private static final ArrayList <ContentValues> tmain = new ArrayList<ContentValues>();

ContentValues fieldtmain = new ContentValues();

fieldtmain.put("cal_ride", "Краснодар(Виктор)");
fieldtmain.put("cal_start","1306506600");
fieldtmain.put("cal_date","Mon Mar 02 06:00:00 GMT+00:00 2015");
fieldtmain.put("cal_description","Работа в офисе");
fieldtmain.put("n_family", "[Иванов, Петров, Сидоров]");

tmain.add(fieldtmain);

for (int i=0;i<tmain.size();i++) {
                    Long min = tmain.get(i).getAsLong("cal_start");
                    for (int j = i + 1; j < tmain.size(); j++) {
                        if (min > tmain.get(j).getAsLong("cal_start")) {
                            min = tmain.get(j).getAsLong("cal_start");
                            ContentValues cvmin = tmain.get(j);
                            tmain.set(j, tmain.get(i));
                            tmain.set(i, cvmin);
                        }
                    }

// Collections.sort(…)
List<ObjectName> list = new ArrayList<ObjectName>();
Collections.sort(list, new Comparator<ObjectName>() {
        public int compare(ObjectName o1, ObjectName o2) {
                return o1.toString().compareTo(o2.toString());
        }
});

                List<ContentValues> list = new ArrayList<ContentValues>(tmain);
                Collections.sort(list, new Comparator<ContentValues>() {
                    public int compare(ContentValues o1, ContentValues o2) {
                        return o1.getAsLong("cal_start").compareTo(o2.getAsLong("cal_start"));
                    }
                });

                Collections.sort(tmain, new Comparator<ContentValues>() {
                    public int compare(ContentValues o1, ContentValues o2) {
                        return o1.getAsLong("cal_start").compareTo(o2.getAsLong("cal_start"));
                    }
                });