private void setupRecyclerView() {
if (itemList == null) {
itemList = createItemList();
}
adapter = new StaggeredGridLayoutAdapter(this, footerView);
StaggeredGridLayoutManager layoutManager =
new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
SpacesItemDecoration decoration =
new SpacesItemDecoration((int) getResources().getDimension(R.dimen.item_decoration));
recyclerView.setLayoutManager(layoutManager);
recyclerView.addItemDecoration(decoration);
adapter.setHeader(new HeaderObject("header")); // header can be null
adapter.setItems(itemList);
recyclerView.setAdapter(adapter);
recyclerView.addOnScrollListener(
new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
if (newState == RecyclerView.SCROLL_STATE_IDLE) {
StaggeredGridLayoutManager manager =
(StaggeredGridLayoutManager) recyclerView.getLayoutManager();
int[] lastVisibleItem = manager.findLastCompletelyVisibleItemPositions(null);
int spanCount = manager.getSpanCount();
int totalItemCount = manager.getItemCount();
if (lastVisibleItem[spanCount - 1] == (totalItemCount - 1)) {
loadMore();
}
}
}
});
}
private void addRefreshItem() {
if (itemList != null) {
itemList.add(0, new ItemObject("refreshed two"));
itemList.add(0, new ItemObject("refreshed one"));
int insertPos = adapter.hasHeader() ? 1 : 0;
adapter.notifyItemRangeInserted(insertPos, 2);
if (!adapter.hasHeader()) {
recyclerView.smoothScrollToPosition(0);
}
onRefreshSucced("refresh succeed");
return;
}
onRefreshFailed("refresh failed");
}
private void addLoadItem() {
if (itemList != null) {
itemList.add(new ItemObject("loaded one"));
itemList.add(new ItemObject("loaded two"));
itemList.add(new ItemObject("loaded three"));
itemList.add(new ItemObject("loaded four"));
onLoadmoreSucced("load succeed");
adapter.notifyItemRangeInserted(itemList.size() - 1, 4);
return;
}
onLoadmoreFail("load failed");
}