//透明度动画

AlphaAnimation aa = (AlphaAnimation) AnimationUtils.loadAnimation(MainActivity.this,R.anim.myalpha);

//位移动画

TranslateAnimation ta = new TranslateAnimation(

                        Animation.RELATIVE_TO_SELF, 0.5f,

                        Animation.RELATIVE_TO_SELF, 1f,

                        Animation.RELATIVE_TO_SELF, 0.5f,

                        Animation.RELATIVE_TO_SELF, 1f);

//旋转动画

RotateAnimation ra = new RotateAnimation(0, 360,

                        iv.getPivotX(), iv.getPivotY());

//放缩动画

ScaleAnimation sa = new ScaleAnimation(

                        Animation.RELATIVE_TO_SELF, 2f,

                        Animation.RELATIVE_TO_SELF, 2f);

<alpha xmlns:android="http://schemas.android.com/apk/res/android"

    android:fromAlpha="1"

    android:toAlpha="0.5"

    android:repeatCount="1"

    android:repeatMode="reverse"

    android:duration="3000"

     >

</alpha>