animation.AccelerateDecelerateInterpolator;
  
  /**
   * This animation causes the view to slide out to the borders of the screen. On
   * animation end, the view is restored to its original state and is set to
   * <code>View.INVISIBLE</code>.
   * 
   * @author SiYao
   * 
   */
  public class SlideOutAnimation extends Animation implements Combinable {
  
  	int direction;
  	TimeInterpolator interpolator;
  	long duration;
  	AnimationListener listener;
  	ValueAnimator slideAnim;
  
  	/**
  	 * This animation causes the view to slide out to the borders of the screen.
  	 * On animation end, the view is restored to its original state and is set
  	 * to <code>View.INVISIBLE</code>.
  	 * 
  	 * @param view
  	 *            The view to be animated.
  	 */
  	public SlideOutAnimation(View view) {
  		this.view = view;
  		direction = DIRECTION_LEFT;
  		interpolator = new AccelerateDecelerateInterpolator();
  		duration = DURATION_LONG;
  		listener = null;
  	}
  
  	@Override
  	public void animate() {
  		getAnimatorSet().start();
  	}
  
  	@Override
  	public AnimatorSet getAnimatorSet() {
  		ViewGroup parentView = (ViewGroup) view.getParent(), rootView = (ViewGroup) view
  				.getRootView();
  		while (!parentView.equals(rootView)) {
  			parentView.setClipChildren(false);
  			parentView = (ViewGroup) parentView.getParent();
  		}
  		rootView.setClipChildren(false);
  
  		final int[] locationView = new int[2];
  		view.getLocationOnScreen(locationView);
  
  		switch (direction) {
  		case DIRECTION_LEFT:
  			slideAnim = ObjectAnimator.ofFloat(view, View.X, -locationView[0]
  					- view.getWidth());
  			break;
  		case DIRECTION_RIGHT:
  			slideAnim = ObjectAnimator.ofFloat(view, View.X,
  					rootView.getRight());
  			break;
  		case DIRECTION_UP:
  			slideAnim = ObjectAnimator.ofFloat(view, View.Y, -locationView[1]
  					- view.getHeight());
  			break;
  		case DIRECTION_DOWN:
  			slideAnim = ObjectAnimator.ofFloat(view, View.Y,
  					rootView.getBottom());
  			break;
  		default:
  			break;
  		}
  
  		AnimatorSet slideSet = new AnimatorSet();
  		slideSet.play(slideAnim);
  		slideSet.setInterpolator(interpolator);
  		slideSet.setDuration(duration);
  		slideSet.addListener(new AnimatorListenerAdapter() {
  
  			@Override
  			public void onAnimationEnd(Animator animation) {
  				view.setVisibility(View.INVISIBLE);
  				slideAnim.reverse();
  				if (getListener() != null) {
  					getListener().onAnimationEnd(SlideOutAnimation.this);
  				}
  			}
  		});
  		return slideSet;
  	}
  
  	/**
  	 * The available directions to slide in from are <code>DIRECTION_LEFT</code>
  	 * , <code>DIRECTION_RIGHT</code>, <code>DIRECTION_TOP</code> and
  	 * <code>DIRECTION_BOTTOM</code>.
  	 * 
  	 * @return The direction to slide the view out to.
  	 * @see Animation
  	 */
  	public int getDirection() {
  		return direction;
  	}
  
  	/**
  	 * The available directions to slide in from are <code>DIRECTION_LEFT</code>
  	 * , <code>DIRECTION_RIGHT</code>, <code>DIRECTION_TOP</code> and
  	 * <code>DIRECTION_BOTTOM</code>.
  	 * 
  	 * @param direction
  	 *            The direction to set to slide the view out to.
  	 * @return This object, allowing calls to methods in this class to be
  	 *         chained.
  	 * @see Animation
  	 */
  	public SlideOutAnimation setDirection(int direction) {
  		this.direction = direction;
  		return this;
  	}
  
  	/**
  	 * @return The interpolator of the entire animation.
  	 */
  	public TimeInterpolator getInterpolator() {
  		return interpolator;
  	}
  
  	/**
  	 * @param interpolator
  	 *            The interpolator of the entire animation to set.
  	 */
  	public SlideOutAnimation setInterpolator(TimeInterpolator interpolator) {
  		this.interpolator = interpolator;
  		return this;
  	}
  
  	/**
  	 * @return The duration of the entire animation.
  	 */
  	public long getDuration() {
  		return duration;
  	}
  
  	/**
  	 * @param duration
  	 *            The duration of the entire animation to set.
  	 * @return This object, allowing calls to methods in this class to be
  	 *         chained.
  	 */
  	public SlideOutAnimation setDuration(long duration) {
  		this.duration = duration;
  		return this;
  	}
  
  	/**
  	 * @return The listener for the end of the animation.
  	 */
  	public AnimationListener getListener() {
  		return listener;
  	}
  
  	/**
  	 * @param listener
  	 *            The listener to set for the end of the animation.
  	 * @return This object, allowing calls to methods in this class to be
  	 *         chained.
  	 */
  	public SlideOutAnimation setListener(AnimationListener listener) {
  		this.listener = listener;
  		return this;
  	}
  
  }
  