showInterstitial() Android

public void showInterstitial() {
    // 1. Millennial Media
    if ( mMMInterstitialIsReady ) {
        mMMInterstitial.display();
        mMMInterstitial.fetch();
    }

    // 2. Greystripe
    else if ( mGSInterstitial.isAdReady() ) {
        mGSInterstitial.display();
        mGSInterstitial.fetch();
    }

    // 3. MoPub
    else if ( mMoPubInterstitial.isReady() ) {
        mMoPubInterstitial.setListener( this );
        mMoPubInterstitial.load();
    }

    // 4. AdColony
    else {
        new AdColonyVideoAd( ).show( null );
    }
}