我正在使用firebase的实时数据库，以便在androidstudio中制作一个菜谱应用程序。代码运行良好，没有崩溃，但每次它应该发送信息到数据库，它没有。我试图为它创建一个shell，以便将数据放入其中，相反，我看到它一旦通过了应该发送数据的部分，就会将其删除。我已经根据它们的文档完成了所有必需的导入、实现和依赖项，也根据它们编写了代码，但似乎不起作用。
发送数据前的firebase实时数据库，以及规则屏幕截图：
之前的firebase rd
firebase rd规则
在它运行了发送数据的逻辑之后，我看到它变红并且消失了，就像它被删除了一样，什么也没有留下。
这是我的homescreen.java代码：

package com.capteamfour.recipeappdatabase;

import android.content.Intent;
import android.os.Bundle;

import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.auth.FirebaseUser;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;

import androidx.appcompat.app.AppCompatActivity;

import android.view.View;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;

public class HomeScreen extends AppCompatActivity {

final FirebaseDatabase mDatabase = FirebaseDatabase.getInstance();
DatabaseReference mDatabaseUsers = mDatabase.getReference("USERS");

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home_screen);

    newUser(FirebaseAuth.getInstance().getCurrentUser().getDisplayName(),
            FirebaseAuth.getInstance().getCurrentUser().getEmail());

    String username = FirebaseAuth.getInstance().getCurrentUser().getDisplayName();
    String email = FirebaseAuth.getInstance().getCurrentUser().getEmail();

    TextView userWelcome = (TextView) findViewById(R.id.userWelcome);
    FloatingActionButton addRecipe = (FloatingActionButton) findViewById(R.id.addRecipeButton);
    ImageButton userProfile = (ImageButton) findViewById(R.id.userProfileButton);

    // Welcomes the current user
    userWelcome.setText("Welcome, " + username + "!");

    // Creates a listener for the "add recipe" button; takes user to recipe form activity
    addRecipe.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent toRecipeForm = new Intent(HomeScreen.this, recipeForm.class);
            startActivity(toRecipeForm);
        }
    });

    // Creates a listener for the "user Profile Button" button; takes user to profile activity
    userProfile.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent ToProfile = new Intent(HomeScreen.this, Profile.class);
            startActivity(ToProfile);
        }
    });

    }

public void newUser(String name, String email)
{
    userProfile user = new userProfile(name, email);

    System.out.println("This is what I need to send: " + mDatabaseUsers.setValue(user));
    mDatabaseUsers.setValue(user);
}

}
我声明一个数据库示例并创建一个对users路径的引用作为全局变量，然后生成一个函数newuser（string name，string email），它为我创建了一个userprofile（）类的示例，然后应该使用下一行将它发送到数据库（sys.out让我尝试查看它试图发送的内容，如果有任何内容的话）。
用户配置文件类代码：

package com.capteamfour.recipeappdatabase;

import com.google.firebase.database.IgnoreExtraProperties;

import java.util.ArrayList;
import java.util.List;

@IgnoreExtraProperties
public class userProfile {

private String username;
private String email;
private List<Recipe> subRecipes = new ArrayList<>();

// Not yet implemented
private List<Recipe> favRecipes = new ArrayList<>();
private List<Recipe> savedRecipes = new ArrayList<>();

// A user profile will include their name, the recipes they've submitted, as well as recipes they've
// favorited or saved to their profile. Saved recipes are private to the user.

public userProfile() {
    // Default constructor for DataSnapshot.getValue(userProfile.class) calls
}

public userProfile(String usernameIn, String emailIn)
{
    this.username = username;
    this.email = email;
}

public String getUsername () {
    return this.username;
}

public String getEmail() {
    return this.email;
}

/*
    Each of these add functions will check the length of the given array and either
    add to the end of it if there's already results, or just adds it on the empty array.

    Example: array empty, then array[0] = recipe
             array has values, then array[length + 1] = recipe
 */

public void addSubRecipe (Recipe recipe) {
    int size = this.subRecipes.size();
    if (size == 0) {
        subRecipes.add(recipe);
    }
    else {
        subRecipes.add(size+1, recipe);
    }
}

public List<Recipe> getSubRecipes() {
    return subRecipes.subList(0, (subRecipes.size()));
}
/*
These are commented out to prevent additional bugs and confusion while they're not implemented

public void addSavedRecipe (Recipe recipe) {
    int size = this.savedRecipes.size();
    if (size == 0) {
        savedRecipes.add(recipe);
    }
    else {
        savedRecipes.add(size + 1, recipe);
    }
}

    public List<Recipe> getSavedRecipes() {
    return this.savedRecipes.subList(0, (subRecipes.size() + 1));
    }

/*public void addFavRecipe (Recipe recipe) {
    int size = this.favRecipes.size();
    if (size == 0) {
        favRecipes.add(recipe);
    }
    else {
        favRecipes.add(size + 1, recipe);
    }
}

public List<Recipe> getFavRecipes() {
    return this.favRecipes.subList(0, (subRecipes.size() + 1));
}*/

}
在这个类中，我确保有一个带有额外构造函数的空构造函数和常见的get/set函数，以便数据库可以使用它。
我很感激任何人能提供的关于如何解决这个问题的建议。这是为我的大学顶点课程，它是举行了我们相当激烈的什么似乎没有什么好的理由。谢谢大家。