Question

我将自定义对象推送到firebase时遇到了一个非常小的问题。我试图解释这个问题所以帖子可能很长。我将尝试清理代码，以便只保留与问题相关的代码。请在阅读我的问题时保持耐心：）

我正在尝试创建一个小计划，然后当用户按下Save Button时，我将此计划推送到firebase。我创建了以下名为Schedule的自定义对象，其中Alarm分别包含AlarmTimings和AlarmDow个对象。我认为通过以下代码会更清楚。

Schedule.class

@IgnoreExtraProperties
public class Schedule {
    private String scheduleName;
    private String description;
    private Alarm alarm;

    public Schedule() {}

    public Schedule(String scheduleName, String description, Alarm alarm) {
        this.scheduleName = scheduleName;
        this.description = description;
        this.alarm = alarm;
    }
    // Setters and Getters
    @Exclude
    public Map<String, Object> toMapSchedule() {
        HashMap<String, Object> result = new HashMap<>();
        result.put("scheduleName", scheduleName);
        result.put("description", description);
        result.put("alarm", alarm);
        return result;
    }

}

上面的类有Alarm Object。

@IgnoreExtraProperties
public class Alarm {
    private int date;
    private int month;
    private int year;
    private AlarmTiming alarmTiming;
    private AlarmDow alarmDow;

    public Alarm() {}

    public Alarm(int date, int month, int year, AlarmTiming alarmTiming, AlarmDow alarmDow) {
        this.date = date;
        this.month = month;
        this.year = year;
        this.alarmTiming = alarmTiming;
        this.alarmDow = alarmDow;
    }
    //Setters and Getters

    @Exclude
    public Map<String, Object> toMapAlarm() {
        HashMap<String, Object> result = new HashMap<>();
        result.put("date", date);
        result.put("month", month);
        result.put("year", year);
        result.put("alarmTiming", alarmTiming);
        result.put("alarmDow", alarmDow);
        return result;
    }
}

警报类依次对象为AlarmTimings和AlarmDow。

@IgnoreExtraProperties
public class AlarmDow {
    private int sunday, monday, tuesday, wednesday, thursday, friday, saturday, alldays;

    public AlarmDow() {}

    public AlarmDow(int sunday, int monday, int tuesday, int wednesday, int thursday, int friday, int saturday, int alldays) {
        this.sunday = sunday;
        this.monday = monday;
        this.tuesday = tuesday;
        this.wednesday = wednesday;
        this.thursday = thursday;
        this.friday = friday;
        this.saturday = saturday;
        this.alldays = alldays;
    }
    //Setters and Getters
    @Exclude
    public Map<String, Object> toMapAlarmDow() {
        HashMap<String, Object> result = new HashMap<>();
        result.put("sunday", sunday);
        result.put("monday", monday);
        result.put("tuesday", tuesday);
        result.put("wednesday", wednesday);
        result.put("thursday", thursday);
        result.put("friday", friday);
        result.put("saturday", saturday);
        result.put("alldays", alldays);
        return result;
    }
}

@IgnoreExtraProperties
public class AlarmTiming {
    private int hour1;
    private int minute1;

    private int hour2;
    private int minute2;

    private int hour3;
    private int minute3;

    private int intervalHour;

    public AlarmTiming() {}

    public AlarmTiming(int hour1, int minute1, int hour2, int minute2, int hour3, int minute3, int intervalHour) {
        this.hour1 = hour1;
        this.minute1 = minute1;
        this.hour2 = hour2;
        this.minute2 = minute2;
        this.hour3 = hour3;
        this.minute3 = minute3;
        this.intervalHour = intervalHour;
    }
    //Normal Setters and Getters
    @Exclude
    public Map<String, Object> toMapAlarmTiming() {
        HashMap<String, Object> result = new HashMap<>();
        result.put("hour1", hour1);
        result.put("minute1", minute1);
        result.put("hour2", hour2);
        result.put("minute2", minute2);
        result.put("hour3", hour3);
        result.put("minute3", minute3);
        result.put("intervalHour", intervalHour);
        return result;
    }
}

问题： 我保留构造函数的原因是因为在我的片段的onCreate()中我可以将它们初始化为0作为默认值，然后当用户在填充日程表时选择某些内容时，对象获取属性得到设置。如下所示：

 @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        alarmDow=new AlarmDow(0,0,0,0,0,0,0,0);
        alarmTiming= new AlarmTiming(0,0,0,0,0,0,0);
        alarm= new Alarm(0,0,0,alarmTiming,alarmDow);
        schedule= new Schedule("Null","Null",alarm);
    }

现在用户按下保存按钮。我正在做这样的事情：

    alarm.setAlarmTiming(alarmTiming);
    alarm.setAlarmDow(alarmDow);
    schedule.setAlarm(alarm);
 mRef.child("DailySchedules").child(taskNameEditText.getText().toString())
            .setValue(schedule);

现在按下保存时不会弹出任何错误。但它不起作用。什么都没有发布到Firebase，我的应用程序也没有崩溃。任何建议：）

Answer 1

为了将Java对象序列化为Firebase，他们应该：

表现得像JavaBeans。这意味着他们为您要序列化的每个字段都有正确命名的公共getter和setter。
或者使用公共字段来序列化所有数据。

现在，您的对象只包含私有字段，并且没有getter和setter。这意味着Firebase无法正确地对您的类进行内省，以确定要序列化的字段。

将自定义对象写入Firebase数据库

1 个答案: