Question

我正在尝试计算我的解析数据库中的用户数，并将其作为计数器传递给我的滑动菜单。但是，它总是返回null（我在解析用户db中有超过100个用户）。我在滑动菜单中的代码如下：

有什么想法吗？

countuser = 0;
        ParseQuery<ParseUser> query = ParseUser.getQuery();
        query.findInBackground(new FindCallback<ParseUser>() {

            @Override
            public void done(List<ParseUser> users, ParseException e) {
                if (e == null) {
                    // Success
                    mUsers = users;


                    countuser = mUsers.size();

                }

            }
        });

我想将反对者传递给我的导航项目：

navDrawerItems.add(new NavDrawerItem(navMenuTitles[3], navMenuIcons
                .getResourceId(3, -1), true, "("+ countuser +")"));

Answer 1

Android, Queries, Counting Objects下的文档中介绍了这一点。

ParseQuery<ParseUser> query = ParseUser.getQuery();
// set any filters...

query.countInBackground(new CountCallback() {
    public void done(int count, ParseException e) {
        if (e == null) {
            // all good
            countuser = count;
        }
    }
});

Answer 2

万一有人来这里
在新的解析服务器中，您可以尝试以下操作：

   -p, --preserve-merges
       Recreate merge commits instead of flattening the history by replaying commits a
       merge commit introduces. Merge conflict resolutions or manual amendments to merge
       commits are not preserved.

       This uses the --interactive machinery internally, but combining it with the
       --interactive option explicitly is generally not a good idea unless you know what
       you are doing (see BUGS below).

ParseQuery<ParseObject> query = ParseQuery.getQuery("GameScore"); query.whereEqualTo("playerName", "Dan Stemkoski"); query.findInBackground(new FindCallback<ParseObject>() { public void done(List<ParseObject> scoreList, ParseException e) { if (e == null) { Log.d("score", "Retrieved " + scoreList.size() + " scores"); } else { Log.d("score", "Error: " + e.getMessage()); } } });返回计数

解析用户的计数数返回null

2 个答案: