MobileAds.initialize(getContext(),
                "ca-app-pub-3940256099942544~3347511713");

        mInterstitialAd = new InterstitialAd(getContext());
        mInterstitialAd.setAdUnitId("ca-app-pub-3940256099942544/1033173712");
        mInterstitialAd.loadAd(new AdRequest.Builder().build());


        mInterstitialAd.setAdListener(new AdListener() {
            @Override
            public void onAdLoaded() {
                // Code to be executed when an ad finishes loading.
                Toast.makeText(getContext(), "onAdLoaded Add", Toast.LENGTH_SHORT).show();
                if (mInterstitialAd.isLoaded()) {
                    mInterstitialAd.show();
                }
            }

            @Override
            public void onAdFailedToLoad(int errorCode) {
                // Code to be executed when an ad request fails.

            }

            @Override
            public void onAdOpened() {
                // Code to be executed when the ad is displayed.

            }

            @Override
            public void onAdLeftApplication() {
                // Code to be executed when the user has left the app.

            }

            @Override
            public void onAdClosed() {
                // Code to be executed when when the interstitial ad is closed.

            }
        });