Android应用中的惯性滚动怎么利用 ScrollView取消

public class CustomHorizontalScrollView extends HorizontalScrollView {  private Context context;  private ScrollViewListenner listenner;  private CustomHorizontalScrollView currentView;  public CustomHorizontalScrollView(Context context) {    super(context);    // TODO Auto-generated constructor stub    this.context = context;  }  public CustomHorizontalScrollView(Context context, AttributeSet attrs) {    super(context, attrs);    // TODO Auto-generated constructor stub    this.context = context;  }  public CustomHorizontalScrollView(Context context, AttributeSet attrs,                   int defStyleAttr) {    super(context, attrs, defStyleAttr);    // TODO Auto-generated constructor stub    this.context = context;  }  @Override  public boolean onTouchEvent(MotionEvent ev) {    // TODO Auto-generated method stub    currentView = this;    return super.onTouchEvent(ev);  }  @Override  protected void onScrollChanged(int l, int t, int oldl, int oldt) {    // TODO Auto-generated method stub    if (null != listenner) {      this.listenner.onScrollChanged(currentView, l, t, oldl, oldt);    }    super.onScrollChanged(l, t, oldl, oldt);  }  public interface ScrollViewListenner {    public void onScrollChanged(CustomHorizontalScrollView view, int l,                  int t, int oldl, int oldt);  }  public void setScrollViewListenner(ScrollViewListenner listenner) {    this.listenner = listenner;  }  }