不需要监听滑动位置，只需要重写ScrollView的onOverScrolled和stopNestedScroll方法就可以了
public class ReadScrollView extends ScrollView{
private int mScrollY = 0;
private boolean mClampedY = false;
public ReadScrollView(Context context) {
super(context);
}
public ReadScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public ReadScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
/**
* 监听变化---一般用不到
* @param scrollX
* @param scrollY
* @param clampedX
* @param clampedY
*/
// @Override
// protected void onScrollChanged(int l, int t, int oldl, int oldt) {
// super.onScrollChanged(l, t, oldl, oldt);
// if (scrollChangedListener != null){
// scrollChangedListener.onScrollChanged(l,t,oldl,oldt);
// }
//// DebugUtil.d("l==" + l +" t==" + t +" oldl==" + oldl + " oldt=="+oldt);
// }
@Override
protected void onOverScrolled(int scrollX, int scrollY, boolean clampedX, boolean clampedY) {
super.onOverScrolled(scrollX, scrollY, clampedX, clampedY);
//scrollY=位置0和最底y坐标;clampedY=是否到顶部或者底部
mScrollY = scrollY;
mClampedY = clampedY;
// DebugUtil.d("======l==onOverScrolled"+" scrollY="+scrollY+" clampedY="+clampedY );
}
/**
* 刷新到顶部和底部
*/
@Override
public void stopNestedScroll() {
super.stopNestedScroll();
if (mClampedY){
mClampedY = false;
if (mScrollY == 0){
scrollChangedListener.onScrollChangedTop();
}else {
scrollChangedListener.onScrollChangedBottom();
}
}
DebugUtil.d("======l==stopNestedScroll" );
}
OnScrollChangedListener scrollChangedListener;
public void setScrollChangedListener(OnScrollChangedListener scrollChangedListener) {
this.scrollChangedListener = scrollChangedListener;
}
/**
*
*/
public interface OnScrollChangedListener{
//到达顶部
void onScrollChangedTop();
//到达底部
void onScrollChangedBottom();
//监听变化
// void onScrollChanged(int l,int t,int oldl,int oldt);
}
}使用
scrollview.setScrollChangedListener(new ReadScrollView.OnScrollChangedListener() {
@Override
public void onScrollChangedTop() {
ShowUtils.toast("顶部");
}
@Override
public void onScrollChangedBottom() {
ShowUtils.toast("底部");
}
});