Android修改viewpage滑动速度的实现代码

public class ViewPageFixedSpeedScroller extends Scroller { 
  private int mDuration = 300; 
  public ViewPageFixedSpeedScroller(Context context) { 
    super(context); 
    // TODO Auto-generated constructor stub 
  } 
  public ViewPageFixedSpeedScroller(Context context, Interpolator interpolator) { 
    super(context, interpolator); 
  } 
  @Override 
  public void startScroll(int startX, int startY, int dx, int dy, int duration) { 
    // Ignore received duration, use fixed one instead 
    super.startScroll(startX, startY, dx, dy, mDuration); 
  } 
  @Override 
  public void startScroll(int startX, int startY, int dx, int dy) { 
    // Ignore received duration, use fixed one instead 
    super.startScroll(startX, startY, dx, dy, mDuration); 
  } 
  public void setmDuration(int time) { 
    mDuration = time; 
  } 
  public int getmDuration() { 
    return mDuration; 
  } 
} 

2、通过反射修改viewpage 的scoller
try { 
//通过反射找到当前class 文件里的mScroller的mScrooller对象 
//getDeclaredField是可以获取一个类的所有字段.  
//getField只能获取类的public 字段.  
  Field mField = ViewPager.class.getDeclaredField("mScroller");  mField.setAccessible(true);//设置了private属性的对象也能获取的 
  Scroller mScroller = new ViewPageFixedSpeedScroller(page.getContext(), new LinearInterpolator()); 
  mField.set(page, mScroller); 
} catch (Exception e) { 
  e.printStackTrace(); 
}