java– 将类保存到firebase

概述我的班级是CredicardinfoObject.classpublic class CreditcardinfoOjbect implements Serializable { private static final long serialVersionUID = 1L; public static String title;

我的班级是CredicardinfoObject.class

public class CreditcardinfoOjbect implements Serializable {    private static final long serialVersionUID = 1L;    public static String Title;    public static String startTime;    public static String endTime;    public static String day;}

这个类只有静态的特性.没有实例化需要.

在我的mainActivity.class中,我想设置类的值,然后存储此firebase数据库.这是我的mainActivity.class.

    CreditcardinfoOjbect.Title = "foo";    CreditcardinfoOjbect.startTime = "bar";    CreditcardinfoOjbect.day = "1";    CreditcardinfoOjbect.endTime = "2";    final FirebaseDatabase database = FirebaseDatabase.getInstance();    String uID = "";    FirebaseAuth auth = FirebaseAuth.getInstance();    FirebaseUser user = auth.getCurrentUser();    if (user != null) {        uID = user.getUID();    }    DatabaseReference ref = database.getReference("users").child(uID).child("account").child("creditcards");    HashMap

不幸的是,这不起作用.如何在Firebase中存储类的当前值？最佳答案首先,您需要添加到您的pojo类,Firebase需要的无参数构造,以及每个字段的公共setter和公共getter,如下所示：

public class CreditCardInfoObject implements Serializable {    private String Title;    privat eString startTime;    private String endTime;    private String day;    public CreditCardInfoObject() {}    public String getTitle() {return Title;}    public voID setTitle(String Title) {this.Title = Title;}    public String getStartTime() {return startTime;}    public voID setStartTime(String startTime) {this.startTime = startTime;}    public String getEndTime() {return endTime;}    public voID setEndTime(String endTime) {this.endTime = endTime;}    public String getDay() {return day;}    public voID setDay(String day) {this.day = day;}}

请注意,您不需要静态字段.另请注意,我将您的所有字段设置为私有.将这些字段设置为公共字段是一种非常糟糕的做法.

现在,要设置pojo类的值,需要创建CreditCardInfoObject类的新对象并使用公共setter.拥有此新对象后,您可以将其保存到Firebase数据库,如下所示：

CreditcardinfoOjbect obj = new CreditcardinfoOjbect();obj.setTitle("foo");obj.setStartTime("bar");obj.setEndTime("1");obj.setDay("2");DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference();String uID = "";FirebaseAuth auth = FirebaseAuth.getInstance();FirebaseUser user = auth.getCurrentUser();if (user != null) {    uID = user.getUID();}DatabaseReference ref = rootRef.child("users").child(uID).child("account").child("creditcards");ref.setValue(obj);

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