提交更改时，Realm会自动对列表进行排序

Question

我正在制作一个示例领域应用程序以获得乐趣。领域版本：0.88.2

我遇到的问题是每次我尝试修改我的元素时，我的排序设置都会自动消失。

这是我的步骤： 我有一个歌曲列表。

1. 我按id ASC排序歌曲
2. 我点击一个项目，然后该元素的int计数器（不是id）将递增。我提交了交易
3. 一切都很好。
4. 我按id DSC
排序歌曲
5. 我点击一个项目，然后该元素的int计数器（不是id）将递增。我提交了交易
6. 整个列表再次由id ASC排序，这是不期望的。我调试了我写的所有内容，没有关于排序的执行。

代码如下：

MainActivity：

public class MainActivity extends AppCompatActivity implements OnClickInterface {
    @Bind(R.id.tool_bar)
    Toolbar toolBar;
    @Bind(R.id.list)
    ListView list;
    private Realm realm;
    boolean isChecked = false;
    RealmListviewAdapter adapter;
    boolean sort = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        setSupportActionBar(toolBar);
        realm = Realm.getDefaultInstance();
        adapter = new RealmListviewAdapter(this, null, true);
        adapter.setListener(this);
        list.setAdapter(adapter);
        if (isChecked) {
            updateAllSongs();
        } else {
            realm.where(Song.class).findFirstAsync().asObservable()
                    .filter(new Func1<RealmObject, Boolean>() {
                        @Override
                        public Boolean call(RealmObject realmObject) {
                            return realmObject.isLoaded();
                        }
                    })
                    .first()
                    .subscribeOn(AndroidSchedulers.mainThread())
                    .subscribe(new Action1<RealmObject>() {
                        @Override
                        public void call(RealmObject realmObject) {
                            if (!realmObject.isValid()) {
                                addUsers();
                            } else {
                                updateAllSongs();
                            }
                        }
                    });
            isChecked = true;
        }
    }

    @OnClick(R.id.tool_bar)
    public void onClickToolbar() {
        if (sort) {
            adapter.getRealmResults().sort("_id");
        } else {
            adapter.getRealmResults().sort("_id", Sort.DESCENDING);
        }
        sort = !sort;
        adapter.notifyDataSetChanged();
    }

    private void addUsers() {
        realm.executeTransactionAsync(new Realm.Transaction() {
            @Override
            public void execute(Realm realm) {
                String[] titles = getResources().getStringArray(R.array.song_titles);
                for (int i = 0; i < titles.length; i++) {
                    Song song = new Song();
                    song.set_id(i);
                    song.set_trackNumber(i + 1);
                    song.set_title(titles[i]);
                    song.set_favorite(false);
                    song.set_frequency(0);
                    song.set_lyrics("");
                    song.set_downloaded(false);
                    realm.copyToRealm(song);
                }
            }
        }, new Realm.Transaction.OnSuccess() {
            @Override
            public void onSuccess() {
                updateAllSongs();
            }
        });
    }

    private void updateAllSongs() {
        realm.where(Song.class).findAllSortedAsync("_id").asObservable()
                .filter(new Func1<RealmResults<Song>, Boolean>() {
                    @Override
                    public Boolean call(RealmResults<Song> songs) {
                        return songs.isLoaded();
                    }
                })
                .first()
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1<RealmResults<Song>>() {
                    @Override
                    public void call(RealmResults<Song> songs) {
                        adapter.updateRealmResults(songs);
                    }
                });
    }

    @Override
    public void onClickedItem(int position) {
        System.out.println("Pressed position " + position);
        Song song = adapter.getRealmResults().get(position);
        realm.beginTransaction();
        Log.d("frequency", String.valueOf(song.get_frequency()));
        song.set_frequency(song.get_frequency() + 1);
        realm.commitTransaction();
        Log.d("frequency", String.valueOf(song.get_frequency()));
        //Log.d("frequency", String.valueOf(_data.get(position).get_frequency()));
    }
}

我的适配器：

public class RealmListviewAdapter extends RealmBaseAdapter<Song> implements ListAdapter{
    private OnClickInterface _listener;

    public RealmListviewAdapter(Context context, RealmResults<Song> realmResults, boolean automaticUpdate) {
        super(context, realmResults, automaticUpdate);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        SongViewHolder viewHolder;
        if (convertView == null) {
            convertView = inflater.inflate(R.layout.eachsong, parent, false);
            viewHolder = new SongViewHolder(convertView);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (SongViewHolder) convertView.getTag();
        }
        Song song = realmResults.get(position);
        viewHolder.track.setText(String.valueOf(song.get_trackNumber()));
        viewHolder.title.setText(song.get_title());
        viewHolder.position = position;
        return convertView;
    }

    public void updateRealmResults(RealmResults<Song> queryResults) {
        super.updateRealmResults(queryResults);
        Log.d("Adapter", "UpdateRealmResults is called");
    }

    public RealmResults<Song> getRealmResults() {
        return realmResults;
    }

    public void setListener(OnClickInterface listener) {
        _listener = listener;
    }

    class SongViewHolder{
        @Bind(R.id.tracknumber)
        TextView track;
        @Bind(R.id.title)
        TextView title;
        @Bind(R.id.freq)
        TextView freq;
        @Bind(R.id.fav_star)
        ImageView fav;
        int position;

        public SongViewHolder(View itemView) {
            ButterKnife.bind(this, itemView);
        }

        @OnClick(R.id.item_row)
        public void onClickItem() {
            _listener.onClickedItem(position);
        }
    }
}

请帮我解决这个问题。非常感谢你。