如何在Android中使用FieldValue.serverTimestamp（）来定制模型类 [英] how to use FieldValue.serverTimestamp() to custom model class in android

问题描述

我使用Firestore作为数据库，现在我想在用户注册时存储服务器时间戳。

来自Firestore文档

 映射< String，Object> updates = new HashMap<>（）; 
 updates.put（timestamp，FieldValue.serverTimestamp（））; 
 docRef.update（updates）
 .addOnCompleteListener（new OnCompleteListener< Void>（）{//  - } 
  

但是现在我想在我的模型类中使用这个时间戳。

  public class UserModel implements Serializable {
私有字符串名称; 
私有字符串uid; 
私有字符串电子邮件; 
私有字符串密码; 
私有长时间戳; 
 
公共long getTimestamp（）{
 return timestamp; 
} 
 
 public void setTimestamp（long timestamp）{
 this.timestamp = timestamp; 
} 
 
 public String getName（）{
 return name; 
} 
 $ b $ public void setName（String name）{
 this.name = name; 
 
 
 public String getUid（）{
 return uid; 
} 
 
 public void setUid（String uid）{
 this.uid = uid; 
} 
 
 public String getEmail（）{
回复邮件; 
} 
 
 public void setEmail（String email）{
 this.email = email; 
} 
 
 public String getPassword（）{
 return password; 
} 
 
 public void setPassword（String password）{
 this.password = password; 
 
 
 
 
 $ b我怎样才能做到这一点。 
请帮助我。
 
解决方案
经过大量研究，我找到了解决方案。 
 $ b 
  @ServerTimestamp 
 private日期时间戳; 
 $ b $ public Date getTimestamp（）{
 return timestamp; 
} 
 public void setTimestamp（Date timestamp）{
 this.timestamp = timestamp; 
} 
  
当调用这个类时
 
 
  UserModel userModel = new UserModel（）; 
 userModel.setEmail（email）; 
 userModel.setPassword（password）; 
 userModel.setName（name）; 
 userModel.setUid（uid）; 
 
 insertUserDataToFireStore（userModel）; 
  
这是我找到解决方案的链接
 点击这里 
 
I am using Firestore as a database and now i want to store server timestamp when user register.

from the Firestore doc 
  Map<String,Object> updates = new HashMap<>();
  updates.put("timestamp", FieldValue.serverTimestamp());
  docRef.update(updates)
  .addOnCompleteListener(new OnCompleteListener<Void>() {  //-- }
But now i want this time stamp in my model class.
public class UserModel implements Serializable {
    private String name;
    private String uid;
    private String email;
    private String password;
    private long timestamp;

    public long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(long timestamp) {
        this.timestamp = timestamp;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUid() {
        return uid;
    }

    public void setUid(String uid) {
        this.uid = uid;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}
how can i achieve this. 
Please help me.
解决方案
After lots of research i found a solution for this.
 @ServerTimestamp
 private Date timestamp;

 public Date getTimestamp() {
     return timestamp;
 }
 public void setTimestamp(Date timestamp) {
        this.timestamp = timestamp;
 }
and when calling this class
UserModel userModel = new UserModel();
userModel.setEmail(email);
userModel.setPassword(password);
userModel.setName(name);
userModel.setUid(uid);

insertUserDataToFireStore(userModel); 
This is the link where i found the solution
Click here

                        
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