The function of the button without the Internet does not work, what's the problem?

Question

Google AdMob

Hello everyone, I wanted to add interstitial advertising, when you click on a button. When the Internet is on, everything works, I press the button, the ad comes out, then activity2 starts.
but when the internet is off. The button does not work at all and activity2 does not start

mInterstitialAd.setAdListener(new AdListener() { 
@Override 
public void onAdClosed() { 
// Load the next interstitial. 
mInterstitialAd.loadAd(new AdRequest.Builder().build()); 

startActivity(new Intent(activity.this, activity2.class)); 
} 



});

Что можно сюда прописать? Что бы когда нету интернета, при нажатии запускался activity2.class

Button homeBut = (Button)findViewById(R.id.goHomeButt); 


homeBut .setOnClickListener(new View.OnClickListener() { 
@Override 
public void onClick(View v) { 
if (mInterstitialAd.isLoaded()) { 
mInterstitialAd.show(); 
} else { 
// сюда пробовал прописать startActivity(new Intent(activity.this, activity2.class));  
// Но межстраничная реклама перестала запускаться
Log.d("TAG", "The interstitial wasn't loaded yet."); 
} 

} 
});

What can be written here? So that when there is no Internet, when clicked, activity2.class is launched