如何判断scrollview的滚动条已经滚动到底部

在android中如何判断scrollview的滚动条已经滚动到底部了呢，下面是具体的判断代码

if(getScrollY() + getHeight() >=  computeVerticalScrollRange())
{
Log.d(TAG,"------滚动到最下方------");
}
else
{
Log.d(TAG,"没有到最下方");
}

在实际应用中，可以继承ScrollView,来实现这个功能，如下：

public class XScrollView extends ScrollView {\r\n  \r\n      \r\n    protected Context ctx=null;\r\n    public XScrollView(Context context) {\r\n        super(context);\r\n        ctx=context;\r\n          \r\n        // TODO Auto-generated constructor stub\r\n    }\r\n    protected OnScrollStateChanged sc=null;\r\n    public void setOnScrollStateChanged(OnScrollStateChanged _sc)\r\n    {\r\n        sc=_sc;\r\n    }\r\n    @Override\r\n    protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX,\r\n            boolean clampedY) {\r\n        // TODO Auto-generated method stub\r\n        if(getScrollY() + getHeight() >=  computeVerticalScrollRange())\r\n        {\r\n            sc.ScrollBottom();\r\n        }\r\n        super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);\r\n    }\r\n}

public interface OnScrollStateChanged\r\n{\r\n    public void ScrollTop();\r\n    public void ScrollBottom();\r\n}