Why is the chat list not showing (Android/FireBase)?

Question

Java

I decided to write a chat for Android, I started studying this course ( https://www.youtube.com/watch?v=gFtajvZajrg&t=1718s ), but it deals with an outdated version of FireBase.
The problem is that I set up the database and if I write and send a message in the chat, then it gets into the database, but visually it is not in the application, please tell me how to solve it.

Logcat error "2020-08-28 20:25:06.677 22284-22284/com.example.chatapp E/SpannableStringBuilder: SPAN_EXCLUSIVE_EXCLUSIVE spans cannot have a zero length"

MainActivity.java

package com.example.chatapp;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.firebase.ui.auth.AuthUI;
import com.firebase.ui.database.FirebaseListAdapter;
import com.firebase.ui.database.FirebaseListOptions;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;

import android.text.format.DateFormat;

import org.w3c.dom.Text;

public class MainActivity extends AppCompatActivity {

    private static int SING_IN_CODE = 1;
    private RelativeLayout activity_main;
    private FirebaseListAdapter<Message> adapter;
    private FloatingActionButton sendBtn;

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == SING_IN_CODE) {
            if (resultCode == RESULT_OK) {
                Snackbar.make(activity_main, "Вы авторизованы", Snackbar.LENGTH_LONG).show();
                displayAllMessages();
            } else {
                Snackbar.make(activity_main, "Вы не авторизованы", Snackbar.LENGTH_LONG).show();
                finish();
            }
        }
    }

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

        activity_main = findViewById(R.id.activity_main);
        sendBtn = findViewById(R.id.btnSend);
        sendBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                EditText textField = findViewById(R.id.messageField);
                if (textField.getText().toString() == "")
                    return;
                FirebaseDatabase.getInstance().getReference().push().setValue(
                        new Message(
                                FirebaseAuth.getInstance().getCurrentUser().getEmail(),
                                textField.getText().toString()
                        )
                );
                textField.setText("");
            }
        });

        //Пользователь не авторизован
        if (FirebaseAuth.getInstance().getCurrentUser() == null)
            startActivityForResult(AuthUI.getInstance().createSignInIntentBuilder().build(), SING_IN_CODE);
        else {
            Snackbar.make(activity_main, "Вы авторизованы", Snackbar.LENGTH_LONG).show();
            displayAllMessages();
        }
    }


    private void displayAllMessages() {

        ListView listOfMessage = findViewById(R.id.list_of_messages);

        Query query = FirebaseDatabase.getInstance().getReference().child("Message");
        FirebaseListOptions<Message> options =
                new FirebaseListOptions.Builder<Message>()
                        .setQuery(query ,Message.class)
                        .setLayout(R.layout.list_item)
                        .build();
        adapter = new FirebaseListAdapter<Message>(options) {
            @Override
            protected void populateView(@NonNull View v, @NonNull Message model, int position) {
                TextView mess_user, mess_time, mess_text;
                mess_user = v.findViewById(R.id.message_user);
                mess_time = v.findViewById(R.id.message_time);
                mess_text = v.findViewById(R.id.message_text);


                mess_user.setText(model.getUserName());
                mess_text.setText(model.getTextMessage());
                mess_time.setText(DateFormat.format("dd-mm-yyyy HH:mm:ss", model.getMessageTime()));

            }
        };
        listOfMessage.setAdapter(adapter);
    }
}

Message.java

package com.example.chatapp;

import java.util.Date;

public class Message {

    public String userName;
    public String textMessage;
    private long messageTime;

    public Message() {}
    public Message(String userName, String textMessage) {
        this.userName = userName;
        this.textMessage = textMessage;

        this.messageTime = new Date().getTime();
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getTextMessage() {
        return textMessage;
    }

    public void setTextMessage(String textMessage) {
        this.textMessage = textMessage;
    }

    public long getMessageTime() {
        return messageTime;
    }

    public void setMessageTime(long messageTime) {
        this.messageTime = messageTime;
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:id="@+id/activity_main">

    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/btnSend"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:src='@drawable/ic_send_button'
        android:tint="@android:color/white"
        android:layout_alignParentBottom="true"
        android:layout_alignParentEnd="true"
        android:layout_margin="25dp"
        />

    <com.google.android.material.textfield.TextInputLayout
        android:id="@+id/text_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentStart="true"
        android:layout_toStartOf="@id/btnSend"
        >
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:id="@+id/messageField"
            android:hint=" Введите сообщение"/>
    </com.google.android.material.textfield.TextInputLayout>

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_above="@+id/text_layout"
        android:id="@+id/list_of_messages"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:divider="@android:color/transparent"
        android:dividerHeight="16dp"
        android:layout_marginBottom="16dp"/>
    
</RelativeLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        android:id="@+id/message_user"
        android:textStyle="normal|bold"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:id="@+id/message_time"
        />

    <TextView
        android:id="@+id/message_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/message_user"
        android:layout_alignParentStart="true"
        android:layout_marginTop="5dp"
        android:textAppearance="@style/TextAppearance.AppCompat.Medium"
        android:textSize="18sp" />

</RelativeLayout>