Android图片之滑动效果(Gallery)

package wei.ye.g1;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

public class Huadong extends Activity {
private static int[] images = { R.drawable.baos, R.drawable.caoc,
R.drawable.chenyj, R.drawable.chenyy, R.drawable.gouj,
R.drawable.guany, R.drawable.hanx, R.drawable.lp, R.drawable.liub,
R.drawable.qinq, R.drawable.tiemz, R.drawable.wus,
R.drawable.xiangy, R.drawable.yuef, R.drawable.zhaoky,
R.drawable.zhugl, R.drawable.xis, R.drawable.yingz };
Gallery gallery;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.huadong);
setTitle("只用了Gallery的效果");
gallery = (Gallery) findViewById(R.id.gallery1);
gallery.setAdapter(new ImageAdapter(this));
gallery.setSelection(images.length / 2);
}

private class ImageAdapter extends BaseAdapter {
private Context context;

public ImageAdapter(Context context) {
this.context = context;
}

// 可以return images.lenght(),在这里返回Integer.MAX_VALUE
// 是为了使图片循环显示
public int getCount() {
return Integer.MAX_VALUE;
}

public Object getItem(int position) {
return null;
}

public long getItemId(int position) {
return 0;
}

public View getView(int position, View convertView, ViewGroup parent) {
ImageView iv = new ImageView(context);
//设置具体要显示的图片
iv.setImageResource(images[position % images.length]);
//设置ImageView的高度和宽度
iv.setLayoutParams(new Gallery.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
iv.setAdjustViewBounds(true);
return iv;
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<Gallery android:layout_width="fill_parent" android:id="@+id/gallery1"
android:layout_height="fill_parent" android:spacing="16dp"></Gallery>
</RelativeLayout>