关于在Android中实现ListView的弹性效果，有很多不同的方法，网上一搜，也有很多，下面贴出在项目中经常用到的两种实现ListView弹性效果的方法(基本上拿来就可以用)，供大家参考:

弹性ListView

第一种方法：

import android.content.Context;

import android.content.res.Configuration;

import android.util.AttributeSet;

import android.util.DisplayMetrics;

import android.view.View;

import android.view.ViewConfiguration;

import android.widget.ListView;

import java.lang.reflect.Field;

import java.lang.reflect.Modifier;

/**

* Created by Noah on 2016/1/16.

*/

public class BounceListView extends ListView {

private static final float MAX_Y_OVERSCROLL_DISTANCE = 200;

private float mMaxYOverscrollDistance;

public BounceListView(Context context) {

this(context, null);

}

public BounceListView(Context context, AttributeSet attrs) {

this(context, attrs, 0);

}

public BounceListView(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

initBounceListView();

}

private void initBounceListView(){

final DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();

final float density = metrics.density;

mMaxYOverscrollDistance = (int) (density * MAX_Y_OVERSCROLL_DISTANCE);

}

@Override

protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {

return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, (int)mMaxYOverscrollDistance, isTouchEvent);

}

/**

* 设置本App所有的ListView弹性粒度

* @param ctx

* @param size

* @return

*/

public boolean configGlobalMaxOverScrollDistance(Context ctx,int size)

{

try {

final DisplayMetrics metrics = ctx.getResources().getDisplayMetrics();

final float density = metrics.density;

int value = (int) (density * size);

mMaxYOverscrollDistance = value;

ViewConfiguration config = ViewConfiguration.get(ctx);

Field mOverscrollDistance = ViewConfiguration.class.getDeclaredField("mOverscrollDistance");

if(!mOverscrollDistance.isAccessible() || !Modifier.isPublic(mOverscrollDistance.getModifiers()))

{

mOverscrollDistance.setAccessible(true);

}

mOverscrollDistance.setInt(config,value);

} catch (Exception e) {

e.printStackTrace();

return false;

}

return true;

}

}

第二种比较简单，好容易理解，只是动态改变了ListView在Y轴上的可移动距离，代码如下：

import android.content.Context;

import android.util.AttributeSet;

import android.util.DisplayMetrics;

import android.widget.ListView;

/**

* 弹性ListView。

* @author E

*/

public class FlexiListView extends ListView{

//初始可拉动Y轴方向距离

private static final int MAX_Y_OVERSCROLL_DISTANCE = 100;

//上下文环境

private Context mContext;

//实际可上下拉动Y轴上的距离

private int mMaxYOverscrollDistance;

public FlexiListView(Context context){

super(context);

mContext = context;

initBounceListView();

}

public FlexiListView(Context context, AttributeSet attrs) {

super(context, attrs);

mContext = context;

initBounceListView();

}

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

super(context, attrs, defStyle);

mContext = context;

initBounceListView();

}

private void initBounceListView(){

final DisplayMetrics metrics = mContext.getResources().getDisplayMetrics();

final float density = metrics.density;

mMaxYOverscrollDistance = (int) (density * MAX_Y_OVERSCROLL_DISTANCE);

}

@Override

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

int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) {

//实现的本质就是在这里动态改变了maxOverScrollY的值

return super.overScrollBy(deltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, mMaxYOverscrollDistance, isTouchEvent);

}

}

第三种方法，结合了手势来实现ListView的弹性效果,这里可以根据手势来进行更多的扩展,代码如下:

import android.content.Context;

import android.graphics.Rect;

import android.util.AttributeSet;

import android.view.GestureDetector;

import android.view.GestureDetector.OnGestureListener;

import android.view.MotionEvent;

import android.view.View;

import android.view.animation.TranslateAnimation;

import android.widget.ListView;

/**

* 具有弹性效果的ListView。主要是实现父类dispatchTouchEvent方法和OnGestureListener中onScroll方法。

* @author E

*/

public class FlexibleListView extends ListView implements OnGestureListener{

private Context context = null;

private boolean outBound = false;

private int distance;

private int firstOut;

public FlexibleListView(Context context, AttributeSet attrs) {

super(context, attrs);

this.context = context;

}

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

super(context, attrs, defStyle);

this.context = context;

}

public FlexibleListView(Context context) {

super(context);

this.context = context;

}

GestureDetector lisGestureDetector = new GestureDetector(context, this);

@Override

public boolean dispatchTouchEvent(MotionEvent event) {

int act = event.getAction();

if ((act == MotionEvent.ACTION_UP || act == MotionEvent.ACTION_CANCEL)

&& outBound) {

outBound = false;

// scroll back

}

if (!lisGestureDetector.onTouchEvent(event)) {

outBound = false;

} else {

outBound = true;

}

Rect rect = new Rect();

getLocalVisibleRect(rect);

TranslateAnimation am = new TranslateAnimation( 0, 0, -rect.top, 0);

am.setDuration(300);

startAnimation(am);

scrollTo(0, 0);

return super.dispatchTouchEvent(event);

}

@Override

public boolean onDown(MotionEvent e) {

return false;

}

@Override

public void onShowPress(MotionEvent e) {

}

@Override

public boolean onSingleTapUp(MotionEvent e) {

return false;

}

@Override

public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,

float distanceY) {

int firstPos = getFirstVisiblePosition();

int lastPos = getLastVisiblePosition();

int itemCount = getCount();

// outbound Top

if (outBound && firstPos != 0 && lastPos != (itemCount - 1)) {

scrollTo(0, 0);

return false;

}

View firstView = getChildAt(firstPos);

if (!outBound)

firstOut = (int) e2.getRawY();

if (firstView != null&& (outBound || (firstPos == 0

&& firstView.getTop() == 0 && distanceY < 0))) {

// Record the length of each slide

distance = firstOut - (int) e2.getRawY();

scrollTo(0, distance / 2);

return true;

}

// outbound Bottom

return false;

}

@Override

public void onLongPress(MotionEvent e) {

}

@Override

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

float velocityY) {

return false;

}

}

以上给大家分享了几种比较常用的方法，脚本之家小编整理出来的，希望对大家有所帮助。