使用TreeMap <double，list <string =“”>＆gt;

Question

我想要对基于键的值进行排序所以我使用了TreeMap，它给出了排序键，但我想根据键对键和值进行排序。 这里键为Double，值为Array-list。

MainActivity.java

public void getExpandableListData() {
        Cursor cursor = databaseHelper.getLoadMoreData(count);
        cursor.moveToFirst();
        String businessName;
        String latitude;
        String longitude;
        String categoryDescription;
        double difference;
        do {
            TreeMap<Double, List<ChildInfo>> treeMapLocationDifference;
            treeMapLocationDifference = new TreeMap<Double, List<ChildInfo>>();
            categoryDescription = cursor.getString(cursor
                    .getColumnIndex("categorydesc"));
            int categoryId = cursor.getInt(cursor.getColumnIndex("CategoryId"));
            listDataHeader.add(categoryDescription);
            List<ChildInfo> childList = new ArrayList<ChildInfo>();
            Cursor cursorChild = databaseHelper.getChildData(categoryId);
            Map.Entry<Double, List<ChildInfo>> entry;
            List<ChildInfo> list = null;
            cursorChild.moveToFirst();
            do {
                businessName = cursorChild.getString(cursorChild
                        .getColumnIndex("BusinessName"));
                phoneNumber = cursorChild.getString(cursorChild
                        .getColumnIndex("Phone"));
                categoryDescription = cursorChild.getString(cursorChild
                        .getColumnIndex("categorydesc"));
                latitude = cursorChild.getString(cursorChild
                .getColumnIndex("Latitude"));
                longitude = cursorChild.getString(cursorChild
                        .getColumnIndex("Longitude"));
                ChildInfo childInfo = new ChildInfo(businessName, phoneNumber,
                        categoryDescription, latitude, longitude);
                childList.add(childInfo);
                currentLocation = new Location("");
                currentLocation.setLatitude(18.5522);
                currentLocation.setLongitude(73.8956);
                Location savedLocation = new Location("databaseLocation");
                savedLocation.setLatitude(Double.parseDouble(latitude));
                savedLocation.setLongitude(Double.parseDouble(longitude));
                difference = currentLocation.distanceTo(savedLocation) * (0.001);
                treeMapLocationDifference.put(difference, childList);
                entry = treeMapLocationDifference.entrySet().iterator().next();
                list = new ArrayList<ChildInfo>();
                list = entry.getValue();
                listDataChild.put(categoryDescription, list);
            } while (cursorChild.moveToNext());
        } while (cursor.moveToNext());
        cursor.close();
    } 

这里我使用了Tree-map，我希望这个按照键和它对应的值排序的树图，然后我将这个值赋给hash-map的值，该值应该被排序。