Android开发之背景动画简单实现方法

<?xml version="1.0" encoding="utf-8"? 
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"  
  <item
    android:drawable="@drawable/v_anim1"
    android:duration="300" 
  </item 
  <item
    android:drawable="@drawable/v_anim2"
    android:duration="300" 
  </item 
  <item
    android:drawable="@drawable/v_anim3"
    android:duration="300" 
  </item 
</animation-list 

View viewanim = view.findViewById(R.id.id_recorder_anim);
viewanim.setBackgroundResource(R.drawable.play);
AnimationDrawable drawable = (AnimationDrawable) viewanim.getBackground();
drawable.start();

if (drawable.isRunning()) {
  drawable.stop();
}