<animation-list 
xmlns:android="http://schemas.android.com/apk/res/android" 
   android:oneshot="false">
      <item android:drawable="@drawable/g1" 
         android:duration="200" />
      <item android:drawable="@drawable/g2" 
         android:duration="200" />
      <item android:drawable="@drawable/g3" 、
         android:duration="200" />
    </animation-list>

ImageView iv = (ImageView) findViewById(R.id.iv);
    //把动画文件设置为imageView的背景
    iv.setBackgroundResource(R.drawable.animations);
    AnimationDrawable ad = (AnimationDrawable)
    iv.getBackground();
    //播放动画    
    ad.start();

//创建为位移动画对象，设置动画的初始位置和结束位置
TranslateAnimation ta = new TranslateAnimation(10, 150, 20, 140);

 TranslateAnimation ta = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 2, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 2);

    //设置动画持续时间
    ta.setDuration(2000);
    //动画重复播放的次数
    ta.setRepeatCount(1);
    //动画重复播放的模式
    ta.setRepeatMode(Animation.REVERSE);
    //动画播放完毕后，组件停留在动画结束的位置上
    ta.setFillAfter(true);
    //播放动画
    iv.startAnimation(ta);

ScaleAnimation sa = new ScaleAnimation(0.1f, 4, 0.1f, 4);

ScaleAnimation sa = new ScaleAnimation(0.1f, 4, 0.1f, 4, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);

  AlphaAnimation aa = new AlphaAnimation(0, 0.5f);

RotateAnimation ra = new RotateAnimation(20, 360);

RotateAnimation ra = new RotateAnimation(20, 360, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);

 //创建动画集合
    AnimationSet set = new AnimationSet(false);
    //往集合中添加动画
    set.addAnimation(aa);
    set.addAnimation(sa);
    set.addAnimation(ra);
    iv.startAnimation(set);

//具有get、set方法的成员变量就称为属性
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "translationX", 0, 100) ;

ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "scaleY", 0.1f, 2);

ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "alpha", 0.1f, 1);

ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "rotation", 20, 270);

ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "rotationY", 20, 180);

ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "translationX", 0, 70, 30, 100) ;

     //创建动画师集合
    AnimatorSet set = new AnimatorSet();
    //设置要播放动画的组件
    set.setTarget(bt);
    //所有动画有先后顺序的播放
    //set.playSequentially(oa, oa2, oa3, oa4);
    //所有动画一起播放
    set.playTogether(oa, oa2, oa3, oa4);
    set.start();