ScrollView滑动到底部的实现_类似弹簧效果

二话不说，把代码贴出来：


package com.demo.main;

import android.app.Activity;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.FrameLayout;
import android.widget.FrameLayout.LayoutParams;
import android.widget.ScrollView;

public class DemoActivity extends Activity
{
float eventY;
int bottomY = 0;
int scrollY;
ScrollView scrollView;
FrameLayout.LayoutParams params;

@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.demo);

scrollView = (ScrollView) findViewById(R.id.scrollView);//得到ScrollView Id

params = new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);//动态设置宽高

scrollView.setOnTouchListener(new OnTouchListener()
{
@Override
public boolean onTouch(View v, final MotionEvent event)
{
if (MotionEvent.ACTION_MOVE == event.getAction())//判断是否在滑动
{
float Y = event.getY();//得到滑动中Y轴的值
if (eventY > Y)//判断是否向上滑动
{
int sY = scrollView.getScrollY();//得到scrollView的垂直位移
if (scrollY == sY)//判断是否滑动到底部
{
bottomY += 5;
params.setMargins(0, 0, 0, bottomY);//设置margin
scrollView.setLayoutParams(params);
}
else
{
scrollY = sY;
}
}
else
{
eventY = Y;
}
}
if (1 == event.getAction())//判读是否停止触碰
{
                                              eventY = 0;
bottomY = 0;
params.setMargins(0, 0, 0, 0);
scrollView.setLayoutParams(params);
}
return false;
}
});
}
}