public boolean shouldHandleRecyclerViewLoadingMore(RecyclerView recyclerView) {
if (mIsLoadingMore
|| mCurrentRefreshStatus == RefreshStatus.REFRESHING
|| mLoadMoreFooterView == null
|| mDelegate == null
|| recyclerView.getAdapter() == null
|| recyclerView.getAdapter().getItemCount() == 0) {
return false;
}
RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();
if (manager == null || manager.getItemCount() == 0) {
return false;
}
if (manager instanceof LinearLayoutManager) {
LinearLayoutManager layoutManager = (LinearLayoutManager) manager;
if (layoutManager.findLastCompletelyVisibleItemPosition()
== recyclerView.getAdapter().getItemCount() - 1) {
return true;
}
} else if (manager instanceof StaggeredGridLayoutManager) {
StaggeredGridLayoutManager layoutManager = (StaggeredGridLayoutManager) manager;
int[] out = layoutManager.findLastCompletelyVisibleItemPositions(null);
int lastPosition = layoutManager.getItemCount() - 1;
for (int position : out) {
if (position == lastPosition) {
return true;
}
}
}
return false;
}
public int getLastVisiblePosition() {
LayoutManager layoutManager = getLayoutManager();
if (null == layoutManager) return -1;
int curItemCount = (null != mReqAdapter ? mReqAdapter.getItemCount() - 1 : 0);
int ret = -1;
switch (mLayoutManagerType) {
case LAYOUT_MANAGER_TYPE_LINEAR:
ret =
((LinearLayoutManager) layoutManager).findLastCompletelyVisibleItemPosition()
- getHeaderViewsCount();
if (ret > curItemCount) {
ret -= getFooterViewsCount();
}
break;
case LAYOUT_MANAGER_TYPE_GRID:
ret =
((GridLayoutManager) layoutManager).findLastCompletelyVisibleItemPosition()
- getHeaderViewsCount();
if (ret > curItemCount) {
ret -= getFooterViewsCount();
}
break;
case LAYOUT_MANAGER_TYPE_STAGGERED_GRID:
StaggeredGridLayoutManager tempStaggeredGridLayoutManager =
(StaggeredGridLayoutManager) layoutManager;
int[] lastVisibleItemPositions = new int[tempStaggeredGridLayoutManager.getSpanCount()];
tempStaggeredGridLayoutManager.findLastCompletelyVisibleItemPositions(
lastVisibleItemPositions);
if (lastVisibleItemPositions.length > 0) {
int maxPos = lastVisibleItemPositions[0];
for (int curPos : lastVisibleItemPositions) {
if (curPos > maxPos) maxPos = curPos;
}
ret = maxPos - getHeaderViewsCount();
if (ret > curItemCount) {
ret -= getFooterViewsCount();
}
}
break;
}
return ret < 0 ? (null != mReqAdapter ? mReqAdapter.getItemCount() - 1 : 0) : ret;
}