如何使用Firebase中的List更新数据？

Question

Account.java

public class Account {
    private String _Phone;
    private String _IC;
    private String _FullName;
    private List<String> _CarPlate;

    public Account(){}

    public Account(String fullname, String phone, List<String> carplate, String IC)
    {
        this._Phone=phone;
        this._CarPlate=carplate;
        this._FullName=fullname;
        this._IC=IC;
    }
       public void set_CarPlate(List<String> CarPlate){this._CarPlate=_CarPlate;}

    public List<String> get_CarPlate(){return _CarPlate;}

    public void set_Phone(String _Phone) {
        this._Phone = _Phone;
    }

    public String get_Phone() {
        return _Phone;
    }

    public String get_IC() {
        return _IC;
    }

    public void set_IC(String _IC){this._IC=_IC;}

    public String get_FullName() {
        return _FullName;
    }

    public void set_FullName(String _FullName){ this._FullName=_FullName;}

根据我的理解，

ChangeEmailPassword.java

List<String> names=new ArrayList<>();
 changePhone.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            progressBar.setVisibility(View.VISIBLE);
            txtPhone = newPhone.getText().toString().trim();
            if (!txtPhone.equals("")) {
                mDatabase.child(user.getUid()).addValueEventListener(new ValueEventListener() {
                    @Override
                    public void onDataChange(DataSnapshot dataSnapshot) {
                        Account phoneAcc=new Account();

//从Firebase中检索所有数据                             Map map =（Map）dataSnapshot.getValue（）; //使用setter

将数据映射到Account.java进行封装

 phoneAcc.set_FullName(map.get("_FullName"));

//创建新的List对象，并将数据添加到从Firebase检索的列表中

names.add(map.get("_CarPlate"));
phoneAcc.set_CarPlate(names);
phoneAcc.set_IC(map.get("_IC"));
phoneAcc.set_Phone(txtPhone);

//再次将所有值添加到firebase中以覆盖旧数据

mDatabase.child(user.getUid()).setValue(phoneAcc);

为什么我无法获取列表数据？

当我两次更新电话号码时的另一个问题是，它会给我这样的结果：

[！[第二个结果] [3]] [3]

我的控制台的结果将是

I/Timeline: Timeline: Activity_launch_request time:63270425
I/Timeline: Timeline: Activity_launch_request time:63270472
I/Timeline: Timeline: Activity_launch_request time:63270520
I/Timeline: Timeline: Activity_launch_request time:63270576
I/Timeline: Timeline: Activity_launch_request time:63270638
I/Timeline: Timeline: Activity_launch_request time:63270680
                           .
                           .
                           .

不可阻挡的