Android编程实现Gallery中每次滑动只显示一页的方法

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; }}