简单图片浏览器

public class MixView extends Activity
{
    //定义一个访问图片的数组
    int[] images = new int[]{
        R.drawable.java,
        R.drawable.ee,
        R.drawable.classic,
        R.drawable.ajax,
        R.drawable.xml,
    };
    int currentImg = 0;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        //获取LinearLayout布局容器
        LinearLayout main = (LinearLayout)findViewById(R.id.root);
        //程序创建ImageView组件
        final ImageView image = new ImageView(this);
        //将ImageView组件添加到LinearLayout布局容器中
        main.addView(image);
        //初始化时显示第一张图片
        image.setImageResource(images[0]);
        image.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                if (currentImg >= 4)
                {
                    currentImg = -1;
                }
                //改变ImageView里显示的图片
                image.setImageResource(images[++currentImg]);
            }
        });
    }
}

<?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>

也可以在布局文件中添加ImageView，效果已也是一样，而MainActivity.java则改为：

LinearLayout main = (LinearLayout)findViewById(R.id.root);
final ImageView image=(ImageView) findViewById(R.id.imageView);//为xml的ImageView的ID
image.setImageResource(images[0]);