领域查询每个用户的最新记录

Question

如何在领域java中完成类似的查询，就像在这个问题中提到的那样： how do I query sql for a latest record date for each user 因为在获取查询时，似乎领域缺少group by方法

这是我的RealmObject：

Button button = (Button) findViewById(R.id.yourButton);

button.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View v, MotionEvent event) {

        // adjust the scale and duration values according to your needs

        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            v.animate().scaleX(2).scaleY(2).setDuration(2000);
        } else if (event.getAction() == MotionEvent.ACTION_UP) {
            v.animate().scaleX(1).scaleY(1).setDuration(2000);
        }
        return false;
    }
});

这代表用户：

public class Memo extends RealmObject {
    @Ignore
    public static final int SENT = 1;
    @Ignore
    public static final int UNREAD = 2;
    @Ignore
    public static final int READ = 3;
    @Ignore
    public static final int PENDING = 4;
    private static final String TAG = Memo.class.getName();
    @PrimaryKey
    public String id = "";
    @Index
    public String connection = "";
    public String subject = "";
    public String body = "";
    public int status = 0;
    public Date date;
    public Boolean sentByMe = false;
    public String remoteId = "";
    public Boolean isFile = false;
    public String filepath = "";
}

Answer 1

RealmResults<Memo> latestMemos = realm.where(Memo.class)
                                      .findAllSorted("date", Sort.DESCENDING)
                                      .distinct("connection");