使用ListView将位置拖到顶部和底部默认是没有回弹效果的，为了增加这个效果，方法如下：

1、开启overScrollMode为always

在布局中 android:overScrollMode="always"

或在代码中 setOverScrollMode(View.OVER_SCROLL_ALWAYS);

2、继承listview 覆盖overScrollBy方法，并且利用反射机制修改阴影效果为透明

public class PullListview extends ListView {

private static final int MAX_Y_OVERSCROLL_DISTANCE = 100;

private Context mContext;

private int mMaxYOverscrollDistance;

public PullListview(Context context) {

super(context);

mContext = context;

initPullListview();

}

public PullListview(Context context, AttributeSet attrs) {

super(context, attrs);

mContext = context;

initPullListview();

}

public PullListview(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

mContext = context;

initPullListview();

}

private void initPullListview() {

// get the density of the screen and do some maths with it on the max

// overscroll distance

// variable so that you get similar behaviors no matter what the screen

// size

final DisplayMetrics metrics = mContext.getResources()

.getDisplayMetrics();

final float density = metrics.density;

mMaxYOverscrollDistance = (int)(density * MAX_Y_OVERSCROLL_DISTANCE);

// this.setOverScrollMode(View.OVER_SCROLL_ALWAYS);

try {

Class < ? > c = (Class < ? > ) Class.forName(AbsListView.class.getName());

Field egtField = c.getDeclaredField("mEdgeGlowTop");

Field egbBottom = c.getDeclaredField("mEdgeGlowBottom");

egtField.setAccessible(true);

egbBottom.setAccessible(true);

Object egtObject = egtField.get(this); // this 指的是ListiVew实例

Object egbObject = egbBottom.get(this);

// egtObject.getClass() 实际上是一个 EdgeEffect 其中有两个重要属性 mGlow mEdge

// 并且这两个属性都是Drawable类型

Class < ? > cc = (Class < ? > ) Class.forName(egtObject.getClass()

.getName());

Field mGlow = cc.getDeclaredField("mGlow");

mGlow.setAccessible(true);

mGlow.set(egtObject, new ColorDrawable(Color.TRANSPARENT));

mGlow.set(egbObject, new ColorDrawable(Color.TRANSPARENT));

Field mEdge = cc.getDeclaredField("mEdge");

mEdge.setAccessible(true);

mEdge.set(egtObject, new ColorDrawable(Color.TRANSPARENT));

mEdge.set(egbObject, new ColorDrawable(Color.TRANSPARENT));

} catch (Exception e) {

e.printStackTrace();

}

}

@SuppressLint("NewApi")

@Override

protected boolean overScrollBy(int deltaX, int deltaY, int scrollX,

int scrollY, int scrollRangeX, int scrollRangeY,

int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {

// This is where the magic happens, we have replaced the incoming

// maxOverScrollY with our own custom variable mMaxYOverscrollDistance;

return super.overScrollBy(deltaX, deltaY, scrollX, scrollY,

scrollRangeX, scrollRangeY, maxOverScrollX,

mMaxYOverscrollDistance, isTouchEvent);

}

}