New Admob Interstitial

I am doing it this way (note the AdRequest and load() are done in one place) and it seems to work for repeated use.

Note: it is important not to store references to objects in static variables in other classes on android (they can get garbage collected).

private InterstitialAd adObject = null;

	adObject = new InterstitialAd(activity, APP_ID);

// ad request and show() cycle ..
	// request ad
		// Create ad request
		AdRequest adRequest = new AdRequest();

		// Begin loading your interstitial

	// some time passes ..
	// later you do ..

	if (adObject.isReady()) {;

	adObject = null;