Android属性动画基础(2)

点击按钮，实现弹出多个按钮

package com.twac.animationtest3;

import java.util.ArrayList;
import java.util.List;

import android.animation.ObjectAnimator;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.AccelerateDecelerateInterpolator;
import android.view.animation.BounceInterpolator;
import android.widget.ImageView;

public class MainActivity extends Activity implements OnClickListener {
	private ImageView mImageView;
	private int[] res = { R.id.img_main, R.id.img_0, R.id.img_1, R.id.img_2,
			R.id.img_3, R.id.img_4, R.id.img_5, R.id.img_6, R.id.img_7 };
	private List<ImageView> list = new ArrayList<ImageView>();
	private boolean flag = true;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		for (int i = 0; i < res.length; i++) {
			mImageView = (ImageView) findViewById(res[i]);
			mImageView.setOnClickListener(this);
			list.add(mImageView);
		}
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.img_main:
			if (flag) {
				startAnim();
			} else {
				closeAnim();
			}
//			break;
		default:
			break;
		}
	}

	private void closeAnim() {
		for (int i = 1; i < res.length; i++) {
			ObjectAnimator animator = ObjectAnimator.ofFloat(list.get(i),
					"TranslationY", 200F * i,0f);
			animator.setDuration(1000);
			animator.setStartDelay(i*500);
			animator.setInterpolator(new AccelerateDecelerateInterpolator());
			animator.start();
			flag = true;
		}
	}

	private void startAnim() {
		for (int i = 1; i < res.length; i++) {
			ObjectAnimator animator = ObjectAnimator.ofFloat(list.get(i),
					"TranslationY", 0f, 200F * i);
			animator.setDuration(1000);
			animator.setStartDelay(i*800);
			animator.setInterpolator(new BounceInterpolator());
			animator.start();
			flag = false;
		}
	}
}