通过设置广告的加载类型来停止App Open广告的弹出。具体做法如下：

在OnActivityResult方法中添加以下代码：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if(requestCode == YOUR_REQUEST_CODE && resultCode == RESULT_OK) {
        // Stop App Open Ads from showing after Intent was called
        LoadAdError loadAdError = MobileAds.getInitializationStatus().getAdapterStatusMap().get("com.google.android.gms.ads.MobileAds");
        if(loadAdError == null) {
            AppOpenAd.load(context, YOUR_AD_UNIT_ID, new AdRequest.Builder().build(), AppOpenAd.APP_OPEN_AD_ORIENTATION_PORTRAIT, (AppOpenAd.LoadCallback) new AppOpenAd.LoadCallback() {
                @Override
                public void onAdLoaded(@NonNull AppOpenAd appOpenAd) {
                    // Store the appOpenAd object in a global variable
                    appOpenAdObject = appOpenAd;
                }

                @Override
                public void onAdFailedToLoad(@NonNull LoadAdError loadAdError) {
                    // Handle the error
                }
            });
        }
    }
}

在Activity或Application类中添加以下代码：

@Override
public void onCreate() {
    super.onCreate();

    // Initialize Mobile Ads SDK
    MobileAds.initialize(this, new OnInitializationCompleteListener() {
        @Override
        public void onInitializationComplete(InitializationStatus initializationStatus) {
            // Do nothing
        }
    });

    // Load App Open Ad
    LoadAdError loadAdError = MobileAds.getInitializationStatus().getAdapterStatusMap().get("com.google.android.gms.ads.MobileAds");
    if(loadAdError == null) {
        AppOpenAd.load(context, YOUR_AD_UNIT_ID, new AdRequest.Builder().build(), AppOpenAd.APP_OPEN_AD_ORIENTATION_PORTRAIT, (AppOpenAd.LoadCallback) new AppOpenAd.LoadCallback() {
            @Override
            public void onAdLoaded(@NonNull AppOpenAd appOpenAd) {
                // Store the appOpenAd object in a global variable
                appOpenAdObject = appOpenAd;
            }