Java 如何在firebase数据库android中存储对象的arraylist

我有一个用于创建组的模型Cals

public class GroupModel {
    String groupId, groupName;
    ArrayList<GroupMember> groupMembersList;

    public GroupModel(String groupId, String groupName, ArrayList<GroupMember> groupMembersList) {
        this.groupId = groupId;
        this.groupName = groupName;
        this.groupMembersList = groupMembersList;
    }

    public String getGroupId() {
        return groupId;
    }

    public void setGroupId(String groupId) {
        this.groupId = groupId;
    }

    public String getGroupName() {
        return groupName;
    }

    public void setGroupName(String groupName) {
        this.groupName = groupName;
    }
}

其中，groupModel是上述给定的groupModel类的对象

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请推荐我，因为我是firebase的新手。

你没有数组列表的setter和getter

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…参考此链接-

Add

GroupMember

classmodel类中是否有setter和getter方法，因为我使用构造函数初始化groupModel

mdDatabaseReference
                .child(getResources().getString(R.string.group_list_child_key))
                .setValue(groupModel).addOnCompleteListener(task -> {//multiple informations in with same user(instertion will add new information)
            {
                if (task.isSuccessful()) {
                    Toast.makeText(this, "Group Created", Toast.LENGTH_SHORT).show();
                    Utils.hideProgress();
                } else {
                    Toast.makeText(this, task.getException().toString(), Toast.LENGTH_LONG).show();
                    Utils.hideProgress();
                }
            }
        });