本文实例为大家分享了Android ScrollView实现拖动回弹效果的具体代码，供大家参考，具体内容如下

原理

在android2.3版本中，View类中新增了一个方法：overScrollBy。通过覆盖该方法，就可以达到阻尼回弹的效果。

示例1、竖向滚动

public class ReboundScrollView extends ScrollView{ private static final int MAX_SCROLL = 200; private static final float SCROLL_RATIO = 0.5f;// 阻尼系数 public ReboundScrollView(Context context) { super(context); } public ReboundScrollView(Context context, AttributeSet attrs) { super(context, attrs); } public ReboundScrollView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) { int newDeltaY = deltaY; int delta = (int) (deltaY * SCROLL_RATIO); if((scrollY+deltaY)==0 || (scrollY-scrollRangeY+deltaY)==0){ newDeltaY = deltaY; //回弹最后一次滚动，复位 }else{ newDeltaY = delta; //增加阻尼效果 } return super.overScrollBy(deltaX, newDeltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, maxOverScrollX, MAX_SCROLL, isTouchEvent); } }

示例2、横向滚动

public class ReboundHScrollView extends HorizontalScrollView{ private static final int MAX_SCROLL = 200; private static final float SCROLL_RATIO = 0.5f;// 阻尼系数 public ReboundHScrollView(Context context) { super(context); } public ReboundHScrollView(Context context, AttributeSet attrs) { super(context, attrs); } public ReboundHScrollView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } @Override protected boolean overScrollBy(int deltaX, int deltaY, int scrollX, int scrollY, int scrollRangeX, int scrollRangeY, int maxOverScrollX, int maxOverScrollY, boolean isTouchEvent) { int newDeltaX = deltaX; int delta = (int) (deltaX * SCROLL_RATIO); if((scrollX+deltaX)==0 || (scrollX-scrollRangeX+deltaX)==0){ newDeltaX = deltaX; //回弹最后一次滚动，复位 }else{ newDeltaX = delta; //增加阻尼效果 } return super.overScrollBy(newDeltaX, deltaY, scrollX, scrollY, scrollRangeX, scrollRangeY, MAX_SCROLL, maxOverScrollY, isTouchEvent); } }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。