TiltEffect.java

package python.listview.jazzy.effects;

import python.listview.JazzyEffect;
import python.listview.JazzyHelper;
import android.view.View;

import com.nineoldandroids.view.ViewHelper;
import com.nineoldandroids.view.ViewPropertyAnimator;

public class TiltEffect implements JazzyEffect {

	private static final float INITIAL_SCALE_FACTOR = 0.7f;

	@Override
	public void initView(View item, int position, int scrollDirection) {
		ViewHelper.setPivotX(item, item.getWidth() / 2);
		ViewHelper.setPivotY(item, item.getHeight() / 2);
		ViewHelper.setScaleX(item, INITIAL_SCALE_FACTOR);
		ViewHelper.setScaleY(item, INITIAL_SCALE_FACTOR);
		ViewHelper
				.setTranslationY(item, item.getHeight() / 2 * scrollDirection);
		ViewHelper.setAlpha(item, JazzyHelper.OPAQUE / 2);
	}

	@Override
	public void setupAnimation(View item, int position, int scrollDirection,
			ViewPropertyAnimator animator) {
		animator.translationYBy(-item.getHeight() / 2 * scrollDirection)
				.scaleX(1).scaleY(1).alpha(JazzyHelper.OPAQUE);
	}

}