/**
* Refreshes the content of the parent list view while maintaining the current vertical position
* in the list view.
*/
private void refreshListView(ViewGroup parent, Group updatedGroup) {
// Get position of first and last visible list items
AbsListView parentListView = (AbsListView) parent.findViewById(android.R.id.list);
int firstVisible = parentListView.getFirstVisiblePosition();
int lastVisible = parentListView.getLastVisiblePosition();
// Populate list view
mItems.clear();
List<Group> groups = Group.getAllSortedByDisplayOrder();
for (Group group : groups) {
mItems.add(group.name);
}
notifyDataSetChanged();
// Handle case where item is at visible top and moved up.
if (firstVisible >= updatedGroup.getDisplayOrder()) {
parentListView.setSelection(updatedGroup.getDisplayOrder() - 1);
// Handle case where item is at visible bottom and moved down.
} else if (lastVisible < updatedGroup.getDisplayOrder()) {
parentListView.setSelection(firstVisible + 1);
// Handle move cases in the middle of viewable listview.
} else {
parentListView.setSelection(firstVisible);
}
}
public void onScroll(
AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (view.getLastVisiblePosition() >= totalItemCount - 5 && !searchBusy) {
if (searchMode == Var.SEARCH_YOUTUBE) searchYoutube();
// if(searchMode == Var.SEARCH_TWITTER) searchTwitter();
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
// 判断是否滚动到底部
if (view.getLastVisiblePosition() == view.getCount() - 1) {
getResource();
}
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == SCROLL_STATE_IDLE
&& view.getLastVisiblePosition() >= view.getCount() - THRESHOLD
&& !mLoding) {
mLoding = true;
loadPhotos();
}
}
@Override
public void onScrollStateChanged(AbsListView listView, int scrollState) {
if (scrollState == SCROLL_STATE_IDLE) {
// load 3 (4-1) items before we reach the end of the list
if (listView.getLastVisiblePosition() >= listView.getCount() - 4) {
currentPage++;
getLoaderManager().restartLoader(0, null, this);
}
}
}
@Override
public void onScroll(
AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
mFirstVisibleItem = firstVisibleItem;
if (view.getFirstVisiblePosition() == 1) {
mIsTop = true;
} else if (view.getLastVisiblePosition() == view.getCount() - 1) {
mIsBottom = true;
} else {
mIsTop = false;
mIsBottom = false;
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// Toast.makeText(context, "state change End", Toast.LENGTH_SHORT).show();
if (scrollState != SCROLL_STATE_FLING
&& lastScrollState == SCROLL_STATE_FLING
&& view.getLastVisiblePosition() == getCount() - 1
&& scrollCheck) {
// Toast.makeText(context, "call", Toast.LENGTH_SHORT).show();
// avoid duplicate calls
scrollCheck = false;
// call next page data
makePaginationCall();
}
lastScrollState = scrollState;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
switch (scrollState) {
// 当不滚动时
case AbsListView.OnScrollListener.SCROLL_STATE_IDLE:
// 判断滚动到底部
if (view.getLastVisiblePosition() == (view.getCount() - 1)) {
Log.d("---'", "到底啦！" + isLoading);
Story b = adapter.getLast();
if (b != null) {
getBefore(b.getId());
}
}
break;
}
}
@Override
public void onScrollStateChanged(AbsListView listView, int scrollState) {
if (autoLoadMore) {
if (hasMoreData) {
if (!isLoading()) {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE
&& listView.getLastVisiblePosition() + 1 == listView.getCount()) { // 如果滚动到最后一行
// 如果网络可以用
if (needCheckNetwork && !NetworkUtils.hasNetwork(context)) {
mLoadMoreView.showFail();
} else {
loadMore();
}
}
}
}
}
}
public boolean canChildScrollDown() {
if (android.os.Build.VERSION.SDK_INT < 14) {
if (mTarget instanceof AbsListView) {
final AbsListView absListView = (AbsListView) mTarget;
View lastChild = absListView.getChildAt(absListView.getChildCount() - 1);
if (lastChild != null) {
return (absListView.getLastVisiblePosition() == (absListView.getCount() - 1))
&& lastChild.getBottom() > absListView.getPaddingBottom();
} else {
return false;
}
} else {
return mTarget.getHeight() - mTarget.getScrollY() > 0;
}
} else {
return ViewCompat.canScrollVertically(mTarget, 1);
}
}
public boolean shouldHandleAbsListViewLoadingMore(AbsListView absListView) {
if (mIsLoadingMore
|| mCurrentRefreshStatus == RefreshStatus.REFRESHING
|| mLoadMoreFooterView == null
|| mDelegate == null
|| absListView == null
|| absListView.getAdapter() == null
|| absListView.getAdapter().getCount() == 0) {
return false;
}
int lastChildBottom = 0;
if (absListView.getChildCount() > 0) {
// 如果AdapterView的子控件数量不为0，获取最后一个子控件的bottom
lastChildBottom = absListView.getChildAt(absListView.getChildCount() - 1).getBottom();
}
return absListView.getLastVisiblePosition() == absListView.getAdapter().getCount() - 1
&& lastChildBottom <= absListView.getMeasuredHeight();
}
@Override
public void onScrollStateChanged(AbsListView listview, int scrollState) {
switch (scrollState) {
// 当不滚动时
case OnScrollListener.SCROLL_STATE_IDLE:
// 判断滚动到底部
if (!isLoadingMore) {
if (listview.getLastVisiblePosition() == (listview.getCount() - 1)) {
if (currentPageNum < pageCount) {
currentPageNum++;
isLoadingMore = true;
loadReferenceList();
} else {
handler.sendEmptyMessageDelayed(NORE_MORE_DATA, 100);
}
}
}
break;
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {
// 判断是否滚动到底部
int lastIndex = view.getLastVisiblePosition();
int count = view.getCount();
if (lastIndex == count - 1 || lastIndex == count - 2) {
footer.setVisibility(View.VISIBLE);
if (((lastIndex - 1) % 10 == 0 || lastIndex % 10 == 0) && count > 2) {
footer.findViewById(R.id.footer_progressBar).setVisibility(View.VISIBLE);
footer.findViewById(R.id.footer_hint).setVisibility(View.GONE);
if (footerState != LOADING_MORE) {
refreshListener.onShowNextPage();
footerState = LOADING_MORE;
}
} else {
footer.findViewById(R.id.footer_progressBar).setVisibility(View.GONE);
footer.findViewById(R.id.footer_hint).setVisibility(View.VISIBLE);
}
}
}
}
/**
* 子控件为ListView等时，ACTION_MOVE执行几次后this.disallowIntercept=true;
* 造成的影响：用户体验不好！（如果从中间滑到顶部或底部是不会进入onInterceptTouchEvent方法的，拦截不到事件，不能执行刷新加载相关功能）
* 解决办法：重写requestDisallowInterceptTouchEvent，过滤disallowIntercept=true。
* 缺点：这样会导致子控件调用parent.requestDisallowInterceptTouchEvent(true)失效。
*
* <p>ViewGroup类dispatchTouchEvent方法关键代码： final boolean disallowIntercept = (mGroupFlags &
* FLAG_DISALLOW_INTERCEPT) != 0; if (!disallowIntercept) { intercepted =
* onInterceptTouchEvent(ev); }
*
* @param ev
* @return
*/
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
printLog("parent onInterceptTouchEvent:" + ev.getAction());
int action = ev.getAction();
if (pullView.doMainType == pullView.NONE && action == MotionEvent.ACTION_DOWN) {
reset();
}
if (pullView.doMainType == pullView.REFRESHING || pullView.doMainType == pullView.LOADING) {
printLog("parent onInterceptTouchEvent result:" + !refreshingOrLoadingOverScrollEnabled);
return !refreshingOrLoadingOverScrollEnabled;
}
printLog("parent onInterceptTouchEvent result:" + isGetFinalDirection);
if (isGetFinalDirection) {
// getParent().requestDisallowInterceptTouchEvent(true);
return true;
}
// 得到可能的方向
if (this.direction.type == Direction.NONE && this.directionEnable.type != Direction.NONE) {
this.startY = ev.getY();
printLog("startY：" + startY);
for (View view : conditionChildViews) {
printLog(view.getClass().getSimpleName());
if (view instanceof AbsListView) {
AbsListView absListView = (AbsListView) view;
Direction direction = new Direction();
View firstView = absListView.getChildAt(0);
View lastView = absListView.getChildAt(absListView.getChildCount() - 1);
if (firstView == null
|| (absListView.getFirstVisiblePosition() == 0
&& firstView.getTop() >= view.getTop())) {
printLog("顶部");
direction.addDirection(Direction.DOWN_PULL);
}
if (lastView == null
|| (absListView.getLastVisiblePosition() == (absListView.getCount() - 1)
&& lastView.getBottom() <= view.getBottom())) {
printLog("底部");
direction.addDirection(Direction.UP_PULL);
}
if (direction.type == Direction.NONE) {
this.direction.type = Direction.NONE;
printLog("NONE");
break;
}
this.direction.configDirection(direction.type);
} else if (view instanceof ScrollView) {
ScrollView scrollView = (ScrollView) view;
Direction direction = new Direction();
int scrollY = view.getScrollY();
int height = view.getHeight();
int scrollViewMeasuredHeight = scrollView.getChildAt(0).getMeasuredHeight();
if (scrollY == 0) {
printLog("顶部");
direction.addDirection(Direction.DOWN_PULL);
}
if ((scrollY + height) == scrollViewMeasuredHeight) {
printLog("底部");
direction.addDirection(Direction.UP_PULL);
}
if (direction.type == Direction.NONE) {
this.direction.type = Direction.NONE;
printLog("NONE");
break;
}
this.direction.configDirection(direction.type);
} else {
if (view.getScrollY() == 0) {
printLog("顶部");
direction.addDirection(Direction.DOWN_PULL);
}
if (true) { // TODO 哈哈(待修改)
printLog("底部");
direction.addDirection(Direction.UP_PULL);
}
if (direction.type == Direction.NONE) {
this.direction.type = Direction.NONE;
printLog("NONE");
break;
}
this.direction.configDirection(direction.type);
}
}
this.direction.takeIntersection(this.directionEnable);
}
// 得到最终方向
else if (this.direction.type != Direction.NONE) {
findFinalDirection(ev);
}
return false;
}
@Override
public void onScrollStateChanged(final AbsListView view, int scrollState) {
super.onScrollStateChanged(view, scrollState);
if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
int currentFirstVisiblePosition = view.getFirstVisiblePosition();
if (currentFirstVisiblePosition == 0) {
// 滚动到顶部
View v = (View) view.getChildAt(0);
int[] location = new int[2];
// 获取在整个屏幕内的绝对坐标
v.getLocationOnScreen(location);
int y = location[1];
if (currentFirstVisiblePosition != firstVisiblePosition && firstLocationY != y) {
// 第一次拖至顶部
firstVisiblePosition = currentFirstVisiblePosition;
firstLocationY = y;
return;
} else if (currentFirstVisiblePosition == firstVisiblePosition && firstLocationY == y) {
User firstUser = personList.get(0);
// 第二次拖至顶部
logic.queryUser(
queryType,
queryValue,
ORDER_BY_NEWEST,
firstUser.getLastLoginTime(),
8,
createUIEventListener(
new EventListener() {
@Override
public void onEvent(EventId id, EventArgs args) {
stopLoading();
UserEventArgs result = (UserEventArgs) args;
OperErrorCode errCode = result.getErrCode();
if (errCode == OperErrorCode.Success) {
List<User> userList = result.getUserList();
if (userList != null && userList.size() > 0) {
personList.addAll(0, userList);
imageAdapter.notifyDataSetChanged();
personsGridView.smoothScrollToPosition(0);
}
}
}
}));
startLoading();
}
} else {
int currentLastVisiblePosition = view.getLastVisiblePosition();
if (currentLastVisiblePosition == (view.getCount() - 1)) {
// 滚动到底部
View v = (View) view.getChildAt(view.getChildCount() - 1);
int[] location = new int[2];
// 获取在整个屏幕内的绝对坐标
v.getLocationOnScreen(location);
int y = location[1];
if (currentLastVisiblePosition != lastVisiblePosition && lastLocationY != y) {
// 第一次拖至底部
lastVisiblePosition = currentLastVisiblePosition;
lastLocationY = y;
return;
} else if (currentLastVisiblePosition == lastVisiblePosition && lastLocationY == y) {
// 第二次拖至底部
User lastUser = personList.get(personList.size() - 1);
// 第二次拖至顶部
logic.queryUser(
queryType,
queryValue,
ORDER_BY_EARLIEST,
lastUser.getLastLoginTime(),
8,
createUIEventListener(
new EventListener() {
@Override
public void onEvent(EventId id, EventArgs args) {
stopLoading();
UserEventArgs result = (UserEventArgs) args;
OperErrorCode errCode = result.getErrCode();
if (errCode == OperErrorCode.Success) {
List<User> userList = result.getUserList();
if (userList != null && userList.size() > 0) {
personList.addAll(userList);
imageAdapter.notifyDataSetChanged();
personsGridView.smoothScrollToPosition(view.getCount());
}
}
}
}));
startLoading();
}
}
}
// 未滚动到顶部
firstVisiblePosition = -1;
firstLocationY = 0;
// 未滚动到底部
lastVisiblePosition = 0;
lastLocationY = 0;
}
}