android - 如何检测 Android ListView 中的过度滚动？

Question

当用户滚动列表视图时，我想显示/隐藏视图。

如何检测过度滚动？有听众吗？我已经尝试过OnScrollListener，但它只通知onScrollStateChanged和onScroll

Answer 1

您可以覆盖方法onOverScrolled，因为它respond to the results of an over-scroll operation.

Answer 2

只是更完整的答案

@Override
protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
    super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);

    View view = (View) getChildAt(getChildCount()-1);
    int diff = (view.getBottom()-(getHeight()+getScrollY()));

    if(diff==0) {
           //overscroll on bottom
       } else {
           //overscroll on top
       }    
}

Answer 3

scrollY = 非零和clampedY = true --> OverScroll 状态发生在从下到上滚动时

scrollY = 零和clampedY = true --> OverScroll 状态发生在从上到下滚动时

所以

@Override
protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
    super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);

    if(clampedY){
        if(scrollY==0){
            //over Scroll at top
        }else {
            //over Scroll at Bottom
        }
    }
}