（四十七）属性动画Demo-创新互联

1、程序结构

2、MainActivity.java程序

package com.example.objectanimator1;

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

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

public class MainActivity extends Activity implements OnClickListener {

private int[] ivId = { R.id.iv_a, R.id.iv_b, R.id.iv_c, R.id.iv_d,
            R.id.iv_e, R.id.iv_f, R.id.iv_g, R.id.iv_h };

private List imageInfos = new ArrayList();

private Boolean flag = true;

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

    @Override
public void onClick(View v) {
// TODO Auto-generated method stub   switch (v.getId()) {
case R.id.iv_a:
if (flag) {
                startAnima();
                flag= false;
            }else {
                closeAnima();
                flag= true;
            }

break;

default:
            Toast.makeText(MainActivity.this, "clicked:"+ v.getId() , 0).show();
break;
        }
    }

private void startAnima() {
// TODO Auto-generated method stub   for (int i = 0; i < ivId.length; i++) {
            ObjectAnimator oa= ObjectAnimator.ofFloat(imageInfos.get(i),
"translationY", 0, i * 100);
            oa.setInterpolator(new BounceInterpolator());
            oa.setDuration(1000);
            oa.setStartDelay(300);
            oa.start();
        }
    }

private void closeAnima() {
// TODO Auto-generated method stub   for (int i = 0; i < ivId.length; i++) {
            ObjectAnimator oa= ObjectAnimator.ofFloat(imageInfos.get(i),
"translationY", i * 100, 0);
            oa.setInterpolator(new AccelerateInterpolator());
            oa.setDuration(1000);
            oa.setStartDelay(300);
            oa.start();
        }
    }
}

2、activity_main.xml的代码