監聽ScrollView的滾動

public class MyScrollView extends ScrollView{
	private OnScrollListener listener = null;
	
	public MyScrollView(Context context) {
		super(context);
	}

	public MyScrollView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}

	public MyScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public void setOnScrollListener(OnScrollListener listener){
		this.listener = listener;
	}

	public interface OnScrollListener{
		public void onScrolled();
	}
	
	@Override
	protected void onScrollChanged(int l, int t, int oldl, int oldt) {
		// TODO Auto-generated method stub
		super.onScrollChanged(l, t, oldl, oldt);
		if(listener != null){
			listener.onScrolled();
		}
	}

}