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