How to Implement Admob Interstitial Ad in Android Application

In previous post i explained about how to implement Admob Banner Ad, in this post i will show you how to add Admob Interstitial Ad to your android app.

Note: Please read Admob policy before implementing Admob Interstitial ad. Violating Admob terms may lead to suspension of your Admob account.

Procedure

Open your Project in Android Studio

Add below line to your build.gradle in dependencies

compile 'com.google.android.gms:play-services-ads:8.4.0'

Now open MainActivity,java and add below 2 & 3 lines in public class as shown below

public class MainActivity extends AppCompatActivity {InterstitialAd mInterstitialAd;private InterstitialAd interstitial;
}

Now open MainActivity,java and add below lines inside onCreate method

    AdRequest adRequest = new AdRequest.Builder().build();                // Prepare the Interstitial Ad        interstitial = new InterstitialAd(MainActivity.this);// Insert the Ad Unit ID        interstitial.setAdUnitId(getString(R.string.admob_interstitial_id));
        interstitial.loadAd(adRequest);// Prepare an Interstitial Ad Listener        interstitial.setAdListener(new AdListener() {            public void onAdLoaded() {// Call displayInterstitial() function                displayInterstitial();            }        });

Now add below method to your  MainActivity.java

public void displayInterstitial() {// If Ads are loaded, show Interstitial else show nothing.if (interstitial.isLoaded()) {interstitial.show();}}

Now open strings.xml from values folder and add below string to it.

<string name="admob_interstitial_id">ca-app-pub3940256099942544/1033173712</string>

Note: Admob id used in this post for demonstration is a test ad id. Please get your interstitial admob ad id  from Admob