java - ANDing，嵌套查询解析服务器android

Question

我试图从解析服务器获取一个或多个具有特定年龄、来自特定城市和特定性别的用户，但此代码返回所有年龄为“20”、城市为“纽约”的用户, 性别=“女性”

public void sendQuery() {
        String ages1 = SharedPrefsActivity.n;
        String cities = SharedPrefsActivity.ph;
        String genders = SharedPrefsActivity.e;
        ParseQuery<ParseObject> ages =ParseQuery.getQuery("UserImages");
        ages.whereEqualTo("age", ages1 );

         ParseQuery<ParseObject> city1 = ParseQuery.getQuery("UserImages");
         city1.whereMatchesKeyInQuery("city", cities , ages);

         final ParseQuery<ParseObject> gender1 = ParseQuery.getQuery("UserImages");
         gender1.whereMatchesKeyInQuery("gender", genders, city1);

         gender1.findInBackground(new FindCallback<ParseObject>() {
            public void done(List<ParseObject> results, ParseException e) {
                for (ParseObject gender : results) {
                    Object name = gender.get("name");
                    ParseFile image = (ParseFile) gender.get("ImageFile");
                    Usernames.add(((Object) name).toString());
                    imageUrls.add(((ParseFile) image).getUrl().toString());

                }

            }
        });

    }

Answer 1

AND 是通过将多个条件应用于单个查询来实现的:

ParseQuery<ParseObject> query =ParseQuery.getQuery("UserImages");

query.whereEqualTo("age", ages1 );
query.whereEqualTo("city", cities );
query.whereEqualTo("gender", genders );

query.findInBackground( ...