android AnimationDrawable类实现动画效果

布局文件xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:background="#000000"    tools:context=".MainActivity" >    <ImageView        android:id="@+id/imageView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        /></RelativeLayout>

MainActivity.java

package com.playgif;import android.app.Activity;import android.graphics.drawable.AnimationDrawable;import android.os.Bundle;import android.widget.ImageView;public class MainActivity extends Activity {    ImageView imageView = null;    AnimationDrawable animation = null;;        @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        imageView = (ImageView)findViewById(R.id.imageView1);        imageView.setBackgroundResource(R.drawable.img_list);        animation = (AnimationDrawable)imageView.getBackground();        //是否仅启动一次         animation.setOneShot(false);          if(animation.isRunning())        {              animation.stop();//停止           }          animation.start();//启动             }}

img_list.xml

<?xml version="1.0" encoding="utf-8"?><animation-list xmlns:android="http://schemas.android.com/apk/res/android" >    <item android:drawable="@drawable/a1" android:duration="100" />       <item android:drawable="@drawable/a2" android:duration="100" />       <item android:drawable="@drawable/a3" android:duration="100" />      <item android:drawable="@drawable/a4" android:duration="100" />      <item android:drawable="@drawable/a5" android:duration="100" />      <item android:drawable="@drawable/a6" android:duration="100" />     <item android:drawable="@drawable/a7" android:duration="100" />       <item android:drawable="@drawable/a8" android:duration="100" />       <item android:drawable="@drawable/a9" android:duration="100" />      <item android:drawable="@drawable/a10" android:duration="100" />      <item android:drawable="@drawable/a11" android:duration="100" />      <item android:drawable="@drawable/a12" android:duration="100" /> </animation-list>

android:duration指的是延迟，将要轮询播放的图片依次加入list列表。

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