Interstitial Ad

private static final String TAG = "InterstitialActivity";

private LMInterstitial interstitial;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.interstitial_activity);

    findViewById(R.id.load_ad).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            findViewById(R.id.show_ad).setEnabled(false);
            loadAd();

        }
    });

    findViewById(R.id.show_ad).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (null != interstitial) {
                interstitial.show();
            } else {
                Toast.makeText(InterstitialActivity.this, "Please load Ad before showing it", Toast.LENGTH_SHORT).show();
            }
        }
    });

}

private void initAd() {
    if (null != interstitial) {
        interstitial.destroy();
        interstitial = null;
    }

    interstitial = new LMInterstitial(this, "169", "14688","http://ads.lemmatechnologies.com/lemma/servad");
    interstitial.setListener(new InterstitialListener());
}

private void loadAd() {
    initAd();
    interstitial.ShowAdCloseButton=true; // default value is true if want to remove adclose button set Value false.
    interstitial.loadAd();
}

@Override
protected void onDestroy() {
    super.onDestroy();
    if (null != interstitial) {
        interstitial.destroy();
    }

}

Following are the Listeners

class InterstitialListener implements LMInterstitial.LMInterstitialListener {

    @Override
    public void onAdReceived(LMInterstitial ad) {
        findViewById(R.id.show_ad).setEnabled(true);
    }

    @Override
    public void onAdFailed(LMInterstitial ad, Error error) {
        Log.e(TAG, "Ad failed with error - " + error.toString());
    }

    @Override
    public void onAdOpened(LMInterstitial ad) {
        Log.d(TAG, "Ad Opened");
    }

    @Override
    public void onAdClosed(LMInterstitial ad) {
        Log.d(TAG, "Ad Closed");
        interstitial = null;
    }

}