<?xml version="1.0" encoding="utf-8"?>
<!-- 定义一个线性布局容器 -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/root"android:orientation="vertical"android:layout_width="fill_parent"android:layout_height="fill_parent">
</LinearLayout>

 1 public class MainActivity extends Activity
 2 {
 3     //定义一个访问图片的数组
 4     int[] images = new int[]{
 5         R.drawable.java,
 6         R.drawable.ee,
 7         R.drawable.classic,
 8         R.drawable.ajax,
 9         R.drawable.xml,
10     };
11     int currentImg = 0;
12     @Override
13     public void onCreate(Bundle savedInstanceState)
14     {
15         super.onCreate(savedInstanceState);
16         setContentView(R.layout.main);
17         //获取LinearLayout布局容器
18         LinearLayout main = (LinearLayout)findViewById(R.id.root);
19         //程序创建ImageView组件
20         final ImageView image = new ImageView(this);
21         //将ImageView组件添加到LinearLayout布局容器中
22         main.addView(image);
23         //初始化时显示第一张图片
24         image.setImageResource(images[0]);
25         image.setOnClickListener(new OnClickListener()
26         {
27             @Override
28             public void onClick(View v)
29             {
30                 if (currentImg >= 4)
31                 {
32                     currentImg = -1;
33                 }
34                 //改变ImageView里显示的图片
35                 image.setImageResource(images[++currentImg]);
36             }
37         });
38     }
39 }