为什么我执行此方法是五响应

rlbttom.setOnTouchListener(new OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
int y=(int)event.getY();
Log.i("info", "+y"+y);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
toprl.getHeight()-y);
Log.i("info", "+y"+y);
toprl.setLayoutParams(lp2);
break;
case MotionEvent.ACTION_UP:

            break;

        }
        return false;
    }

http://blog.sina.com.cn/s/blog_4e1e357d0101eacs.html

没有触发事件的条件，

先判断是否进入该监听方法