private void handleMsgPost() {
if (Utils.isListEmpty(msgPosts)) return;
// Collections.sort(msgPosts, mComparator);
nextPage++;
mMsgAdapter.appendPostsToTail(msgPosts);
showMoreCachedResultsFromAdapter();
// the server may return less than required item
// if (msgPosts.size() < Constants.MESSAGE_REQUEST_NUM_FROM_INTERNET) isNoMorePosts = true;
}
@SuppressWarnings("unchecked")
@Override
public void networkCallback(Object jsonResult, int httpCode, int requestTag) {
if (mActivity == null) return;
JsonData<ListJsonData> jResult = (JsonData<ListJsonData>) jsonResult;
if (httpCode == HttpStatus.SC_FORBIDDEN) {
((AppApplication) mActivity.getApplication()).userNotLogin();
return;
}
if (httpCode != HttpStatus.SC_OK) {
Log.e("Volley", "HTTP Code " + httpCode + " catched in callback!!");
String toastString;
if (httpCode == HttpStatus.SC_CONFLICT) {
toastString = mActivity.getString(R.string.parse_data_failed);
} else if (httpCode == HttpStatus.SC_INTERNAL_SERVER_ERROR) {
toastString = getString(R.string.error_occur_retry_later);
} else toastString = mActivity.getString(R.string.connect_to_server_failed);
ToastTools.toastWithFrequencyLimited(mActivity, toastString, Toast.LENGTH_SHORT, true);
return;
}
Log.d("Volley", "JsonData apiVersion: " + jResult.getApiVersion());
if (jResult.getCode() != Constants.CODE_SUCCESS) {
Log.e("Volley", jResult.getMessage() == null ? "" : jResult.getMessage());
ToastTools.toastWithFrequencyLimited(
mActivity, jResult.getMessage(), Toast.LENGTH_SHORT, true);
return;
}
if (jResult.getData().size() == 0) {
isNoMorePosts = true;
// ToastTools.toast(getActivity(), getString(R.string.no_more_message_notice),
// Toast.LENGTH_SHORT).show();
return;
}
if (requestTag == REQUEST_LATEST_COMMENTED_AND_LIKES) {
List<PostMessage> msgs = jResult.getData().getPostMsgList();
mMsgAdapter.clearAllComments();
if (!Utils.isListEmpty(msgs)) msgPosts.addAll(msgs);
handleMsgPost();
} else if (requestTag == REQUEST_PREVIOUS_COMMENTED_AND_LIKES) {
List<PostMessage> msgs = jResult.getData().getPostMsgList();
if (!Utils.isListEmpty(msgs)) msgPosts.addAll(msgs);
handleMsgPost();
}
}
private void showMoreCachedResultsFromAdapter() {
boolean isMoreCachedCanBeShown =
mMsgAdapter.showMoreCachedResult(); // already notified data changes
if (!isMoreCachedCanBeShown) {
if (isNoMorePosts) {
if (!isFooterShow) {
mMsgListView.addFooterView(footerView);
isFooterShow = true;
}
} else {
getPreviousPostsFromInternet();
}
}
}
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_msg_comment, null);
mMsgListView = (ListView) view.findViewById(R.id.msg_comment_list);
mMsgAdapter = new MsgPostAdapter(getActivity(), null, this);
mMsgAdapter.notifyDataSetChanged();
getLatestPostsFromInternet();
mMsgListView.setOnItemClickListener(this);
mMsgListView.setOnScrollListener(
new OnScrollListener() {
int preLastPos = -1;
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (scrollState == SCROLL_STATE_TOUCH_SCROLL) return;
// 上拉判断一定要在下拉之前，否则数据量不足一屏幕的时候会有问题
int curLastPos = view.getLastVisiblePosition();
if (curLastPos >= view.getCount() - 1 && curLastPos != preLastPos) {
Log.d("FirstPageFragment", "上拉加载更多----");
preLastPos = curLastPos; // 避免多次触发
showMoreCachedResultsFromAdapter();
}
Log.d("FirstPageFragment", "lastVisiblePosition: " + view.getLastVisiblePosition());
Log.d("FirstPageFragment", "view.getCount - 1: " + (view.getCount() - 1));
}
@Override
public void onScroll(
AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {}
});
footerView = View.inflate(getActivity(), R.layout.listview_footer, null);
TextView textView = (TextView) footerView.findViewById(R.id.listview_footer_text);
textView.setText("没有更多消息了...");
footerView.setClickable(false);
mMsgListView.addHeaderView(View.inflate(getActivity(), R.layout.listview_header, null));
mMsgListView.setAdapter(mMsgAdapter);
return view;
}