Java 如何从firestore中的文档中获取特定数据并将其传递给android中的局部变量

我希望将存储在firestore文档中的模型中的数据获取到局部变量

这是我的员工模型。类

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还有我的Firestore截图，请帮忙！谢谢

您缺少的是从文档中获取模型

if(documentSnapshot.exists()){
    EmployeeModel model = documentSnapshot.toObject(EmployeeModel.class);
    //

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只需将

if语句

后的一行添加到现有代码中，其余的就可以了。

请将您的数据库结构添加为屏幕截图，并添加

EmployeeModel

类的内容。如果这样做有效，请接受答案并向上投票itString username=model.getUsername（）；

public class EmployeeModel {
public static final String MFIELD_USERNAME = "username";
public static final String MFIELD_EMAIL = "email";
public static final String MFIELD_PASSWORD = "password";
public static final String MFIELD_LOCATION = "location";
public static final String MFIELD_PHONENUMBER = "phonenumber";
public static final String MFIELD_GENDER = "gender";
public static final String MFIELD_TYPE = "type";

private String username;
private String email;
private String password;
private String location;
private String phonenumber;
private String gender;
private String type;
private @ServerTimestamp Date timestamp;

public EmployeeModel() {
    // Default constructor required for calls to DataSnapshot.getValue(User.class)
}

public EmployeeModel(String username, String email, String password, String location, String phonenumber, String gender, String type, Date timestamp) {
    this.username = username;
    this.email = email;
    this.password = password;
    this.location = location;
    this.phonenumber = phonenumber;
    this.gender = gender;
    this.type = type;
    this.timestamp = timestamp;
}

public String getUsername() {
    return username;
}

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

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;
}

public String getLocation() {
    return location;
}

public void setLocation(String location) {
    this.location = location;
}

public String getPhonenumber() {
    return phonenumber;
}

public void setPhonenumber(String phonenumber) {
    this.phonenumber = phonenumber;
}

public String getGender() {
    return gender;
}

public void setGender(String gender) {
    this.gender = gender;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

public Date getTimestamp() {
    return timestamp;
}

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

if(documentSnapshot.exists()){
    EmployeeModel model = documentSnapshot.toObject(EmployeeModel.class);
    //