리얼타임 데이터베이스 앱 연결 문제

안녕하세요 복치님

질문마다 답변들 감사드립니다!

저번에도 이 부분에서 아무리 해도 안되서 처음부터 다시 했었거든요! 처음부터 다시 해봐도 같은 문제여서 질문드립니다

저장하기 버튼을 아무리 눌러도 이렇게 화면에 변화가 없는데 뭐가 문제인지 잘 모르겠습니다 도와주세요

<build.gradle>

plugins {
    id 'com.android.application'
    id 'kotlin-android'

}

android {
    compileSdk 33

    defaultConfig {
        applicationId "com.example.diet_memo"
        minSdk 21
        targetSdk 33
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
    }
}
apply plugin: 'com.google.gms.google-services'
dependencies {

    implementation 'androidx.core:core-ktx:1.9.0'
    implementation 'androidx.appcompat:appcompat:1.4.1'
    implementation 'com.google.android.material:material:1.6.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
    implementation platform('com.google.firebase:firebase-bom:31.0.1')
    implementation 'com.google.firebase:firebase-analytics-ktx'
    implementation 'com.google.firebase:firebase-auth-ktx'
    implementation 'com.google.firebase:firebase-database-ktx'
}

<MainActivity>

package com.example.diet_memo

import android.app.DatePickerDialog
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.view.LayoutInflater
import android.widget.Button
import android.widget.DatePicker
import android.widget.ImageView
import androidx.appcompat.app.AlertDialog
import com.google.firebase.database.ktx.database
import com.google.firebase.ktx.Firebase
import java.util.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {

        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val writeButton = findViewById<ImageView>(R.id.writeBtn)
        writeButton.setOnClickListener {

            val mDialogView = LayoutInflater.from(this).inflate(R.layout.custom_dialog, null)
            val mBuilder = AlertDialog.Builder(this)
                .setView(mDialogView)
                .setTitle("운동 메모 다이얼로그")


         val mAlertDialog =  mBuilder.show()


                val DateSelectBtn = mAlertDialog.findViewById<Button>(R.id.dateSelectBtn)
                    DateSelectBtn?.setOnClickListener {

                    val today = GregorianCalendar()
                    val year : Int = today.get(Calendar.YEAR)
                    val month : Int = today.get(Calendar.MONTH)
                    val date : Int = today.get(Calendar.DATE)

                    val dlg = DatePickerDialog(this, object : DatePickerDialog.OnDateSetListener {
                        override fun onDateSet(view: DatePicker?, year: Int, month: Int, dayOfMonth: Int
                        ) {
                            Log.d("MAIN", "${year}, ${month + 1}, ${dayOfMonth}")
                            DateSelectBtn.setText("${year}, ${month + 1}, ${dayOfMonth}")
                        }
                    },year,month,date)
                    dlg.show()
            }

            val saveBtn = mAlertDialog.findViewById<Button>(R.id.saveBtn)
            saveBtn?.setOnClickListener {

                val database = Firebase.database
                val myRef = database.getReference("message")

                myRef.setValue("Hello, World!")


            }

        }
    }