1.判断ListView已滑动到顶部
public boolean isListViewReachTopEdge(final ListView listView) {
boolean result=false;
if(listView.getFirstVisiblePosition()==0){
final View topChildView = listView.getChildAt(0);
result=topChildView.getTop()==0;
}
return result ;
}
注意:
view的getTop()表示的是该View的顶部到父控件的左上角的垂直距离。
当ListView的第一个child View的getTop()为零时,就表示ListView已经滚动到顶部了或已经在顶部不能在向上滑动了。
2.判断ListView已滑动到底部
public boolean isListViewReachBottomEdge(final ListView listView) {
boolean result=false;
if (listView.getLastVisiblePosition() == (listView.getCount() - 1)) {
final View bottomChildView = listView.getChildAt(listView.getLastVisiblePosition() - listView.getFirstVisiblePosition());
result= (listView.getHeight()>=bottomChildView.getBottom());
};
return result;
}
注意:
view的getBottom()表示的是该View底部到父控件的左上角的垂直距离
当ListView的最后一个child View的getBottom()小于等于ListView的getHeight()时,就表示ListView滚动到底部或已经在底部了,不能再向下滑动了。
3.判断ListView已滑动到底部(setOnScrollListener)
@Override
public void onScrollStateChanged(AbsListView absListView, int scrollState) {
switch (absListView.getId()) {
case R.id.lv_list:
if (is_scrolling && AbsListView.OnScrollListener.SCROLL_STATE_IDLE == scrollState) {
}
break;
}
}
@Override
public void onScroll(AbsListView absListView, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
switch (absListView.getId()) {
case R.id.lv_list:
if ((firstVisibleItem + visibleItemCount == totalItemCount) && totalItemCount != 0) {
is_scrolling = true;
} else {
is_scrolling = false;
}
break;
}
}