private boolean listViewStatus() {
boolean flag = false;
AdapterView<?> listView = null;
for (int i = 0; i < getChildCount(); i++) {
View v = getChildAt(i);
if (v instanceof AdapterView<?>) {
listView = (AdapterView<?>) v;
}
}
if (listView == null) { //
return false;
}
int frist = listView.getFirstVisiblePosition();
int last = listView.getLastVisiblePosition();
View top = listView.getChildAt(0);
View bottom = listView.getChildAt(listView.getChildCount() - 1);
if (top != null && frist == 0 && top.getTop() == 0) { // 最顶端
moveStatus = STATUS_REFRESH_TOP;
flag = true;
} else if (bottom != null
&& last >= (listView.getCount() - 1)
&& bottom.getBottom() == listView.getHeight()) { // 最底端
moveStatus = STATUS_REFRESH_FOOTER;
flag = true;
} else {
moveStatus = STATUS_REFRESH_NONE;
flag = false;
}
return flag;
}
private static boolean canAdapterViewScroll(AdapterView lv) {
/* Force it to layout it's children */
if (lv.getLastVisiblePosition() == -1) return false;
/* We can scroll if the first or last item is not visible */
boolean firstItemVisible = lv.getFirstVisiblePosition() == 0;
boolean lastItemVisible = lv.getLastVisiblePosition() == lv.getCount() - 1;
if (firstItemVisible && lastItemVisible && lv.getChildCount() > 0) {
/* Or the first item's top is above or own top */
if (lv.getChildAt(0).getTop() < lv.getPaddingTop()) return true;
/* or the last item's bottom is beyond our own bottom */
return lv.getChildAt(lv.getChildCount() - 1).getBottom()
> lv.getHeight() - lv.getPaddingBottom();
}
return true;
}