我的代码一定有问题，它将按钮的背景色更改为灰色，并带有黑色文本，并且在运行应用程序进行测试时更改了按钮的大小。我不能指出哪里出了问题。请帮忙。这可能是我的代码和admob之间的冲突，也可能是代码的结构。

package com.example.kakurosidekick;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import com.google.android.gms.ads.MobileAds;
import com.google.android.gms.ads.initialization.InitializationStatus;
import com.google.android.gms.ads.initialization.OnInitializationCompleteListener;

import java.util.Arrays;
public class MainActivity extends Activity implements View.OnClickListener {

ListView list;
    String[] kakNmbrs_25_5 = {"1+2+5+8+9", "1+2+6+7+9", "1+3+4+8+9", "1+3+5+7+9", "1+3+6+7+8", "1+4+5+6+9", "1+4+5+7+8",
            "2+3+4+7+9", "2+3+5+6+9", "2+3+5+7+8", "2+4+5+6+8", "3+4+5+6+7"};
    String mstrButtn = String.valueOf(0);

        private AdView mAdView;

        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            Button btn3 = (Button) findViewById(R.id.button3);
            Button btn4 = (Button) findViewById(R.id.button4);
           Button btn25 = (Button) findViewById(R.id.button25);
            Button dbtn2 = (Button) findViewById(R.id.DigiB2);
           btn3.setOnClickListener(this); // calling onClick() method
            btn4.setOnClickListener((View.OnClickListener) this);
            btn25.setOnClickListener(this);
            dbtn2.setOnClickListener((View.OnClickListener) this);
            list = findViewById(R.id.myList);
            Arrays.sort(kakNmbrs_25_5);

            MobileAds.initialize(this, new OnInitializationCompleteListener() {

                public void goToAnActivity(View view) {

                }
                public void onInitializationComplete(InitializationStatus initializationStatus) {
                }
            });

            mAdView = findViewById(R.id.adView);
            AdRequest adRequest = new AdRequest.Builder().build();
            mAdView.loadAd(adRequest);
        }

    @Override
    public void onClick(View v) {
        Button btn03 = (Button) findViewById(R.id.button3);
        Button btn04 = (Button) findViewById(R.id.button4);
        Button btn05 = (Button) findViewById(R.id.button5);
        Button btn06 = (Button) findViewById(R.id.button6);

        Button[] buttonArray = {btn05, btn04, btn03};

        ArrayAdapter adapter = new ArrayAdapter<String>(this, R.layout.mytextsize, android.R.id.text1, kakNmbrs_25_5);

        switch (v.getId()) {

            case R.id.button3:
                mstrButtn = "3";
                Log.i(mstrButtn, "I just clicked on");
                break;

            default:
                break;}}}

它看起来是这样的：

这就是它应该看起来的样子

我的activity\u main.xml如下所示：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
    android:background="@android:color/black"
    tools:context=".MainActivity">
<Button
        android:id="@+id/button3"
        android:layout_width="40dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="3dp"
        android:layout_marginLeft="3dp"
        android:layout_marginTop="3dp"
        android:paddingLeft="0dp"
        android:paddingTop="0dp"
        android:paddingRight="0dp"
        android:paddingBottom="0dp"
        android:text="3"
        android:textSize="24sp"
        android:backgroundTint="#8C8A8A"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/divider3" />
<Button
        android:id="@+id/DigiB3"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_marginTop="70dp"
        android:layout_marginEnd="15dp"
        android:layout_marginRight="15dp"
        android:padding="0dp"
        android:paddingLeft="0dp"
        android:paddingTop="0dp"
        android:paddingRight="0dp"
        android:paddingBottom="0dp"
        android:text="3"
        android:textSize="30sp"
        app:backgroundTint="#009688"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="@+id/divider3" />

    <com.google.android.gms.ads.AdView
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_gravity="bottom|center_horizontal"
        android:layout_marginTop="8dp"
        app:adSize="BANNER"
        app:adUnitId="ca-app-pub-3940256099942544/6300978111"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.4"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@+id/divider6"
        app:layout_constraintVertical_bias="0.0">

    </com.google.android.gms.ads.AdView>