MWAnimUtil.java

package com.android.smap.utils;

import android.animation.Animator.AnimatorListener;
import android.animation.ObjectAnimator;
import android.os.Build;
import android.view.View;
import android.view.animation.DecelerateInterpolator;

public class MWAnimUtil {

	public static void pulseDown(View view) {
		pulseDown(view, new TransitionBundle());
	}

	public static void pulseDown(View view, TransitionBundle config) {
		if (supportsHoneycomb()) {
			view.setPivotY(1.0f);
			ObjectAnimator a = ObjectAnimator.ofFloat(view, "scaleY", 1.15f,
					1.0f);
			a.setInterpolator(new DecelerateInterpolator());
			startWithConfig(a, config);
		}
	}

	public static void fadeIn(View view) {
		fadeIn(view, new TransitionBundle());
	}

	public static void fadeIn(View view, TransitionBundle c) {
		if (supportsHoneycomb()) {
			ObjectAnimator a = ObjectAnimator
					.ofFloat(view, "alpha", 0.0f, 1.0f);
			a.setInterpolator(new DecelerateInterpolator());
			startWithConfig(a, c);
		}
	}

	private static void startWithConfig(ObjectAnimator a, TransitionBundle tb) {
		a.setDuration(tb.getDuration());

		if (tb.getListener() != null) {
			a.addListener(tb.getListener());
		}

		a.start();

		if (tb.isReversed()) {
			a.reverse();
		}
	}

	private static boolean supportsHoneycomb() {
		return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
	}

	public static class TransitionBundle {

		private static final int	DEFAULT_ANIM_DURATION	= 1500;
		private long				mDuration;
		private boolean				mReverse;
		private AnimatorListener	mListener;

		public TransitionBundle() {
			mDuration = DEFAULT_ANIM_DURATION;
			mReverse = false;
		}

		public void setDuration(long duration) {
			mDuration = duration;
		}

		public void setReversed(boolean reverse) {
			mReverse = reverse;
		}

		public void setListener(AnimatorListener listener) {
			mListener = listener;
		}

		public long getDuration() {
			return mDuration;
		}

		public boolean isReversed() {
			return mReverse;
		}

		public AnimatorListener getListener() {
			return mListener;
		}
	}

	// percent should be 0.7 for 70% growth of bar.
	public static void growRight(View view, float percent) {
		growRight(view, percent, new TransitionBundle());
	}

	public static void growRight(View view, float percent, TransitionBundle c) {

		if (supportsHoneycomb()) {
			if (percent > 1.0f) {
				percent = 1.0f;
			}
			view.setPivotX(0);
			ObjectAnimator a = ObjectAnimator
					.ofFloat(view, "scaleX", 0.0f, percent);
			a.setInterpolator(new DecelerateInterpolator());
			startWithConfig(a, c);
		}
	}

}