Android在Gallery中每次滑动只显示一页

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.Gallery; 

public class DetialGallery extends Gallery { 

    public DetialGallery(Context context ,AttributeSet attrSet) {
     super(context,attrSet);
     // TODO Auto-generated constructor stub
    } 

private boolean isScrollingLeft(MotionEvent e1, MotionEvent e2)
   {
    return e2.getX() > e1.getX();
   }
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
   float velocityY) {
  // TODO Auto-generated method stub
//  return super.onFling(e1, e2, 0, velocityY);//方法一：只去除翻页惯性
//  return false;//方法二：只去除翻页惯性  注：没有被注释掉的代码实现了开始说的2种效果。
  int kEvent;
  if(isScrollingLeft(e1, e2)){
   //Check if scrolling left
   kEvent = KeyEvent.KEYCODE_DPAD_LEFT;
   }  else{
    //Otherwise scrolling right
    kEvent = KeyEvent.KEYCODE_DPAD_RIGHT;
    }
  onKeyDown(kEvent, null);
  return true;
  }
} 

亲测可以达到效果，转自http://hi.baidu.com/lvqiyong/blog/item/afbaad3daa102ff454e72390.html