title: Admob Interstitial ad on Button Click
body: <p>I have an application and I am using admob banners to it. Now I want to show interstitial ad on Button click. 
  My application have 2 activity, and I want to show interstitial ad on the second activity. Second activity has a button which goes back to first activity, and I want to show the ad after the button click. I am able to show the ad on button click but when the user closes the ad or press the back button it remain on the second activity and thats the problem I am facing.</p>
  
  <p>SecondActivity Code:-</p>
  
  <pre><code>btn.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View arg0) {
              // TODO Auto-generated method stub
  
  
               if (interstitial.isLoaded()) {
                    interstitial.show();
                  }
               else{
  
              Intent i = new Intent();
              i.setClass(SecondActivity.this, FirstActivity.class);
              startActivity(i);
              finish();
               }
          }
      });
  
  }
  </code></pre>
  
  <p>I want when the user clicks on button the ad should be seen and when he closes the ad he should return to first activity</p>