AnimationUtils.java

package com.jdroid.android.animation;

import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.os.Build;
import android.view.View;
import android.view.ViewAnimationUtils;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.AnimationSet;
import android.view.animation.LayoutAnimationController;
import android.view.animation.TranslateAnimation;

public final class AnimationUtils {
	
	/**
	 * Private constructor to avoid instantiation
	 */
	private AnimationUtils() {
		// Do nothing...
	}
	
	public static void makeViewGroupAnimation(ViewGroup viewGroup) {
		AnimationSet set = new AnimationSet(true);
		
		Animation animation = new AlphaAnimation(0.0f, 1.0f);
		animation.setDuration(50);
		set.addAnimation(animation);
		
		animation = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.0f, Animation.RELATIVE_TO_SELF, 0.0f,
				Animation.RELATIVE_TO_SELF, -1.0f, Animation.RELATIVE_TO_SELF, 0.0f);
		animation.setDuration(150);
		set.addAnimation(animation);
		
		LayoutAnimationController controller = new LayoutAnimationController(set, 0.5f);
		viewGroup.setLayoutAnimation(controller);
	}
	
	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
	public static void showWithReveal(View view) {
		
		// get the center for the clipping circle
		int cx = (view.getLeft() + view.getRight()) / 2;
		int cy = (view.getTop() + view.getBottom()) / 2;
		
		// get the final radius for the clipping circle
		int finalRadius = Math.max(view.getWidth(), view.getHeight());
		
		// create the animator for this view (the start radius is zero)
		Animator anim = ViewAnimationUtils.createCircularReveal(view, cx, cy, 0, finalRadius);
		
		// make the view visible and start the animation
		view.setVisibility(View.VISIBLE);
		anim.setDuration(1000);
		anim.start();
	}
	
	@TargetApi(Build.VERSION_CODES.LOLLIPOP)
	public static void hideWithReveal(final View view) {

		// get the center for the clipping circle
		int cx = (view.getLeft() + view.getRight()) / 2;
		int cy = (view.getTop() + view.getBottom()) / 2;
		
		// get the initial radius for the clipping circle
		int initialRadius = view.getWidth();
		
		// create the animation (the final radius is zero)
		Animator anim = ViewAnimationUtils.createCircularReveal(view, cx, cy, initialRadius, 0);
		
		// make the view invisible when the animation is done
		anim.addListener(new AnimatorListenerAdapter() {
			@Override
			public void onAnimationEnd(Animator animation) {
				super.onAnimationEnd(animation);
				view.setVisibility(View.INVISIBLE);
			}
		});
		
		anim.setDuration(1000);
		
		// start the animation
		anim.start();
	}
}