【Unity】自作ゲームにAdmob広告を実装する（バナー広告・インタースティシャル広告）

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using GoogleMobileAds.Api;

public class GoogleAdmobBanner : MonoBehaviour
{
    BannerView bannerView;

    void Start()
    {
        // ★リリース時に自分のIDに変更する
        #if UNITY_ANDROID
                string appId = "ca-app-pub-3940256099942544~3347511713";
        #elif UNITY_IPHONE
                string appId = "ca-app-pub-3940256099942544~1458002511";
        #else
                string appId = "unexpected_platform";
        #endif
        // Initialize the Google Mobile Ads SDK.
        MobileAds.Initialize(appId);

        RequestBanner();
    }

    private void RequestBanner()
    {
        // ★リリース時に自分のIDに変更する
        #if UNITY_ANDROID
                string adUnitId = "ca-app-pub-3940256099942544/6300978111";
        #elif UNITY_IPHONE
                string adUnitId = "ca-app-pub-3940256099942544/2934735716";
        #else
                string adUnitId = "unexpected_platform";
        #endif
        // Create a 320x50 banner at the top of the screen.
        bannerView = new BannerView(adUnitId, AdSize.Banner, AdPosition.Top);

        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();

        // Load the banner with the request.
        bannerView.LoadAd(request);

    }

    private void OnDestroy()
    {
        bannerView.Destroy();
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;
using GoogleMobileAds.Api;
using System;
using UniRx;

public class GoogleAdmobInterstitial : MonoBehaviour
{
    /** 変数 */
    private InterstitialAd interstitial;
    private bool showing;
    public string loadEventParam; // 読込イベント名(遷移元で渡されるゴロ)

    void Start()
    {
        showing = false;
        // 広告読み込み
        RequestInterstitial();
    }

    void Update()
    {
        // 広告表示
        if (interstitial.IsLoaded() && !showing)
        {
            interstitial.Show();
            showing = true;
        }
    }

    // 広告読み込み処理
    private void RequestInterstitial()
    {
        // ★リリース時に自分のIDに変更する
        #if UNITY_ANDROID
                string adUnitId = "ca-app-pub-3940256099942544/1033173712";
        #elif UNITY_IPHONE
                string adUnitId = "ca-app-pub-3940256099942544/4411468910";
        #else
                string adUnitId = "unexpected_platform";
        #endif

        // Initialize an InterstitialAd.
        interstitial = new InterstitialAd(adUnitId);

        // Called when an ad request has successfully loaded.
        this.interstitial.OnAdLoaded += HandleOnAdLoaded;
        // Called when an ad request failed to load.
        this.interstitial.OnAdFailedToLoad += HandleOnAdFailedToLoad;
        // Called when an ad is shown.
        this.interstitial.OnAdOpening += HandleOnAdOpened;
        // Called when the ad is closed.
        this.interstitial.OnAdClosed += HandleOnAdClosed;
        // Called when the ad click caused the user to leave the application.
        this.interstitial.OnAdLeavingApplication += HandleOnAdLeavingApplication;

        // Create an empty ad request.
        AdRequest request = new AdRequest.Builder().Build();
        // Load the interstitial with the request.
        interstitial.LoadAd(request);
    }

    // シーン遷移処理
    private void LoadNextScene()
    {
        SceneManager.LoadScene(【遷移先シーン名】);
    }

    private void OnDestroy()
    {
        // オブジェクトの破棄
        interstitial.Destroy();
    }

    // ---以下、イベントハンドラー
    
    // 広告の読み込み完了時
    public void HandleOnAdLoaded(object sender, EventArgs args)
    {
    }

    // 広告の読み込み失敗時
    public void HandleOnAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
    {
        // 次のシーンに遷移
        LoadNextScene();
    }

    // 広告がデバイスの画面いっぱいに表示されたとき
    public void HandleOnAdOpened(object sender, EventArgs args)
    {
    }

    // 広告を閉じたとき
    public void HandleOnAdClosed(object sender, EventArgs args)
    {
        // 次のシーンに遷移
        LoadNextScene();
    }
    
    // 別のアプリ（Google Play ストアなど）を起動した時
    public void HandleOnAdLeavingApplication(object sender, EventArgs args)
    {
    }
}

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public class GoogleAdmobInterstitial : MonoBehaviour
{
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    // 広告読み込み処理
    private void RequestInterstitial()
    {
・・・略・・・

        // Called when an ad request has successfully loaded.
        this.interstitial.OnAdLoaded += HandleOnAdLoaded;
        // Called when an ad request failed to load.
        this.interstitial.OnAdFailedToLoad += HandleOnAdFailedToLoad;
        // Called when an ad is shown.
        this.interstitial.OnAdOpening += HandleOnAdOpened;
        // Called when the ad is closed.
        this.interstitial.OnAdClosed += HandleOnAdClosed;
        // Called when the ad click caused the user to leave the application.
        this.interstitial.OnAdLeavingApplication += HandleOnAdLeavingApplication;

・・・略・・・
    }

・・・略・・・

    // ---以下、イベントハンドラー
    
    // 広告の読み込み完了時
    public void HandleOnAdLoaded(object sender, EventArgs args)
    {
    }

    // 広告の読み込み失敗時
    public void HandleOnAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
    {
        // 次のシーンに遷移
        LoadNextScene();
    }

    // 広告がデバイスの画面いっぱいに表示されたとき
    public void HandleOnAdOpened(object sender, EventArgs args)
    {
    }

    // 広告を閉じたとき
    public void HandleOnAdClosed(object sender, EventArgs args)
    {
        // 次のシーンに遷移
        LoadNextScene();
    }
    
    // 別のアプリ（Google Play ストアなど）を起動した時
    public void HandleOnAdLeavingApplication(object sender, EventArgs args)
    {
    }
}