原理
在android2.3版本中，View類中新增了一個方法：overScrollBy。通過覆蓋該方法，就可以達到阻尼回彈的效果。
示例1、豎向滾動
public class ReboundScrollView extends ScrollView{ private static final int MAX_SCROLL = 200; private static final float SCROLL_RATIO = 0.5f;// 阻尼系數 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; //回彈最后一次滾動，復位 }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、橫向滾動
public class ReboundHScrollView extends HorizontalScrollView{ private static final int MAX_SCROLL = 200; private static final float SCROLL_RATIO = 0.5f;// 阻尼系數 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; //回彈最后一次滾動，復位 }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內容，希望對大家的學習有所幫助，也希望大家多多支持武林網。
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