Question

当我使用User类时，用户名和密码将保存在Cloud Firestore中，但时间戳为null。任何人都可以帮助解决此问题。

public class AccountFragment extends Fragment {

Timestamp timestamp;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

final User user = new User(timestamp);

公共类用户{

private String username;
private String password;
Timestamp timestamp;

public User() {
}

public User(String username, String password, Timestamp timestamp) {
    this.username = username;
    this.password = password;
    this.timestamp = timestamp;
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public Timestamp getTimestamp() {
    return timestamp;
}

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

}

请帮助。

Answer 1

是的，我找到了解决方案。其实我忘了初始化它。在下面添加行后，我的问题解决了。

timestamp = Timestamp.now（）;

使用以下对象后，时间戳记为null

1 个答案: